New minerals and nomenclature approved by IMA CNMNC in April and May 2019

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Marco E. Ciriotti
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New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » ven 24 mag, 2019 14:08

NEW MINERAL PROPOSALS APPROVED IN APRIL 2019

IMA No. 2018-141
Andymcdonaldite
Fe2TeO6
Wildcat prospect, NW portion of the Detroit District, Juab Co., Utah, USA
Mati Raudsepp*, Mark F. Coolbaugh, John K. McCormack, Edith Czech and Rhy McMillan
*E-mail: mraudsepp@eoas.ubc.ca
Known synthetic analogue
Tetragonal: P42/mnm
a = 4.6222(9), c = 9.077(3) Å
4.538(12), 4.119(35), 3.268(100), 2.652(10), 2.531(58), 2.311(13), 1.707(48), 1.634(14)
Type material is deposited in the mineralogical collections of the Smithsonian National Museum of Natural History, 10th St. & Constitution Ave., Washington, DC 20560, USA, catalogue number NMNH 177134
How to cite: Raudsepp, M., Coolbaugh, M.F., McCormack, J.K., Czech, E. and McMillan, R. (2019) Andymcdonaldite, IMA 2018-141. CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-142
Aluminosugilite
KNa2Al2Li3Si12O30
Cerchiara mine, Faggiona, Borghetto Vara-Pignone,
La Spezia, Liguria, Italy (44°11’57”N, 9°42’1”E)
Mariko Nagashima*, Chihiro Fukuda, Takashi
Matsumoto, Teruyoshi Imaoka, Gianluca Odicino
and Gianluca Armellino
*E-mail: nagashim@yamaguchi-u.ac.jp
Osumilite group
Hexagonal: P6/mcc; structure determined
a = 9.9830(4), c = 13.9667(5) Å
4.32(100), 4.06(38), 3.67(14), 3.48(30), 3.18(92),
2.86(70), 2.71(18), 2.49(18)
Type material is deposited in the mineralogical
collections of the National Museum of Nature and
Science, Tsukuba, Japan, specimen numbers NSMMF-
16503
How to cite: Nagashima, M., Fukuda, C., Matsumoto,
T., Imaoka, T., Odicino, G. and Armellino, G. (2019)
Aluminosugilite, IMA 2018-142. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323-xxx.

IMA No. 2018-150
Siwaqaite
Ca6Al2(CrO4)3(OH)12·26H2O
North Siwaqa complex, Lisdan-Siwaqa Fault,
Hatrurim Complex, ca. 60 km S of Amman, Jordan
(31°24’15”N, 36°14’34”E)
Rafał Juroszek*, Biljana Krüger, Irina O. Galuskina,
Hannes Krüger, Yevgeny Vapnik and Evgeny V.
Galuskin
*E-mail: rjuroszek@us.edu.pl
The Cr analogue of ettringite
Trigonal: P31c; structure determined
a = 11.3640(2), c = 21.4485(2) Å
9.841(100), 5.682(65), 5.021(16), 4.709(38),
3.900(29), 3.280(17), 3.279(33), 2.224(16)
Type material is deposited in the collections of the
Fersman Mineralogical Museum, Russian Academy
of Sciences, Leninskiy Prospekt 18-2, Moscow
119071, Russia, registration number 5277/1
How to cite: Juroszek, R., Krüger, B., Galuskina,
I.O., Krüger, H., Vapnik, Y. and Galuskin, E.V.
(2019) Siwaqaite, IMA 2018-150. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-154
Luxembourgite
AgCuPbBi4Se8
Bivels, Luxembourg (49°57’8”N, 6°10’41”E)
Simon Philippo, Frédéric Hatert*, Yannick Bruni and
Pietro Vignola
*E-mail: fhatert@uliege.be
Isostructural with watkinsonite and litochlebite
Monoclinic: P21/m; structure determined
a = 13.002(1), b = 4.1543(3), c = 15.312(2) Å, β =
108.92(1)°
4.61(20), 3.59(20), 2.984(100), 2.425(20), 2.085(60),
1.916(20), 1.355(30), 1.188(30)
Type material is deposited in the mineralogical
collections of the Natural History Museum of
Luxembourg, Rue Münster 25, L-2560 Luxembourg,
Luxembourg, catalogue number FD040, and the
Laboratory of Mineralogy, University of Liège,
Bâtiment B18, Sart Tilman, B-4000 Liège, Belgium,
catalogue number 21302
How to cite: Philippo, S., Hatert, F., Bruni, Y. and
Vignola, P. (2019) Luxembourgite, IMA 2018-154.
CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-156
Tsikourasite
Mo3Ni2P1+x (x < 0.25)
Agios Stefanos mine, ca. 10 km S of the Domokos
village, Othrys ophiolite, Greece (39°4’59”N,
22°25’59”E)
Federica Zaccarini*, Luca Bindi, Elena Ifandi, Tassos
Grammatikopoulos, Chris J. Stanley, Giorgio Garuti
and Daniela Mauro
*E-mail: Federica.Zaccarini@unileoben.ac.at
Known synthetic analogue
Cubic: F 4 3m; structure determined
a = 10.8215(5) Å
2.705(20), 2.483(18), 2.209(65), 2.083(100),
1.913(32), 1.803(12), 1.275(26), 1.089(12)
Type material is deposited in the mineralogical
collections of the Museo di Storia Naturale,
Università di Firenze, Via La Pira 4, I-50121,
Firenze, Italy, catalogue number 3296/I
How to cite: Zaccarini, F., Bindi, L., Ifandi, E.,
Grammatikopoulos, T., Stanley, C.J., Garuti, G. and
Mauro, D. (2019) Tsikourasite, IMA 2018-156.
CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-157
Laurentthomasite
Mg2K(Be2Al)Si12O30
40 km E of the village of Betroka, in a rural
area named Beravina, close to the small village of
Ambaro, Toliara province, Madagascar (23°21’0”S,
46°25’0”E)
Cristiano Ferraris*, Isabella Pignatelli, Fernando
Cámara, Sylvain Ponti, Martin Schreyer, Gian Carlo
Parodi and Fengxia Wei
*E-mail: ferraris@mnhn.fr
The Mg analogue of milarite
Hexagonal: P6/mcc; structure determined
a = 9.95343(6), c = 14.15583(8) Å
7.055(2), 4.965(6), 4.302(2), 4.064(8), 3.533(3),
3.171(10), 2.881(8), 2.372(4)
Type material is deposited in the mineralogical
collections of the Muséum National d’Histoire
Naturelle, 61 rue Buffon, 75005 Paris, France,
catalogue numbers 218.1_a (holotype), 218.1_b and 218.1_c (cotypes)
How to cite: Ferraris, C., Pignatelli, I., Cámara, F., Ponti, S., Schreyer, M., Parodi, G.C. and Wei, F. (2019) Laurentthomasite, IMA 2018-157. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-158
Kahlenbergite
KAl11O17
Ca. 300 m NE of the Parsa Mt, Negev Desert, Hatrurim Basin, Israel (31°12.18’N, 36°15.31’E)
Biljana Krüger*, Evgeny V. Galuskin, Irina O. Galuskina, Hannes Krüger and Yevgeny Vapnik
*E-mail: biljana.krueger@uibk.ac.at
The K analogue of diaoyudaoite
Hexagonal: P63/mmc; structure determined
a = 5.64860(6), c = 22.8970(3) Å
11.448(100), 5.724(15), 2.824(14), 2.719(34), 2.533(26), 2.059(12), 1.610(13), 1.412(19)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5295/1
How to cite: Krüger, B., Galuskin, E.V., Galuskina, I.O., Krüger, H. and Vapnik, Y. (2019) Kahlenbergite, IMA 2018-158. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-159
Scorticoite
Mn6(Sb☐)Σ2(SiO4)2O3(OH)3
Scortico Mn ore deposit, Fivizzano, Apuan Alps, Massa Carrara, Tuscany, Italy (44°07’39”N, 10°07’12”E)
Cristian Biagioni*, Elena Bonaccorsi, Anthony R. Kampf, Federica Zaccarini, Ulf Hålenius and Ferdinando Bosi
*E-mail: cristian.biagioni@unipi.it
Welinite group
Trigonal: P3; structure determined
a = 8.205(1), c = 4.774(1) Å
3.105(s), 2.858(s), 2.676(ms), 2.332(ms), 1.787(s), 1.685(m), 1.552(m)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci, Pisa, Italy, catalogue number 19908
How to cite: Biagioni, C., Bonaccorsi, E., Kampf, A.R., Zaccarini, F., Hålenius, U. and Bosi, F. (2019) Scorticoite, IMA 2018-159. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-160
Potassic-hastingsite
KCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Danailingou, Tongxing town, Keshiketeng Banner, Inner Mongolia, China (43°43’18”N, 117°34’37”E)
Guangming Ren*, Guowu Li, Jiaxin Shi, Xiangping Gu, Guang Fan, Apeng Yu, Qiuxiao Liu and Ganfu Shen
*E-mail: rguangming928@sina.com
Amphibole supergroup
Monoclinic: C2/m; structure determined
a = 9.9405(7), b = 18.256(2), c = 5.3501(3) Å, β = 105.117(5)°
8.504(100), 3.417(36), 3.155(63), 2.735(71), 2.623(35), 2.570(34), 2.365(29), 2.179(30)
Type material is deposited in the mineralogical collections of the Geological Museum of China, Beijing, China, catalogue number M13815
How to cite: Ren, G., Li, G., Shi, J., Gu, X., Fan, G.,Yu, A., Liu, Q. and Shen, G. (2019) Potassic-hastingsite, IMA 2018-160. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-161
Rumoiite
AuSn2
Minamichiyoda, Shosanbetsu village, Rumoi Subprefecture, Hokkaido, Japan (44°31’21”N, 141°46’51”E)
Daisuke Nishio-Hamane* and Katsuyuki Saito
*E-mail: hamane@issp.u-tokyo.ac.jp
Known synthetic analogue
Orthorhombic: Pbca
a = 6.905(2), b = 7.017(2), c = 11.797(3) Å
4.542(58), 3.774(48), 2.950(100), 2.711(52), 2.409(41), 2.244(56), 2.136(47), 2.123(65)
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM-M46178 (holotype) and M46179 (cotype)
How to cite: Nishio-Hamane, D. and Saito, K. (2019) Rumoiite, IMA 2018-161. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-162
Shosanbetsuite
Ag3Sn
Minamichiyoda, Shosanbetsu village, Rumoi Subprefecture, Hokkaido, Japan (44°31’21”N, 141°46’51”E)
Daisuke Nishio-Hamane* and Katsuyuki Saito
*E-mail: hamane@issp.u-tokyo.ac.jp
Known synthetic analogue
Orthorhombic: Pmmn
a = 5.998(5), b = 4.7736(9), c = 5.154(3) Å
2.592(10), 2.586(7), 2.389(30), 2.275(100), 2.267(85), 1.756(78), 1.356(73), 1.354(53)
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM-M46178 (holotype) and M46179 (cotype)
How to cite: Nishio-Hamane, D. and Saito, K. (2019) Shosanbetsuite, IMA 2018-162. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-165
Giacovazzoite
K5Fe3+3O(SO4)6·10H2O
Monte Arsiccio mine, Stazzema (LU), Apuan Alps, Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni*, Luca Bindi, Daniela Mauro and Marco Pasero
*E-mail: cristian.biagioni@unipi.it
Known synthetic analogue
Monoclinic: P21/c; structure determined
a = 9.4797(2), b = 18.4454(5), c = 18.0540(4) Å, β = 92.626(2)°
9.1(s), 8.2(vs), 4.15(mw), 4.02(mw), 3.442(m), 3.371(m), 3.005(m), 2.968(m)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci, Pisa, Italy, catalogue number 19896
How to cite: Biagioni, B., Bindi, L., Mauro, D. and Pasero, M. (2019) Giacovazzoite, IMA 2018-165. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-166
Pseudomeisserite-(NH4)
(NH4)2Na4[(UO2)2(SO4)5]·4H2O
Blue Lizard mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°33’26”N, 110°17’44”W)
Anthony R. Kampf*, Travis A. Olds, Jakub Plášil, Barbara P. Nash and Joe Marty
*E-mail: akampf@nhm.org
New structure type
Monoclinic: P21/c; structure determined
a = 13.1010(3), b = 10.0948(2), c = 19.494(1) Å, β = 104.285(7)°
12.69(76), 8.88(55), 6.83(84), 6.01(100), 4.593(51), 4.414(57), 3.959(67), 3.135(76)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 67621 and 67622
How to cite: Kampf, A.R., Olds, T.A., Plášil, J., Nash, B.P. and Marty, J. (2019) Pseudomeisserite-(NH4), IMA 2018-166. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-167
Gobelinite
CoCu4(SO4)2(OH)6·6H2O
Cap Garonne mine (pillar 78b in the north mine), Var, Provence-Alpes-Côte d’Azur, France (43°4’53”N, 6°1’55”E – type locality); Schlänger und Eichert vein of the Eisenzecher Zug mine, Eiserfeld, Siegerland, North Rhine-Westphalia, Germany (50°49’9”N, 7°59’14”E – cotype locality)
Stuart J. Mills*, Uwe Kolitsch, Georges Favreau, William D. Birch, Valérie Galea-Clolus and Johannes Markus Henrich
*E-mail: smills@museum.vic.gov.au
The Co analogue of ktenasite
Monoclinic: P21/c; structure determined
a = 5.599(1), b = 6.084(1), c = 23.676(5) Å, β = 95.22(3)°
11.870(100), 5.924(40), 4.883(10), 4.825(15), 3.946(15), 2.956(15), 2.663(20), 2.561(15)
Type material is deposited in the mineralogical collections of Geosciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia, registration number M54565 (Cap Garonne), and the Naturhistorisches Museum, Burgring 7, A-1010 Wien, Austria, registration number O 1045 (Eisenzecher Zug)
How to cite: Mills, S.J., Kolitsch, U., Favreau, G., Birch, W.D., Galea-Clolus, V. and Henrich, J.M. (2019) Gobelinite, IMA 2018-167. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-108a
Fluorapophyllite-(Cs)
CsCa4(Si8O20)F(H2O)8
Darai-Pioz glacier, Alai mountain range, Tien-Shan, Rashtskii district, Tajikistan (39°30’N, 70°40’E)
Atali A. Agakhanov, Leonid A. Pautov, Anatoly V. Kasatkin, Elena Sokolova, Maxwell C. Day, Frank C. Hawthorne, Vladimir Y. Karpenko, Vyacheslav A. Muftakhov, Igor V. Pekov, Fernando Cámara Artigas and Sergey N. Britvin
*E-mail: atali99@mail.ru
Apophyllite group
Tetragonal: P4/nmc
a = 9.060(6), c = 15.741(11) Å
7.870(100), 3.935(100), 3.602(55), 2.974(84), 2.515(73), 2.486(71), 2.119(42), 2.030(45)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5280/1
How to cite: Agakhanov, A.A., Pautov, L.A., Kasatkin, A.V., Sokolova, E., Day, M.C., Hawthorne, F.C., Karpenko, V.Y., Muftakhov, V.A., Pekov, I.V., Cámara Artigas, F. and Britvin, S.N. (2019) Fluorapophyllite-(Cs), IMA 2018-108a. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

NEW MINERAL PROPOSALS APPROVED IN MAY 2019

IMA No. 2019-001
Smamite
Ca2Sb(OH)4[H(AsO4)2]·6H2O
Giftgrube mine, St. Jacques vein, Rauenthal, Sainte Marie-aux-Mines, Haut-Rhin province, France (48°13’28”N, 7°9’7”E)
Jakub Plášil*, Anthony R. Kampf, Nicolas Meisser, Cédric Lheur, Thierry Brunsperger and Radek Škoda
*E-mail: plasil@fzu.cz
New structure type
Triclinic: P1; structure determined
a = 6.8207(4), b = 8.0959(4), c = 8.2130(6) Å, α =
95.834(7), β = 110.762(8), γ = 104.012(7)°
7.56(41), 6.03(60), 5.66(47), 5.07(100), 3.992(43),
3.783(36), 2.858(51), 2.766(31)
Type material is deposited in the mineralogical
collections of the Musée Cantonal de Géologie,
University of Lausanne, Anthropole, Dorigny, CH-
1015 Lausanne, Switzerland, catalogue number MGL
093481 (holotype), 093482 and 093481 (cotypes),
and the Natural History Museum of Los Angeles
County, 900 Exposition Boulevard, Los Angeles, CA
90007, USA, catalogue number 67169 (cotype)
How to cite: Plášil, J., Kampf, A.R., Meisser, N.,
Lheur, C., Brunsperger, T. and Škoda, R. (2019)
Smamite, IMA 2019-001. CNMNC Newsletter No.
49, June 2019, page xxx; Mineralogical Magazine,
83, 323–328.

IMA No. 2019-002
Caseyite
[(V5+O2)Al7.5(OH)15(H2O)13]2[H2V4+V5+9O28][V5+10O28]2·90H2O
West Sunday mine, Slick Rock district, San Miguel
Co., Colorado, USA (38°4’48.03”N,
108°49′18.07”W); Packrat mine, near Gateway, Mesa
Co., Colorado, USA (38°38’51.28”N,
109°2’49.77”W); Burro mine, Slick Rock district,
San Miguel Co., Colorado, USA (38°2’42”N,
108°53’23”W)
Anthony R. Kampf*, Mark A. Cooper, John M.
Hughes, Barbara P. Nash, Joe Marty and Frank C.
Hawthorne
*E-mail: akampf@nhm.org
New structure type
Monoclinic: P21/n; structure determined
a = 14.123(8), b = 31.00(1), c = 21.95(1) Å, β =
97.961(8)°
17.798(92), 15.499(100), 12.749(26), 12.620(33),
10.869(16), 9.332(11), 9.016(14), 8.899(43)
Type material is deposited in the mineralogical
collections of the Natural History Museum of Los
Angeles County, 900 Exposition Boulevard, Los
Angeles, CA 90007, USA, catalogue numbers 73526
(Packrat – holotype), 73527 and 73528 (Packrat –
cotypes), 73529 (West Sunday – cotype), 73530 and
73531 (Burro – cotypes)
How to cite: Kampf, A.R., Cooper, M.A., Hughes,
J.M., Nash, B.P., Marty, J. and Hawthorne, F.C.
(2019) Caseyite, IMA 2019-002. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2019-005
Langhofite
Pb2(OH)[WO4(OH)]
Långban deposit, Filipstad district, Värmland,
Sweden (59.85°N, 14.26°E, 215 m a.s.l.)
Dan Holtstam*, Fernando Cámara and Andreas Karlsson
*E-mail: dan.holtstam@nrm.se
New structure type
Triclinic: P1; structure determined
a = 6.6118(3), b = 7.0748(4), c = 7.3264(4) Å, α =
118.125(6), β = 94.503(5), γ = 101.146(5)°
6.04(24), 3.330(17), 3.259(22), 3.181(19), 3.079(24),
3.016(100), 2.053(20), 2.050(18)
Type material is deposited in the mineralogical
collections of the Department of Geosciences,
Swedish Museum of Natural History, Box 50007,
SE-104 05 Stockholm, Sweden, collection number
GEO-NRM 20030044
How to cite: Holtstam, D., Cámara, F. and Karlsson,
A. (2019) Langhofite, IMA 2019-005. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2019-006
Magnanelliite
K3Fe3+2(SO4)4(OH)(H2O)2
Monte Arsiccio mine, Stazzema, Apuan Alps,
Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni, Luca Bindi and Anthony R. Kampf
*E-mail: cristian.biagioni@unipi.it
The Fe3+ analogue of alcaparrosaite
Monoclinic: C2/c; structure determined
a = 7.5491(3), b = 16.8652(6), c = 12.1574(4) Å, β = 94.064(1)°
6.9(m), 4.91(mw), 3.612(mw), 3.427(mw),
3.300(mw), 3.085(s), 3.006(m), 2.704(m)
Type material is deposited in the mineralogical
collections of the Museo di Storia Naturale,
Università di Pisa, Via Roma 79, Calci (Pisa, Italy),
catalogue number 19894 (holotype), and the Natural
History Museum of Los Angeles County, 900
Exposition Boulevard, Los Angeles, CA 90007,
USA, catalogue number 67241 (cotype)
How to cite: Biagioni, C., Bindi, L. and Kampf, A.R.
(2019) Magnanelliite, IMA 2019-006. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

NOMENCLATURE PROPOSALS APPROVED IN MARCH 2019

IMA 18-C: Redefinition of calumetite and discreditation of vondechenite

Proposal 18-C is accepted, and calumetite is redefined
from Cu(OH,Cl)2·2H2O to CaCu4(OH)8Cl2·3.5H2O.
Vondechenite (IMA2016-65), identical to calumetite, is
consequently discredited.

IMA 18-I: Nomenclature of minerals of the rhodonite group

Proposal 18-I is accepted, and the rhodonite group is
established. Currently it consists of two mineral species
having the following end-member formulae: rhodonite,
M5CaM1-M3Mn3M4MnSi5O15, and ferrorhodonite M5CaM1-M3Mn3M4FeSi5O15.

IMA 19-A: Redefinition of tsugaruite

Proposal 19-A is accepted, and tsugaruite is redefined as a lead-arsenic chloro-sulfosalt, having ideal formula Pb28As15S50Cl.

NOMENCLATURE PROPOSALS APPROVED IN APRIL 2019

IMA 18-H: Redefinition of cadwaladerite and discreditation of lesukite

Proposal 18-H is accepted, demonstrating that cadwaladerite and lesukite are the same mineral species. Because cadwaladerite has historical precedence, it is recognized as a valid mineral species, whereas lesukite is discredited. Furthermore, the formula of cadwaladerite is redefined as Al5(H2O)3(OH)12·n(Cl,H2O).

IMA 18-K: Nomenclature and classification of the tetrahedrite group

Proposal 18-K on the tetrahedrite group is accepted. The general structural formula of minerals belonging to this group is M(2)A6M(1)(B4C2)Σ6X(3)D4S(1)Y12S(2)Z (Z = 2), where A = Cu+, Ag+, ☐; B = Cu+, Ag+; C = Zn2+, Fe2+, Hg2+, Cd2+, Mn2+, Cu2+, Cu+, Fe3+; D = Sb3+, As3+, Bi3+, Te4+; Y = S2-, Se2-; and Z = S2-, Se2-, ☐. The tetrahedrite group is divided into five different series on the basis of the A, B, D, and Y constituents, i.e. the tetrahedrite, tennantite, freibergite, hakite, and giraudite series. The nature of the dominant C constituent is made explicit using a hyphenated suffix between parentheses. Eleven minerals belonging to the tetrahedrite group can be considered as valid species: argentotennantite-(Zn), argentotetrahedrite-(Fe), kenoargentotetrahedrite-(Fe), giraudite-(Zn), goldfieldite, hakite-(Hg), rozhdestvenskayaite-(Zn), tennantite-(Fe), tennantite-(Zn), tetrahedrite-(Fe), and tetrahedrite-(Zn). Furthermore, annivite is formally discredited.

IMA 19-B: Establishment of the calcioferrite group

Proposal 19-B on the calcioferrite group is accepted. The general formula of minerals belonging to this group is Ca4AB4(PO4)6(OH)4·12H2O, and two subgroups are defined on the basis of the dominant cation at the B site: the calcioferrite subgroup (B = Fe3+: calcioferrite, zodacite), and the montgomeryite subgroup (B = Al: montgomeryite, kingsmountite, fanfaniite). Aniyunwiyaite is discredited as being kingsmountite, which is assigned a triclinic structure with an ideal formula changed to Ca3MnFeAl4(PO4)6(OH)4·12H2O.

NOMENCLATURE PROPOSALS APPROVED IN MAY 2019

Application of the IMA-CNMNC dominant-valency rule to complex mineral compositions

This is special proposal, coauthored by all the officers of the CNMNC and approved by the members of the Commission itself. It is aimed at solving possible troubles in the definition of the ideal end-member formula of a mineral, which may be crucial for the definition of new mineral species. The IMA-CNMNC recommends the use of the dominant-valency rule for mineral nomenclature, because it alone may lead to unambiguous mineral identification. However, the simple application of the dominant-valency rule may sometimes result in unbalanced end-member formulae, due to the occurrence of a coupled heterovalent substitution at two sites along with a heterovalent substitution at a single site. In these cases, it is recommended to use the site total charge approach to identify the dominant root-charge arrangement on which the dominant-constituent rule can be applied.
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Marco E. Ciriotti

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Luca Baralis
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Luca Baralis » ven 24 mag, 2019 14:24

+4 !
Luca (LB)
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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » ven 24 mag, 2019 14:29

4 nuovi minerali italiani!!!

Un bravissimi a Gianluca Odicino e Gianluca Armellino per la nuova aluminosugilite di Cerchiara! Due minerali del gruppo della milarite (laurentthomasite è il secondo) nella stessa Newsletter. Idem per Stefano Magnanelli!

Un superb bravo même a Georges Favreau!

Tra gli autori (soci AMI): Cristian Biagioni, Luca Bindi, Marco Pasero, Fernando Cámara, Ferdinando Bosi, Pietro Vignola, Gan Carlo Parodi e Uwe Kolitsch.

Almeno 167 i proposal presentati nel 2018...
Marco E. Ciriotti

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fabry
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da fabry » ven 24 mag, 2019 15:33

un'altro minerale nuovo dalla mia adorata cerchiara,complimenti a odicino,armellino e a tutti gli altri autori.

odicino
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da odicino » ven 24 mag, 2019 16:35

Il merito è di Mariko Nagashima che si è dedicata ad analizzare una gran quantità di campioni di sugilite (o presunta tale) provenienti da diversi cercatori. Ciò che finora è certo è che tutte le sugiliti di Cerchiara da lei analizzate, di colore diverso dal viola-porpora, sono risultate essere altre fasi (egirine principalmente, fasi miste indecifrabili e una scheelite). Per ora l'unico campione certo è l'olotipo ma confidiamo che lei riesca a identificarne presto degli altri. :wink:
Colgo anche l'occasione per fare i complimenti a Stefano Magnanelli per il nuovo solfato dell'Arsiccio.

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Roberto Bracco
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Roberto Bracco » ven 24 mag, 2019 17:10

Bravi tutti e complimentoni a Stefano!!!
Adesso ci tocca cercare una "vera" sugilite a Cerchiara...
Roberto Bracco - AMI Liguria

Perché seguire il calcio, quando accanto c'è lo scandio e poco più in là il vanadio?

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Antonio Borrelli
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Antonio Borrelli » ven 24 mag, 2019 20:09

Tra le fasi del gruppo della tetrahedrite kenoargentotetrahedrite-(Fe), tennantite-(Zn) e tetrahedrite-(Zn) sono nuove specie o ridenominazioni?
Nel secondo caso, di quali specie?
Antonio

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » ven 24 mag, 2019 20:10

Calcioferrite group

G Calcioferrite Ca4MgFe3+4(PO4)6(OH)4·12H2O mon C2/c 10.1936 24.1959 6.3218 90.00 91.161 90.00 2 calcioferrite subgroup
A Fanfaniite Ca4Mn2+Al4(PO4)6(OH)4·12H2O mon C2/c 10.032 24.162 6.241 90.00 91.47 90.00 2 montgomeryite subgroup
Rd Kingsmountite Ca3Mn2+Fe2+Al4(PO4)6(OH)4·12H2O tric P1 6.255 13.197 19.410 106.817 90.81 90.65 6 montgomeryite subgroup
G Montgomeryite Ca4MgAl4(PO4)6(OH)4·12H2O mon C2 10.023 24.121 6.243 90.00 91.55 90.00 2 montgomeryite subgroup
A Zodacite Ca4Mn2+Fe3+4(PO4)6(OH)4·12H2O mon C2/c, Cc 10.152 24.14 6.308 90.00 91.14 90.00 2 calcioferrite subgroup
Marco E. Ciriotti

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » ven 24 mag, 2019 20:12

Tetrahedrite group

Rn Argentotennantite-(Zn) Ag6[Cu+4Zn2]As4S12S
Rn Argentotetrahedrite-(Fe) Ag6[Cu+4Fe2+2]Sb4S12S
Rn Giraudite-(Zn) Cu6[Cu+4Zn2]As4Se12Se
Rd Goldfieldite Cu6[Cu+4□2]Te4S12S
Rn Hakite-(Hg) Cu6[Cu+4Hg2]Sb4Se12Se
Rn Kenoargentotetrahedrite-(Fe) Ag6[Cu+4Fe2+2]Sb4S12S1-x (ex "freibergite")
Rn Rozhdestvenskayaite-(Zn) Ag6[Ag4Zn2]Sb4S12S
Rn Tennantite-(Fe) Cu6[Cu+4Fe2+2]As4S12S
A Tennantite-(Zn) Cu6[Cu+4Zn2]As4S12S
Rn Tetrahedrite-(Fe) Cu6[Cu+4Fe2+2]Sb4S12S
A Tetrahedrite-(Zn) Cu6[Cu+4Zn2]Sb4S12S

La formula della kenoargentotetrahedrite-(Fe) potrebbe essere diversamente rappresentata con l'inserimento del simbolo di vacanza.
Marco E. Ciriotti

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » sab 25 mag, 2019 11:29

alcaparrosaite group

Alcaparrosaite K3Ti4+Fe3+(SO4)4O(H2O)2
Magnanelliite K3Fe3+2(SO4)4(OH)(H2O)2

welinite group

Barwoodite Mn2+6(Nb5+,☐)2(SiO4)2(O,OH)6
Franciscanite Mn2+6(V5+,☐)2(SiO4)2(O,OH)6
Örebroite Mn2+6(Sb5+,Fe3+)2(SiO4)2(O,OH)6
Scorticoite Mn2+6(Sb5+,☐)2(SiO4)2O3(OH)3
Welinite Mn2+6(W6+,☐)2(SiO4)2(O,OH)6

Con queste nuove approvazioni le specie minerali valide approssimano il numero di 5500.
Marco E. Ciriotti

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donato
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da donato » sab 25 mag, 2019 12:29

▪ Cabella, R., Lucchetti, G., Palenzona, A. (1990): Al-rich, Fe-poor manganoan sugilite in a pectolite-bearing assemblage from Cerchiara mine (Northern Apennines, Italy). Neues Jahrbuch fur Mineralogie Monatshefte, 10, 443-448.

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » sab 25 mag, 2019 13:32

Yes, Donato. L'aluminosugilite, nasce da quel lavoro "preliminare".
Marco E. Ciriotti

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Antonio Borrelli
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Antonio Borrelli » dom 26 mag, 2019 11:48

Marco E. Ciriotti ha scritto:
ven 24 mag, 2019 20:12
Tetrahedrite group

Rn Argentotennantite-(Zn) Ag6[Cu+4Zn2]As4S12S
Rn Argentotetrahedrite-(Fe) Ag6[Ag4Fe2+2]Sb4S12S
Rn Giraudite-(Zn) Cu6[Cu+4Zn2]As4Se12S
Rd Goldfieldite Cu6[Cu+4□2]Te4S12S
Rn Hakite-(Hg) Cu6[Cu+4Hg2]Sb4Se12S
Rn Kenoargentotetrahedrite-(Fe) Ag6[Cu+4Fe2+2]Sb4S12S1-x (ex "freibergite")
Rn Rozhdestvenskayaite-(Zn) Ag6[Ag4Zn2]Sb4S12S
Rn Tennantite-(Fe) Cu6[Cu+4Fe2+2]As4S12S
A Tennantite-(Zn) Cu6[Cu+4Zn2]As4S12S
Rn Tetrahedrite-(Fe) Cu6[Cu+4Fe2+2]Sb4S12S
A Tetrahedrite-(Zn) Cu6[Cu+4Zn2]Sb4S12S
Non mi trovo in accordo con alcune formule confrontate con quelle attualmente nella IMA list.
L'argentotetrahedrite-(Fe) dovrebbe avere Cu+ nella posizione B mentre per giraudite-(Zn) e hakite-(Hg) l'elemento costituente Z dovrebbe essere il selenio.
Antonio

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » dom 26 mag, 2019 12:22

L'IMA List non è ancora aggiornata in seguito alla classificazione del gruppo della tetrahedrite.
Ma hai ragione: un errore da copia incolla con taglio dell'ultima posizione: giraudite-(Zn) e hakite-(Hg) l'elemento costituente Z è il selenio e l'argentotetrahedrite-(Fe) ha Cu+ nella posizione B.

Rn Argentotennantite-(Zn) Ag6[Cu+4Zn2]As4S12S
Rn Argentotetrahedrite-(Fe) Ag6[Cu+4Fe2+2]Sb4S12S
Rn Giraudite-(Zn) Cu+6[Cu+4Zn2]As4Se12Se
Rd Goldfieldite Cu+6[Cu+4□2]Te4S12S
Rn Hakite-(Hg) Cu+6[Cu+4Hg2]Sb4Se12Se
Rn Kenoargnetotetrahedrite-(Fe) Ag6[Cu+4Fe2+2]Sb4S12S1-x oppure (Ag4◻2)Cu+4Fe2+2Sb4S12◻ [occorrerà attendere l'articolo]
Rn Rozhdestvenskayaite-(Zn) Ag6[Ag4Zn2]Sb4S12S
Rn Tennantite-(Fe) Cu+6[Cu+4Fe2+2]As4S12S
Rn Tennantite-(Zn) Cu+6[Cu+4Zn2]As4S12S
Rn Tetrahedrite-(Fe) Cu+6[Cu+4Fe2+2]Sb4S12S
A Tetrahedrite-(Zn) Cu+6[Cu+4Zn2]Sb4S12S


A definite confirmation will have to wait until the publication of the new tetrahedrite-group nomenclature.
Marco E. Ciriotti

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Marco E. Ciriotti
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Re: New minerals and nomenclature approved by IMA CNMNC in April and May 2019

Messaggio da Marco E. Ciriotti » dom 26 mag, 2019 20:37

La località-tipo della kahlenbergite potrebbe essere Giordania e non Israele. Il monte è nella zona di confine e la zona di ritrovamento si direbbe nel versante giordano.
Marco E. Ciriotti

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