IMA 2015-087, 2015-088 and 2015-098 = klaprothite, péligotite and ottohahnite

database, nuove specie, discrediti,
ridefinizioni, classificazioni, ecc.
Rispondi
Avatar utente
Marco E. Ciriotti
Messaggi: 31645
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

IMA 2015-087, 2015-088 and 2015-098 = klaprothite, péligotite and ottohahnite

Messaggio da Marco E. Ciriotti » sab 18 giu, 2016 14:35

Prossima pubblicazione.

Referenza:
▪ Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2017): Klaprothite, péligotite and ottohahnite, three new sodium uranyl sulfate minerals with bidentate UO7-SO4 linkages from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 81, (in press).

Abstract:
The new minerals klaprothite (IMA2015-087), Na6(UO2)(SO4)4(H2O)4, péligotite (IMA2015-088), Na6(UO2)(SO4)4(H2O)4, and ottohahnite (IMA2015-098), Na6(UO2)2(SO4)5(H2O)7·1.5H2O, were found in the Blue Lizard mine, San Juan County, Utah, USA, where they occur together as secondary phases. All three minerals occur as yellowish green to greenish-yellow crystals, are brittle with irregular fracture, have Mohs hardness of about 2½ and exhibit bright bluish-green fluorescence, and all are easily soluble in RT H2O. Only klaprothite exhibits cleavage; perfect on {100} and {001}. Quantitative EDS analyses yielded the empirical formulas Na6.01(U 26 1.03O2)(S0.993O4)4(H2O)4, Na5.82(U1.02O2)(S1.003O4)4(H2O)4 and Na5.88(U0.99O2)2(S1.008O4)5(H2O)8.5 for klaprothite, péligotite and ottohahnite, respectively. Their Raman spectra exhibit similar features. Klaprothite is monoclinic, P21/c, a = 9.8271(4), b = 9.7452(3), c = 20.8725(15) Å, β =98.743(7)°, V = 1975.66(17) Å3 and Z = 4. Péligotite is triclinic, P-1, a = 9.81511(18), b =9.9575(2), c = 10.6289(8) Å, α = 88.680(6)°, β = 73.990(5)°, γ = 89.205(6)°, V = 998.22(8) Å3 and Z = 2. Ottohahnite is triclinic, P-1, a = 9.97562(19), b = 11.6741(2), c = 14.2903(10) Å, α = 113.518(8)°, β = 104.282(7)°, γ = 91.400(6)°, V = 1464.59(14) Å3 and Z = 2. The structures of klaprothite (R1 = 2.22%) and péligotite (R1 = 2.28%) both contain [(UO2)(SO4)4]6– clusters in which one SO4 group has a bidentate linkage with the UO7 polyhedron; Na–O polyhedra link clusters into thick heteropolyhedral layers and link layers into frameworks; the structures differ in the configuration of Na-O polyhedra that link the layers. The structure of ottohahnite (R1 = 2.65%) contains [(UO2)4(SO4)10]12– clusters in which each UO7 polyhedron has a bidentate linkage with one SO4 group; Na–O polyhedra link clusters into a thin heteropolyhedral slice and also link the slices into a framework. The minerals are named for Martin Heinrich Klaproth (1743–1817), Eugène-Melchior Péligot (1811–1890) and Otto Hahn (1879–1968).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Avatar utente
Marco E. Ciriotti
Messaggi: 31645
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: IMA 2015-087, 2015-088 and 2015-098 = klaprothite, péligotite and ottohahnite

Messaggio da Marco E. Ciriotti » dom 25 giu, 2017 17:56

Pubblicazione effettuata.

Referenza:
▪ Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2017): Klaprothite, péligotite and ottohahnite, three new sodium uranyl sulfate minerals with bidentate UO7-SO4 linkages from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 81, 753-779.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Rispondi

Chi c’è in linea

Visitano il forum: Nessuno e 16 ospiti