IMA 2021-088 = bolotinaite

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Marco E. Ciriotti
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IMA 2021-088 = bolotinaite

Messaggio da Marco E. Ciriotti » mer 10 ago, 2022 13:30

Prossima pubblicazione.

Referenza:
▪ Chukanov, N.V., Zubkova, N.V., Schäfer, C., Pekov, I.V., Shendrik, R.Yu., Vigasina, M.F., Belakovskiy, D.I., Britvin, S.N., Yapaskurt, V.O., Pushcharovsky, D.Yu. (2022): Bolotinaite, (Na6K□)(Al6Si6O24)F⋅4H2O, a new sodalite-group mineral from the Eifel paleovolcanic region, Germany. Mineralogical Magazine, 86, (in press).

Abstract:
The new sodalite-group mineral bolotinaite, ideally (Na6K)(Al6Si6O24)F·4H2O, was discovered in a volcanic ejectum of trachitoid sanidinite collected from the In den Dellen (Zieglowski) pumice quarry, Laach Lake (Laacher See) paleovolcano, Eifel region, RhinelandPalatinate, Germany. The associated minerals are sanidine, nepheline, annite, and zircon. Bolotinaite occurs as isolated interpenetration prismatic twins on (111) up to 1.3 mm long, complex twins, and rare non-twinned rhombic dodecahedra up to 0.2 mm across. The colour of bolotinaite is pale yellow to pinkish coloured, the streak is white, and the lustre is vitreous. Weak orange-yellow fluorescence under longwave UV radiation ( = 330 nm) is due to the presence of trace amounts of the S2•– radical anion. Bolotinaite is brittle, with the Mohs’ hardness of 5. No cleavage is observed. The fracture is uneven. D(meas) = 2.27(2) g·cm–3, D(calc) = 2.291 g·cm–3. Bolotinaite is optically isotropic, with n = 1.488(2) ( = 589 nm). The chemical composition is (wt.%, electron microprobe, CO2 determined by quantitative IR spectroscopy analysis, H2O calculated from the empirical formula with four H2O molecules per formula unit): Na2O 18.30, K2O 3.87, CaO 0.57, Al2O3 28.85, SiO2 37.97, CO2 1.66, SO3 1.37, F 1.60, Cl 0.57, 2.22, H2O 7.21, –O≡(F,Cl) –0.80, total 101.17. The empirical formula is (Na5.92K0.82Ca0.10H0.08)(Si6.33Al5.67O24)(SO4)0.17F0.84Cl0.16(H2O)3.96(CO2)0.38. A high content of H2O and the presence of CO2 molecules and H cations as well as trace amounts of S2•– are confirmed by means of infrared and Raman spectroscopy. The crystal structure was determined using single-crystal X-ray diffraction data and refined to R = 0.0335. Bolotinaite is cubic, space group I-43m. with a = 9.027 (1) Å, V = 735.7 (2) Å3, and Z = 1. The strongest lines of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are: 6.36 (47) (110), 4.502 (10) (200), 3.679 (100) (211), 2.851 (28) (310), 2.603 (29) (222), 2.126 (18) (330). The mineral is named in honour of the Russian crystallographer and crystal chemist Dr. Nadezhda Borisovna Bolotina (b. 1949).

NdR: Sodalite group
Bicchulite [Ca8(OH)8](Al8Si4O24)
Bolotinaite (Na7□)(Al6Si6O24)F∙4H2O
Danalite Be3Fe2+4(SiO4)3S
Genthelvite Be3Zn4(SiO4)3S
Haüyne Na3Ca(Si3Al3)O12(SO4)
Helvine [Mn2+8S2](Be6Si6O24)
Lazurite Na7Ca(Al6Si6O24)(SO4)(S3)–⋅H2O
Nosean [Na8(SO4)(H2O)][(Si6Al6O24)
Sapozhnikovite Na8(Al6Si6O24)(HS)2
Slyudyankaite Na28Ca4(Si24Al24O96)(SO4)6(S6)0.33(CO2)∙2H2O
Sodalite Na4(Al3Si3O12)Cl
Tsaregorodtsevite [N(CH3)4]2(Si10Al2O24)
Tugtupite [Na8Cl2](Al2Be2Si8O24)
Valleyite Ca4(Fe3+6O12)O
Vladimirivanovite Na6Ca2[Al6Si6O24](SO4,S3,S2,Cl)2·H2O
Marco E. Ciriotti

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

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Marco E. Ciriotti
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Re: IMA 2021-088 = bolotinaite

Messaggio da Marco E. Ciriotti » sab 17 dic, 2022 12:01

Pubblicazione effettuata.

Referenza:
▪ Chukanov, N.V., Zubkova, N.V., Schäfer, C., Pekov, I.V., Shendrik, R.Yu., Vigasina, M.F., Belakovskiy, D.I., Britvin, S.N., Yapaskurt, V.O., Pushcharovsky, D.Yu. (2022): Bolotinaite, (Na6K□)(Al6Si6O24)F⋅4H2O, a new sodalite-group mineral from the Eifel paleovolcanic region, Germany. Mineralogical Magazine, 86, 920-928.
Marco E. Ciriotti

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

giuseppe daniele
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Iscritto il: ven 18 feb, 2011 23:35

Re: IMA 2021-088 = bolotinaite

Messaggio da giuseppe daniele » mer 25 gen, 2023 1:43

Ciao Marco! Mi puoi mandare la descrizione-tipo originale di questo minerale? Ciao.
Giuseppe Daniele

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Marco E. Ciriotti
Messaggi: 30235
Iscritto il: ven 25 giu, 2004 11:31
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Re: IMA 2021-088 = bolotinaite

Messaggio da Marco E. Ciriotti » mer 25 gen, 2023 11:13

Ciao Giuseppe,
non ho questo testo. Mi dispiace. Proverò a chiederlo a Nikita.
Marco E. Ciriotti

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

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Marco E. Ciriotti
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Re: IMA 2021-088 = bolotinaite

Messaggio da Marco E. Ciriotti » mer 25 gen, 2023 13:56

Fatto Giuseppe!
Fabio Tosato è stato gentilissimo e molto attento e mi ha passato il testo che ho appena passato a te.
Buon lavoro!
Marco E. Ciriotti

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