IMA 2017-062 = stöfflerite

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Marco E. Ciriotti
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IMA 2017-062 = stöfflerite

Messaggio da Marco E. Ciriotti » gio 10 set, 2020 11:24

Prossima pubblicazione.

Referenza:
▪ Tschauner, O., Ma, C., Spray, J.G., Greenberg, E., Prakapenka, V.B. (2021): Stöfflerite, (Ca,Na)(Si,Al)4O8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856. American Mineralogist, 106, (in press).
Marco E. Ciriotti

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

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Marco E. Ciriotti
Messaggi: 27902
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: IMA 2017-062 = stöfflerite

Messaggio da Marco E. Ciriotti » dom 04 apr, 2021 12:02

Pubblicazione effettuata.

Referenza:
▪ Tschauner, O., Ma, C., Spray, J.G., Greenberg, E., Prakapenka, V.B. (2021): Stöfflerite, (Ca,Na)(Si,Al)4O8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856. American Mineralogist, 106, 650-655.

Abstract:
We present the crystal structure, composition, and occurrence of stöfflerite, the naturally occurring Ca-aluminosilicate with hollandite-type structure. Stöfflerite is a high-pressure polymorph of anorthite and an approved mineral. The type material was found in the shergottitic martian meteorite Northwest Africa 856. Type stöfflerite (Sto60Lin40) assumes space group I4/m with unit-cell dimensions a = 9.255(1) Å, c = 2.742(3) Å, V = 235.1(2) Å3, and Z = 2.
Marco E. Ciriotti

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