Arcanite from fumarole exhalations of the Tolbachik Volcano (Kamchatka, Russia) and its crystal structure

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Marco E. Ciriotti
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Arcanite from fumarole exhalations of the Tolbachik Volcano (Kamchatka, Russia) and its crystal structure

Messaggio da Marco E. Ciriotti » ven 27 apr, 2018 12:39

Referenza:
▪ Zubkova, N.V., Pekov, I.V., Ksenofontov, D.A., Yapaskurt, V.O., Pushcharovsky, D.Yu., Sidorov, E.G. (2018): Arcanite from Fumarole Exhalations of the Tolbachik Volcano (Kamchatka, Russia) and Its Crystal Structure. Doklady Earth Sciences, 479, 339-341.

Abstract:
The crystal structure (R = 0.0194) of arcanite β-K2SO4 was studied on a single crystal from exhalations of the Arsenatnaya fumarole, Tolbachik Volcano (Kamchatka, Russia). The mineral crystallizes at a temperature of ≥350–430°C and associates with langbeinite, aphthitalite, hematite, tenorite, johillerite, and others. Arcanite is orthorhombic, Pnma, a = 7.4763(2) Å, b = 5.77262(16) Å, c = 10.0630(3) Å, V = 434.30(2) Å3, Z = 4. Its structure contains isolated SO4 tetrahedra, whereas K cations center ten- and nine-fold polyhedra.
Marco E. Ciriotti

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