Arcanite from Fumarole Exhalations of the Tolbachik Volcano (Kamchatka,Russia) and Its Crystal Structure |
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| Authors: | N. V. Zubkova I. V. Pekov D. A. Ksenofontov V. O. Yapaskurt D. Yu. Pushcharovsky E. G. Sidorov |
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| Affiliation: | 1.Moscow State University,Moscow,Russia;2.Institute of Volcanology and Seismology, Far East Branch,Russian Academy of Sciences,Petropavlovsk-Kamchatsky,Russia |
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| 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. |
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