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The crystal structure of alumoklyuchevskite, K3Cu3AlO2(SO4)4

  • Mineralogical Crystallography
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Abstract

The crystal structure of the unstable mineral alumoklyuchevskite K3Cu3AlO2(SO4)4 [monoclinic, I2, a = 18.772(7), b = 4.967(2), c = 18.468(7) Å, β = 101.66(1)°, V = 1686(1) Å] was refined to R 1 = 0.131 for 2450 unique reflections with F ≥ 4σF hkl. The structure is based on oxocentered tetrahedrons (OAlCu 7+3 ) linked into chains via edges. Each chain is surrounded by SO4 tetrahedrons forming a structural complex. Each complex is elongated along the b axis. This type of crystal structure was also found in other fumarole minerals of the Great Tolbachik Fissure Eruption (GTFE, Kamchatka Peninsula, Russia, 1975–1976), klyuchevskite, K3Cu3Fe3+O2(SO4)4; and piypite, K2Cu2O(SO4)2.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia

    S. V. Krivovichev, S. K. Filatov & P. N. Cherepansky

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  1. S. V. Krivovichev
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  2. S. K. Filatov
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  3. P. N. Cherepansky
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Correspondence to S. V. Krivovichev.

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Original Russian Text © S.V. Krivovichev, S.K. Filatov, P.N. Cherepansky, 2009, published in Zapiski RMO (Proceedings of the Russian Mineralogical Society), 2009, Pt. CXXXVII, No. 2, pp. 114–122.

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Krivovichev, S.V., Filatov, S.K. & Cherepansky, P.N. The crystal structure of alumoklyuchevskite, K3Cu3AlO2(SO4)4 . Geol. Ore Deposits 51, 656–662 (2009). https://doi.org/10.1134/S1075701509070149

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