Geology of Ore Deposits

, Volume 51, Issue 7, pp 656–662 | Cite as

The crystal structure of alumoklyuchevskite, K3Cu3AlO2(SO4)4

  • S. V. Krivovichev
  • S. K. Filatov
  • P. N. Cherepansky
Mineralogical Crystallography


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 3 7+ ) 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.


Central Angle Kamchatka Peninsula Shared Edge Average Distortion Langbeinite 


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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • S. V. Krivovichev
    • 1
  • S. K. Filatov
    • 1
  • P. N. Cherepansky
    • 1
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia

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