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Kristallicheskaya struktura i sravnitel'naya kristallokhimiya romanorlovita  [Crystal structure and comparative crystal chemistry of romanorlovite]

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Alternate Title:Crystal structure and comparative crystal chemistry of romanorlovite
Authors:Zubkova, N. V.; Krivovichev, S. V.; Pekov, I. V.; Zolotarev, A. A.; Pushcharovskiy, D. Yu.; Sidorov, E. G.
Author Affiliations:Primary:
Moskovskiy Gosudarstvennyy Universitet, Moscow, Russian Federation
Volume Title:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva Proceedings of the Russian Mineralogical Society
Source:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva = Proceedings of the Russian Mineralogical Society, 145(4), p.92-102. Publisher: Nauka, St. Petersburg, Russian Federation. ISSN: 0869-6055
Publication Date:2016
Note:In Russian with English summary. 18 refs.; illus., incl. 3 tables
Summary:Crystal structure and crystal chemical features of a new, discovered in fumaroles of the Tolbachik Volcano (Kamchatka) copper and potassium hydroxychloride-romanorlovite, with the simplified formula K11Cu9Cl25(OH)4 · 2H2O (Z = 4), are reported. The mineral is tetragonal, I4/mmm. The structure was determined using single-crystal XRD data and refined to R = 5.49% for 769 unique reflections. The structure is based on two main blocks built by Cu2+-centered polyhedra. The first one includes chains consisting of edge-sharing CuCl4(OH)2 octahedra. In the chain a fragment built by four edge-sharing Cu(1)-centered octahedra could be distinguished, whereas Cu(2)-centered octahedra are connected with this fragment from both upper and lower sides. The second structural block consists of isolated Cu6Cl18 clusters built by Cu(3)-centered tetragonal pyramids and Cu(4)-centered distorted tetrahedra. In a core of the cluster Cu2+ and Pb2+ cations statistically replacing each other in the same site are located. Two of these basic structural blocks are connected via distorted ACl6 octahedra (A = Cu, K) forming pseudo-framework. K+ cations are located in the voids and channels of the pseudo-framework. Various defects revealed in its structure are discussed.
Subjects:Crystal chemistry; Crystal structure; Fumaroles; Hydroxides; Oxides; X-ray diffraction data; Asia; Commonwealth of Independent States; Kamchatka Peninsula; Kamchatka Russian Federation; Russian Federation; Tolbachik; Hydroxychloride; Romanorlovite
Record ID:698114-7
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data supplied by ICSTI, Moscow, Russian Federation
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