Abstract
A new basic copper sulfamate Cu3(OH)5[SO3(NH2)] of anthropogenic origin from the oxidation zone of the Murzinskoe gold deposit (Altai Krai, Russia) has been characterized with XRD and IR spectroscopy. This compound has no natural or synthetic analogues and represents a novel structure type. It is monoclinic, with a space group P21/c; a = 7.5817(4), b = 5.9823(3), c = 17.0084(8) Å, β = 99.140(5)°; V = 761.63(7) Å3, Z = 4. The crystal structure of this sulfamate (R = 4.91%) is based on distorted brucite-type layers composed of Cu2+-centred octahedra of three different types: CuO2(OH)4, Cu(OH)6 and CuO(OH)5. SO3NH2 tetrahedra isolated from each other are linked to the layers from both sides. The neighboring heteropolyhedral layers formed by Cu-centered octahedra and SO3NH2 tetrahedra are connected via a system of hydrogen bonds.
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ACKNOWLEDGMENTS
Powder X-ray diffraction study of copper sulfamate was carried out on the equipment of the resource center X-ray Diffraction Methods of Research, St. Petersburg State University. The work was performed using an XCaliburS CCD diffractometer (Moscow State University).
Funding
Mineralogical and structural studies were supported by the Russian Science Foundation (project no. 19-17-00050 for N.V. Zubkova, I.V. Pekov, and D.Yu. Pushcharovsky).
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Translated by A. Bobrov
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Zubkova, N.V., Pekov, I.V., Chukanov, N.V. et al. A New Sulfamate Cu3(OH)5[SO3(NH2)]: A Product of the Anthropogenic Alteration of Copper Sulfides. Moscow Univ. Geol. Bull. 77, 617–622 (2022). https://doi.org/10.3103/S0145875222060163
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DOI: https://doi.org/10.3103/S0145875222060163