Abstract
Single-crystalline cooperite (PtS) with a nearly stoichiometric composition was characterized in detail by X-ray diffraction, electron-probe X-ray microanalysis, and high-resolution scanning electron microscopy. For the first time it was demonstrated that 195Pt static and MAS NMR spectroscopy can be used for studying natural platinum minerals. The 195Pt chemical-shift tensor of cooperite was found to be consistent with the axial symmetry and is characterized by the following principal values: δ xx = −5920 ppm, δ yy = −3734 ppm, δ zz = +4023 ppm, and δiso = −1850 ppm. According to the ESR data, the samples of cooperite contain copper(II), which is adsorbed on the surface during the layer-by-layer crystal growth and is not involved in the crystal lattice.
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Original Russian Text © V.I. Rozhdestvina, A.V. Ivanov, M.A. Zaremba, O.N. Antsutkin, W. Forsling, 2008, published in Kristallografiya, 2008, Vol. 53, No. 3, pp. 423–430.
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Rozhdestvina, V.I., Ivanov, A.V., Zaremba, M.A. et al. Single-Crystalline cooperite (PtS): Crystal-Chemical characterization, ESR spectroscopy, and 195Pt NMR spectroscopy. Crystallogr. Rep. 53, 391–397 (2008). https://doi.org/10.1134/S106377450803005X
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DOI: https://doi.org/10.1134/S106377450803005X