Single-Crystalline cooperite (PtS): Crystal-Chemical characterization, ESR spectroscopy, and 195Pt NMR spectroscopy
Autor: | Willis Forsling, Alexander V. Ivanov, O. N. Antsutkin, V. I. Rozhdestvina, M. A. Zaremba |
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Rok vydání: | 2008 |
Předmět: | |
Zdroj: | Crystallography Reports. 53:391-397 |
ISSN: | 1562-689X 1063-7745 |
Popis: | 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: δxx = −5920 ppm, δyy = −3734 ppm, δzz = +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. |
Databáze: | OpenAIRE |
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