Abstract
Natural Wolframite, (Fe x Mn1−x )WO4 withx=0.95 to 0.41, obtained from seven different sites of two quartz-wolframites deposits of Degana and Sirohi in Rajasthan. India, have been studied by Mössbauer spectroscopy down to 20 K. X-ray diffraction studies with a monochromatic Cu radiation (λKa-1.5405 Å), were carried out to determine the value ofx. The Mössbauer spectra of all seven samples were recored at 300, 200, 100, 50, 40, 30 and 20 K, and were least square fitted for different sites. The Mössbauer parameters are attributed to a high spin ferrous ion in a quite distorted octahedral symmetry, and only one sextet has been resolved below transition temperature.
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Saini, J.S., Garg, V.K. & Chandra, K. Mössbauer study of natural wolframites. Hyperfine Interact 67, 453–458 (1991). https://doi.org/10.1007/BF02398184
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DOI: https://doi.org/10.1007/BF02398184