Synthesis and optical absorption spectra of Cr2+-containing orthosilicates |
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Authors: | Barry E. Scheetz William B. White |
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Affiliation: | (1) Materials Research Laboratory and Department of Geosciences, The Pennsylvania State University, 16802 University Park, Pa., USA |
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Abstract: | By reacting chromium metal with appropriate oxides in a neutral atmosphere at high temperature it is possible to prepare Mg2SiO4 with the olivine structure containing Cr++ and also Cr2SiO4. X-ray powder diffraction data for chromous orthosilicate may be indexed on an orthorhombic cell with a=5.690, b=11.262, and c=9.584 Å. The compound is not isotructural with olivine. Optical absorption spectra of Cr2+ in both hosts have been obtained and also indicate large differences between the two structures. |
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