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Contribution to the crystal chemistry of orthorhombic perovskites: MgSiO3 and NaMgF3 |
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| Authors: | M O'Keeffe B G Hyde Jan-Olov Bovin |
| Institution: | 1. Department of Chemistry, Arizona State University, 85281, Tempe, Arizona, USA 2. Research School of Chemistry, The Australian National University, Box 4 P.O., 2600, Canberra A.C.T., Australia 3. Department of Chemistry, Arizona State University, 85281, Tempe, Arizona, USA |
| Abstract: | The structures of MgSiO3 and NaMgF3 are described in terms of the angle ø by which the SiO6 (MgF6) octahedra are rotated from the ideal cubic perovskite structure. The expected effects of temperature and pressure on ø (and hence on the atomic coordinates and volume) are discussed. It is predicted that the effect of pressure will be to decrease the coordination of Mg in MgSiO3. |
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