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Crystal structure of synthetic LiScSiO4 olivine and comparison with isotypic Mg2SiO4
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August 25, 2010
Abstract
The crystal structure of LiScSiO4 olivine (Pbnm; a = 4.8214(7), b = 10.444(1), c = 5.9729(9) Å) has been determined and refined with anisotropic thermal parameters to an unweighted disagreement factor of 0.016. Lithium occupies the M1 site and Sc the M2 site. A comparison with isotopic MggSiO4 allows recognition of structure modifications due primarily to a change of the formal charge on the octahedral cations. Important features are (1) large changes in tetrahedral geometry due to interaction of Sc3+ and Si across a shared adge; (2) uniform increase in Li—O distances compared to Mg—O distances in the M1 site due to larger Li1+; (3) both increases and decreases of bond distances of the M2 octahedron relative to those in Mg2SiO4.
Published Online: 2010-08-25
Published in Print: 1978
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Articles in the same Issue
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- Oriented transformation of malachite into tenorite
- Complexes for crystallographic point groups, rod groups and layer groups
- How many faces has the largest space-filling polyhedron?
- The intermediate plagioclase feldspars: an example of a structural resonance
- Darstellung und kristallographische Daten von Orthoboraten (SE)2Ca3[BO3]4
- Die Kristallstruktur eines Kalium-Strontium-Azidhydrates K2,24Sr1,34(N3)4,92(H2O)6,l6
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- Crystal data of tri-sodium hydrogen sulphate
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