Abstract
The structure and properties of anhydrous end members of the garnet family were investigated by quantum mechanical calculations as a function of applied pressure. The results were used to analyze the compression mechanism of the garnet structure. Hydrogrossular and hydropyrope were also studied at ambient and high pressure; the experimentally observed difference in the stability of the hydrogarnet substitution in grossular and pyrope is explained here. In addition, the potential energy surface for magnesium in the pyrope structure is discussed in relation to vibrational properties and to possible cation disorder in pyrope.
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For more information, contact V. Milman, Molecular Simulations, the Quorum, Barnwell Road, Cambridge CB5 8RE, United Kingdom; telephone 44-1223-413300; fax 44-1223-413301; e-mail vmilman@msi-eu.com
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Milman, V., Winkler, B., Nobes, R.H. et al. Garnets: Structure, compressibility, dynamics, and disorder. JOM 52, 22–25 (2000). https://doi.org/10.1007/s11837-000-0156-3
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DOI: https://doi.org/10.1007/s11837-000-0156-3