Abstract
FOUR-FOLD co-ordination of titanium has not been reported, either in inorganic titanates or in titanium oxides. Titanium is generally present as TiO6 octahedra, although five-fold co-ordination has been reported in a few cases1. However, a study of titanium-bearing garnets led me to the conclusion that titanium (Ti) replaces silicon (Si), at least in part, and thus is four-fold co-ordinated in the garnet structure2,3.
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References
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TARTE, P. Infra-Red Spectroscopic Evidence of Four-fold Co-ordination of Titanium in Barium Orthotitanate. Nature 191, 1002–1003 (1961). https://doi.org/10.1038/1911002a0
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DOI: https://doi.org/10.1038/1911002a0
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