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titanate
In chemistry, titanate usually refers to inorganic compounds composed of titanium oxides. In some cases, the term is used more generally for any titanium-containing anion, e.g. ()2− and ()2−. This article focuses on the oxides.
Many kinds of titanium oxides are known, and some are commercially important. Typically these materials are white, diamagnetic, high-melting, and insoluble in water. They are often prepared at high temperatures, e.g. using tube furnaces, from titanium dioxide. In virtually all cases, titanium achieves octahedral coordination geometry.〔.〕
==Orthotitanates==
Orthotitanates have the formulae M2TiO4 where M is divalent. An example of such a material is the magnesium titanate (Mg2TiO4), which adopts the spinel structure. Li2TiO3 is not considered a titanate since it adopts the rock-salt structure, and does not feature an identifiable titanium anion. Orthotitanates almost never feature identifiable TiO44− centres, an exception being Ba2TiO4.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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