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Barium metaphosphate is an inorganic substance with the molecular formula Ba(PO3)2. It is a colourless solid that is insoluble in water. X-ray crystallography shows that this material is composed of Ba2+ cations attached to a polyphosphate ((PO3−)n) anion.〔"Form of barium metaphosphate" Grenier, Jean C.; Martin, Claude M.; Durif, Andre; Tran Qui Duc; Guitel, J. C. Bulletin de la Societe Francaise de Mineralogie et de Cristallographie (1967), vol. 90, 24-31.〕 A number of hydrated forms are known which are actually cyclic metaphosphates, Ba2(P4O12)·3.5H2O, Ba3(P3O9)2·6H2O. ==Preparation== Barium metaphosphate can be prepared by the reaction of barium carbonate with metaphosphoric acid:〔- :BaCO3 + 2HPO3 → Ba(PO3)2 +CO2 +H2O or alternatively by the aqueous reaction of barium chloride and sodium metaphosphate:〔- BaCl2(aq) + 2NaPO3(aq) → Ba(PO3)2 + 2NaCl 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「barium metaphosphate」の詳細全文を読む スポンサード リンク
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