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|Section2= |Section3= |Section4= |Section8= }} Calcium fluoride is the inorganic compound with the formula CaF2. It is a colourless insoluble solid. It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities. ==Chemical structure== The compound crystallizes in a cubic motif. Ca2+ centres are eight-coordinate, being centered in a "box" for eight F− centres. Each F− centre is coordinated to four Ca2+ centre.〔G. L. Miessler and D. A. Tarr “Inorganic Chemistry” 3rd Ed, Pearson/Prentice Hall publisher, ISBN 0-13-035471-6.〕 Although perfectly packed crystalline samples are colorless, the mineral is often deeply colored due to the presence of F-centers. 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「calcium fluoride」の詳細全文を読む スポンサード リンク
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