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Keilhauite Keilhauite (also known as ''yttrotitanite'') is a variety of the mineral titanite of a brownish black color, related to titanite in form. It consists chiefly of silicon dioxide, titanium dioxide, calcium oxide, and yttrium oxide. Keilhauite has a chemical formula of (CaTi,Al2,Fe23+,Y23+)SiO5. It differs from titanite only in that calcium is substituted by up to 12 percent (Y,Ce)2O3. ==References==
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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「Keilhauite」の詳細全文を読む
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