staurolite

所属栏目：矿物学专业术语

Definition: A brown glassy mineral that occurs as hexagonal prisms often twinned in theshape of a cross. It consists of a silicate of aluminium and iron.十字石shí zì shíFormula:(Fe,Mg,Zn)2Al9(Si,Al)4O20(OH)4Origin:early 19th century:from Greek stauros “cross ......（本文共 439 字 ）     [阅读本文] >>


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