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staurolite
基礎(chǔ)科學(xué)

        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）     [閱讀本文] >>

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