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简述硬玉的结晶学特征。
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简述硬玉的结晶学特征。
时间:2021-12-27 03:48
关键词:
宝石学
材料科学
答案解析
<p> 硬玉属于辉石族、单斜辉石亚族的矿物,属单斜晶系,基本的晶体结构特征是硅氧四面体通过共用1个顶角相连组成单链,硅氧链与链之间由小阳离子M1和较大阳离子M2构成的八面体和多面体组成的链联结。因此,硅氧链间的结合力要小于链内的结合力,而形成解理。硬玉有平行C轴的两组完全解理,两解理面的夹角为87°,接近90°。通常呈短柱状、柱状、纤维状和不规则粒状的形态。</p>
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