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一起来学地质学丨《普通地质学》(第四版)第二章第三节:常见 ...
常为鳞片状集合体,有时为块状或土状。颜色与条痕均为黑色,可污手。半金属光泽。有一组极完全解理,沿之易劈开成薄片。硬度1~2 (指摩氏硬度,下同),指甲可刻划。有滑感。相对客度2.2。
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