单词 | penninite |
释义 | penninite [`pen·ǝ´nīt] MINERALOGY (Mg,Fe,Al)6(Si,Al)4O11(OH)8 An emerald-green, olive-green, pale-green, or bluish mineral of the chlorite group crystallizing in the monoclinic system, with a hardness of 2-2.5 on Mohs scale, and specific gravity of 2.6-2.85. |
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