A black, dark brown, or greenish black mineral of the mica group, occurring in many igneous and metamorphic rocks, typically as tabular hexagonal…
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| 单词 | θ6952 |
| 释义 | the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > mica > biotite (7) biotite1848 A black, dark brown, or greenish black mineral of the mica group, occurring in many igneous and metamorphic rocks, typically as tabular hexagonal… manganophyllite1877 A variety of biotite containing manganese, occurring as thin reddish scales. Subcategories:— varieties (5) |
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