N a black or dark green mineral of the mica group, found in igneous and metamorphic rocks. Composition: hydrous magnesium iron potassium aluminium silicate. Formula: K(Mg,Fe)3(Al,Fe)Si3O10(OH)2. Crystal structure: monoclinic 黑云母[1]
biotite eucrite 黑云倍长辉长岩
biotite quartzklausenite 云英苏斜岩
biotite jacupirangite 黑云铁霞辉岩
biotite nelsonite 黑云钛铁磷灰岩
biotite polzenite 黑云黄玄岩
biotite hornblendite 黑云角闪石岩
biotite alnoite 黑云黄长煌斑岩
biotite mangerite 云辉二长岩
biotite e 黑云母[1]