释义 |
pen·ni·nite \ˈpenəˌnīt\ noun also pen·nine \ˈpenə̇n, -ˌnīn\ (-s) Etymology: penninite from German pennin (from Pennine Alps) + English -ite; pennine from German pennin : a mineral approximately (Mg,Fe,Al)6(Si,Al)4O11(OH)8 of the chlorite group consisting of a basic aluminosilicate of magnesium, iron, and aluminum, that is monoclinic and is commonly emerald or olive green (hardness 2.-2.5, specific gravity 2.6-2.85) |