释义 |
prehn·ite \ˈprāˌnīt, ˈpreˌ-\ noun (-s) Etymology: German prehnit, from Col. Van Prehn 18th century Dutch officer who brought it from the Cape of Good Hope + German -it -ite (I) : a pale green mineral Ca2Al2Si3O10(OH)2 that occurs in crystalline aggregates having a botryoidal or mamillary structure but only rarely in distinct crystals and that is a basic calcium aluminum silicate (hardness 6-6.5, specific gravity 2.80-2.95) |