| 释义 |
yt·tro·cra·site
\ˌ ̷ ̷ ̷ ̷ˈkrāˌsīt\ noun
(-s)
Etymology: yttrium +-o- + cras- (from Greek krasis mixing, combination) + -ite — more at crasis
: a mineral approximately (Y,Th,U,Ca)2(Ti,Fe,W)4O11 or (Y,Th,U,Ca)(Ti,Fe,W)2O5(OH) consisting of an oxide or basic oxide of the yttrium metals, thorium, uranium, titanium, iron, and tungsten and occurring in pitchy-black orthorhombic crystals (hardness 5.5-6, specific gravity 4.8) |