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yttrocrasite

noun
yt·​tro·​cra·​site
plural -s

Definition of yttrocrasite 

: 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)

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History and Etymology for yttrocrasite

yttrium +-o- + cras- (from Greek krasis mixing, combination) + -ite

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