Yttrocrasite-(Y)
Yttrocrasite-(Y) is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Y,Th,Ca,U)(Ti,Fe)₂(O,OH)₆.
It crystallizes in the orthorhombic crystal system (space group Pbcn). It is a member of the Columbite structural group.
Key properties: Mohs hardness 5.5–6; specific gravity 4.8; Bright pitchy to resinous luster.
IMA symbol Ycr-Y, IMA status: questionable, named in 1906.
Found in granite pegmatite.
The name comes from a dominance of YTTRium in the composition, and the Greek for a mixing, as there are many other elements in addition to yttrium.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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