General Information:
Chemical Formula:
(Y,Th,Ca,U)(Ti,Fe+++)2(O,OH)6
Environment:
Precambrian granites, pegmatites, and metamorphic rocks. A doubtful mineral.
IMA Status:
Approved IMA 1987
Locality:
Three miles east of Barringer Hill, Llano Co. in Burnet Co., Texas, USA.
Name Origin:
From the Greek for "mixture", because it is a mixture fo yttrium with many other elements.
Physical Properties:
Cleavage:
None
Color:
black.
Density:
4.8
Diaphaniety:
Opaque
Habits:
Metamict - Mineral originally crystalline, now amorphous due to radiation damage., ,
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Resinous
Streak:
reddish brown
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