Yftisite-(Y)

General Information:
 Chemical Formula:
(Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6
 IMA Status:
Discredited IMA 1987
Physical Properties:
 Cleavage:
None
 Color:
yellow.
 Density:
3.96
 Diaphaniety:
Transparent
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luster:
Vitreous - Greasy
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