Ashcroftine-(Y)

General Information:
 Chemical Formula:
K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8·8(H2O)
 IMA Status:
Approved IMA 1987
Physical Properties:
 Cleavage:
[100] Perfect, [001] Distinct
 Color:
light violet or pink.
 Density:
2.61
 Diaphaniety:
Transparent to Translucent
 Luster:
Vitreous - Silky
 Streak:
white
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