General Information:
Chemical Formula:
Y2([ ])Be2Si2O8(OH)2
Composition:
(Molecular Weight = 414.02 gm)
Yttrium 42.95 % Y
Beryllium 4.35 % Be
Silicon 13.57 % Si
Hydrogen 0.49 % H
Oxygen 38.64 % O
Empirical Formula:
Y2Be2Si2O8(OH)2
Environment:
In a Be-and REE-bearing granophyre in Manchuria, China.
IMA Status:
Approved IMA 1987
Locality:
Heilonghiang, and greater Khingan area, Manchuria, China.
Name Origin:
Named for it's locality.
Physical Properties:
Cleavage:
None
Color:
green, yellow brown, white, light blue, or light yellow.
Density:
4.83
Diaphaniety:
Transparent
Habits:
Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat., Aggregates - Made of numerous individual crystals or clusters.,
Hardness:
6-7 - Orthoclase-Quartz
Luster:
Vitreous (Glassy)
Streak:
white
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