General Information:
Chemical Formula:
(Yb,Y)2([ ])Be2Si2O8(OH)2
Composition:
(Molecular Weight = 453.70 gm)
Yttrium 9.80 % Y
Ytterbium 38.14 % Yb
Beryllium 3.97 % Be
Silicon 12.38 % Si
Hydrogen 0.44 % H
Oxygen 35.26 % O
Empirical Formula:
YbY0.5Be2Si2O8(OH)2
Environment:
Found in an amazonite pegmatite on plumbomicrolite and violet fluorite as a product of very late-stage replacement reactions.
IMA Status:
Approved IMA 1987
Locality:
Ploskororskaya, Keivy district, Kola Peninsula, Russia.
Name Origin:
Named for it's relationship to hingganite.
Physical Properties:
Cleavage:
None
Color:
colorless.
Density:
4.83
Diaphaniety:
Transparent
Habits:
Spherical - Spherical, rounded aggregates., Aggregates - Made of numerous individual crystals or clusters., Acicular - Occurs as needle-like crystals.
Hardness:
6-7 - Orthoclase-Quartz
Luster:
Vitreous (Glassy)
Streak:
white
More details...