General Information:
Chemical Formula:
Y3Si3O10F
Composition:
(Molecular Weight = 529.97 gm)
Yttrium 50.33 % Y
Silicon 15.90 % Si
Oxygen 30.19 % O
Fluorine 3.58 % F
Empirical Formula:
Y3Si3O10F
Environment:
"Amazonite" (microcline) pegmatites.
IMA Status:
Approved IMA (Dana # Added)
Locality:
Ploskaya Mountain, western Keiv, Kola Peninsula, Russia.
Name Origin:
Named as the F analog of thalenite-(Y).
Physical Properties:
Cleavage:
None
Color:
colorless or white.
Density:
4.24
Diaphaniety:
Translucent
Habits:
Disseminated - Occurs in small, distinct particles dispersed in matrix., Euhedral Crystals - Occurs as well-formed crystals showing good external form.,
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
white
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