General Information:
Chemical Formula:
Al6B5O15(F,OH)3
Composition:
(Molecular Weight = 511.93 gm)
Aluminum 31.62 % Al
Boron 10.56 % B
Hydrogen 0.10 % H
Oxygen 48.44 % O
Fluorine 9.28 % F
Empirical Formula:
Al6B5O15F2.5(OH)0.5
Environment:
Granitic pegmatites.
Locality:
Soktujberg, Adun-Tchilon and Baikal, Russia.
Name Origin:
Named after the Russian mineralogist, P. V. Jeremejev (1820-1899).
Physical Properties:
Cleavage:
None
Color:
colorless, white, yellowish white, or bluish white.
Density:
3.28 - 3.31, Average = 3.29
Diaphaniety:
Transparent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
7 - Quartz
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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