General Information:
Chemical Formula:Al6B5O15(F,OH)3
Composition:(Molecular Weight = 511.93 gm)Aluminum 31.62 %
AlBoron 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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