General Information:
Chemical Formula:Ca3(BO3)2
Composition:(Molecular Weight = 355.47 gm)Calcium 33.82 %
CaBoron 12.16 %
B Oxygen 54.01 %
O Empirical Formula: Ca3(BO3)2
Environment:In a vein developed along the boundary between crystalline limestone and gehlenite-spurrite skarn. Ca-analog to kotoite and jotoite.
IMA Status:Approved IMA
Locality:Fuka, Bitchu-Cho, Okayama Prefeture, Japan.
Name Origin:For Prof. Hiroshi Takeda (1934- ) , of the Mineralogial Institute, University of Tokyo.
Physical Properties: Cleavage:[110] Imperfect
Color:white, pale gray, or colorless.
Density:3.1
Diaphaniety:Transparent
Habits:Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
Hardness:4.5 - Between Fluorite and Apatite
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:white
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