General Information:
Chemical Formula:(Na,Ca)(Mn++,Mg)12[(Si,Al)6O17]2(O,OH)10
IMA Status:Approved IMA 1977
Locality:Iwaizama mine, Saitama Prefecture, Honshu, Japan.
Name Origin:Named for the Taneyama mine.
Physical Properties: Cleavage:[010] Perfect
Color:greenish yellow or grayish yellow.
Density:3.3
Hardness:5 - Apatite
Luster:Vitreous (Glassy)
Streak:light yellow
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