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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