General Information:
Chemical Formula:
Na(Pb,Na,K)2(Ta,Nb,Ti)4As+++4O18
Environment:
In a kaolinized pegmatite.
IMA Status:
Approved IMA 1984
Locality:
St. Ann's mine, Karoi district, SE of Miami, Zimbabwe.
Name Origin:
Named for the country of origin.
Physical Properties:
Cleavage:
[010] Perfect
Color:
yellow brown or honey yellow.
Density:
6.2
Diaphaniety:
Translucent
Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., Tabular - Form dimensions are thin in one direction.,
Hardness:
5-5.5 - Apatite-Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
white
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