General Information:
Chemical Formula:
(Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2(Si2O7)2O2(OH,F)2
Physical Properties:
Cleavage:
[010] Distinct
Color:
reddish brown.
Density:
3.6
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
light brown
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