General Information:
Chemical Formula:(Mn,Ca)(Ti,Nb)5O12·9(H2O)
Physical Properties:
Cleavage:[???] Perfect
Color:brownish black or pink brown.
Density:2.4 - 2.5, Average = 2.45
Diaphaniety:Translucent to Opaque
Hardness:2-2.5 - Gypsum-Finger Nail
Luster:Vitreous - Greasy
Streak:light brown
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