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
More details...