General Information:
Chemical Formula:
(Mn++,Fe++)Al2Si8O24(OH)8
Composition:
(Molecular Weight = 853.86 gm)
Manganese 4.83 % Mn
Aluminum 6.32 % Al
Iron 1.64 % Fe
Silicon 26.31 % Si
Hydrogen 0.94 % H
Oxygen 59.96 % O
Empirical Formula:
Mn3+0.75Fe3+0.25Al2Si8O24(OH)8
IMA Status:
Approved IMA 1969
Locality:
TL: New Zealand, Akatore creek, South Island
Physical Properties:
Cleavage:
[010] Perfect
Color:
orange or brown.
Density:
3.48
Diaphaniety:
Transparent
Hardness:
6 - Orthoclase
Luster:
Vitreous (Glassy)
Streak:
yellow white
More details...