General Information:
Chemical Formula:
Mg7Fe+++4O13·10(H2O)
Composition:
(Molecular Weight = 781.67 gm)
Magnesium 21.77 % Mg
Iron 28.58 % Fe
Hydrogen 2.58 % H
Oxygen 47.08 % O
Empirical Formula:
Mg7Fe3+4O13·10(H2O)
Environment:
From a drill core with Mg-Fe-Mn oxides.
IMA Status:
Approved IMA 1969
Locality:
Muskox intrusion, coppermine River area, NWT, Canada.
Name Origin:
Named for the igneous complex (the Muskox intrusion) in which the mineral occurs.
Physical Properties:
Cleavage:
[0001] Perfect
Color:
dark reddish brown or reddish brown.
Density:
3.15 - 3.2, Average = 3.17
Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, Aggregates - Made of numerous individual crystals or clusters.,
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
light orange brown
More details...