General Information:
Chemical Formula:
Na2Fe+++2Ti6O16
Composition:
(Molecular Weight = 700.94 gm)
Sodium 6.56 % Na
Titanium 40.98 % Ti
Iron 15.93 % Fe
Oxygen 36.52 % O
Empirical Formula:
Na2Fe3+2Ti6O16
IMA Status:
Approved IMA 1961
Locality:
Mickelsberg, Katzenbuckel, Odenwald, Germany.
Name Origin:
Named for Wilhelm Freudenberg (1881-), German geologist, who studied the rocks of Odenwald, Germany, where the mineral was found.
Physical Properties:
Cleavage:
[001] Good, [010] Good
Color:
brownish black, gray, or black.
Density:
4.3
Diaphaniety:
Transparent to Translucent
Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
Luster:
Vitreous (Glassy)
Streak:
light yellow brown
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