General Information:
Chemical Formula:(Zn,Fe++)(2-2x)(Ti)xAl4O8
Composition:(Molecular Weight = 335.37 gm)Titanium 3.43 %
TiAluminum 32.18 %
AlZinc 15.40 %
ZnIron 10.82 %
FeOxygen 38.17 %
O Empirical Formula: Zn0.79Fe0+0.65Ti0.24Al4O8
Environment:Formed by breakdown of gahnite in diasporites (diaspore-bearting metabauxites) and emeries (corundum-bearing metabauxites).
IMA Status:Approved IMA 1994 (Dana # Added)
Locality:TL: Emory deposit at Kerketefs Mountain, Samos Island, Greece.
Name Origin:Named as the dominant analogue of hâgbomite, found as the 8H and 16H polytypes.
Physical Properties: Cleavage:None
Color:deep brown or black.
Density:4.36
Diaphaniety:Transparent to Opaque
Habits:Euhedral Crystals - Occurs as well-formed crystals showing good external form., Pseudo Tetragonal - Crystals show a tetragonal shape.,
Hardness:7 - Quartz
Luster:Adamantine
Streak:brownish
More details...
