General Information:
Chemical Formula:
Cu(Mg,Cu,Fe,Zn)2Te++++++O6·6(H2O)
Environment:
From a secondary alteration zone.
IMA Status:
Approved IMA (Dana # Added)
Locality:
The dumps of the Centennial Eureka mine, Tintic District, Juab County, Utah, USA.
Name Origin:
For Mr. Joseph F. Leising (1949-), geologist and mineral collector of Reno, Nevada, USA.
Physical Properties:
Cleavage:
[001] Perfect
Color:
yellow or yellowish orange.
Density:
3.41
Diaphaniety:
Transparent to Translucent
Habits:
Platy - Sheet forms (e.g. micas)., Microscopic Crystals - Crystals visible only with microscopes.,
Hardness:
3-4 - Calcite-Fluorite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Silky
Streak:
light yellow
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