General Information:
Chemical Formula:
Cu2CdGeS4
Composition:
(Molecular Weight = 440.38 gm)
Cadmium 25.53 % Cd
Copper 28.86 % Cu
Germanium 16.49 % Ge
Sulfur 29.13 % S
Empirical Formula:
Cu2CdGeS4
Environment:
The cadmium dominant analog of briartite. A member of the Stannite group.
IMA Status:
Approved IMA 1996 (Dana # Added)
Locality:
Fuentes Villanas mine, Barquilla Sn-Ge-Cd-Cu-Fe vein-type deposit, southwestern Salamanca, Spain.
Name Origin:
Named after Barquilla, a village near the discovery locality.
Physical Properties:
Color:
gray.
Diaphaniety:
Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Platy - Sheet forms (e.g. micas)., Rosette - Bundled tabular aggregates resembling rose flower petals.
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Metallic
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