Barquillite

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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