Barquillite

General Information: Chemical Formula:Cu2CdGeS4 Composition:(Molecular Weight = 440.38 gm)Cadmium 25.53 % CdCopper 28.86 % CuGermanium 16.49 % GeSulfur 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:MetallicMore details...