Carbonate-cyanotrichite

General Information: Chemical Formula:Cu++4Al2(CO3,SO4)(OH)12·2(H2O) Composition:(Molecular Weight = 620.53 gm)Aluminum 8.70 % AlCopper 40.96 % CuHydrogen 2.60 % H Carbon 1.28 % C Sulfur 1.76 % S Oxygen 44.71 % O  Empirical Formula: Cu4Al2(CO3)0.66(SO4)0.34(OH)12·2(H2O) Environment:Oxidation weathering product of sulfides. IMA Status:Approved IMA 1963 Locality:Balasauskankyk, in NW Kara-Tau area, Kazakhstan. Name Origin:Named after the composition and structural similarity to cyanotrichite, Greek for "blue hair".Physical Properties: Color:blue, greenish blue, or azure blue. Density:2.65 - 2.67, Average = 2.66 Diaphaniety:Transparent to Translucent Habits:Acicular - Occurs as needle-like crystals., Aggregates - Made of numerous individual crystals or clusters., Hardness:2 - Gypsum Luster:SilkyMore details...