Carbonate-cyanotrichite

General Information:
 Chemical Formula:
Cu++4Al2(CO3,SO4)(OH)12·2(H2O)
 Composition:
(Molecular Weight = 620.53 gm)
Aluminum 8.70 % Al
Copper 40.96 % Cu
Hydrogen 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:
Silky
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