General Information:
Chemical Formula:
Cu6Al(SO4)(OH)12Cl·3(H2O)
Composition:
(Molecular Weight = 797.91 gm)
Aluminum 3.38 % Al
Copper 47.78 % Cu
Hydrogen 2.27 % H
Sulfur 4.02 % S
Chlorine 4.44 % Cl
Oxygen 38.10 % O
Empirical Formula:
Cu6Al(SO4)(OH)12Cl·3(H2O)
Name Origin:
Named after N. Spang, USA.
Physical Properties:
Cleavage:
[0001] Perfect
Color:
blue green, green, dark green, or emerald green.
Density:
3.1
Diaphaniety:
Transparent to Translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Platy - Sheet forms (e.g. micas)., Tabular - Form dimensions are thin in one direction.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
light green
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