General Information:
Chemical Formula:
Pb5Cu2(CO3)(SO4)3(OH)6
Composition:
(Molecular Weight = 1,613.34 gm)
Copper 7.88 % Cu
Hydrogen 0.37 % H
Lead 64.21 % Pb
Carbon 0.74 % C
Sulfur 5.96 % S
Oxygen 20.83 % O
Empirical Formula:
Pb5Cu2(CO3)(SO4)3(OH)6
Environment:
Secondary, weathered zone of lead and copper ores.
Locality:
Mammoth Mine at Tiger, Arizona.
Name Origin:
Named after Caledonia, the historical name of Scotland.
Physical Properties:
Cleavage:
[001] Perfect, [100] Distinct
Color:
blue, blue green, green, or dark green.
Density:
5.7 - 6.4, Average = 6.05
Diaphaniety:
Transparent to Translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Striated - Parallel lines on crystal surface or cleavage face.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
None.
Luster:
Vitreous - Greasy
Streak:
greenish white
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