Mammothite

General Information:
 Chemical Formula:
Pb6Cu4AlSb+++++O2(SO4)2Cl4(OH)16
 Composition:
(Molecular Weight = 2,284.17 gm)
Aluminum 1.18 % Al
Copper 11.13 % Cu
Antimony 5.33 % Sb
Hydrogen 0.71 % H 
Lead 54.43 % Pb
Sulfur 2.81 % S 
Chlorine 6.21 % Cl
Oxygen 18.21 % O 
 Empirical Formula:
Pb6Cu4AlSbO2(SO4)2(Cl)4(OH)16
 Environment:
Secondary lead mineral.
 IMA Status:
Approved IMA 1985
 Locality:
Mammoth vein, Tiger, Arizona, USA and from Laurium, Attika, Greece.
 Name Origin:
Named for the locality.
Physical Properties:
 Cleavage:
[010] Distinct
 Color:
bright blue, greenish blue, or pale blue.
 Density:
5.25
 Habits:
Microscopic Crystals - Crystals visible only with microscopes., Tabular - Form dimensions are thin in one direction., Acicular - Occurs as needle-like crystals.
 Hardness:
3 - Calcite
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
pale blue
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