General Information:
Chemical Formula:
Pb2Cu4Bi(VO4)4(OH)3·8(H2O)
Composition:
(Molecular Weight = 1,532.47 gm)
Vanadium 13.30 % V
Copper 16.59 % Cu
Bismuth 13.64 % Bi
Hydrogen 1.25 % H
Lead 27.04 % Pb
Oxygen 28.19 % O
Empirical Formula:
Pb2Cu4Bi(VO4)4(OH)3·8(H2O)
Environment:
Au-bearing quartz veins cutting Precambrian greenstones.
IMA Status:
Approved IMA 1980
Locality:
5 km SW of Payson, at Lousy Gulch, Gila County, Arizona, USA.
Name Origin:
Named for J. E. DuHamel, geologist, Phelps Dodge Corp., who found the mineral.
Physical Properties:
Color:
greenish yellow or olive green.
Density:
5.8
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
Hardness:
3 - Calcite
Streak:
yellow green
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