General Information:
Chemical Formula:
PbCu(VO4)(OH)
Composition:
(Molecular Weight = 402.69 gm)
Vanadium 12.65 % V
Copper 15.78 % Cu
Hydrogen 0.25 % H
Lead 51.45 % Pb
Oxygen 19.87 % O
Empirical Formula:
PbCu(VO4)(OH)
Name Origin:
From its locality at Mottram, St. Andrews, Cheshire, England.
Physical Properties:
Cleavage:
None
Color:
brown, brown red, brownish black, green, or dark green.
Density:
5.9 - 6, Average = 5.95
Diaphaniety:
Transparent to Opaque
Habits:
Plumose - "Mica-like" minerals forming aggregates of plume-like forms., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Encrustations - Forms crust-like aggregates on matrix.
Hardness:
3.5 - Copper Penny
Luster:
Greasy (Oily)
Streak:
light brownish green
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