General Information:
Chemical Formula:
(Zn,Cu)4(SO4)(OH)6·4(H2O)
Composition:
(Molecular Weight = 528.04 gm)
Zinc 24.77 % Zn
Copper 24.07 % Cu
Hydrogen 2.67 % H
Sulfur 6.07 % S
Oxygen 42.42 % O
Empirical Formula:
Zn2Cu2(SO4)(OH)6·4(H2O)
Environment:
Encrusting hydrozincite.
IMA Status:
Approved IMA 1981
Locality:
Averllyn lead mine, Llanrwst mining district, northern Wales.
Name Origin:
Named for the country of origin, and the National Museum of Wales.
Physical Properties:
Cleavage:
[0001] Perfect
Color:
light green or pale sea green.
Density:
2.77
Habits:
Encrustations - Forms crust-like aggregates on matrix., Hexagonal - Six-sided crystal shape in cross-section or habit., Platy - Sheet forms (e.g. micas).
Hardness:
2 - Gypsum
Luster:
Pearly
Streak:
pale green
More details...