General Information:
Chemical Formula:
Pb6As2O7Cl4
Composition:
(Molecular Weight = 1,646.85 gm)
Arsenic 9.10 % As
Lead 75.49 % Pb
Chlorine 8.61 % Cl
Oxygen 6.80 % O
Empirical Formula:
Pb6As2O7Cl4
Environment:
Secondary mineral.
Locality:
Langban, Harstig, and Jakobsverg mines, Varmland Sweden.
Name Origin:
Named from the Greek for "sun" and "leaf', in reference to its color and structure.
Physical Properties:
Cleavage:
[011] Good
Color:
greenish yellow or yellow.
Density:
6.89
Diaphaniety:
Translucent
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:
2 - Gypsum
Luster:
Vitreous - Greasy
Streak:
light yellow
More details...