General Information:
Chemical Formula:
(Fe,Pb)4S8O
Composition:
(Molecular Weight = 526.19 gm)
Iron 40.33 % Fe
Lead 7.88 % Pb
Sulfur 48.75 % S
Oxygen 3.04 % O
Empirical Formula:
Fe2+3.8Pb0.2S8O
Environment:
In a carbonate-hosted deposit.
IMA Status:
Approved IMA (Dana # Added)
Locality:
La Mallieue lead-zinc deposit, Engis, about 40 km southwest of Liege, Belgium.
Name Origin:
For Prof. Willy Viaene (1943-), Katholieke Universiteit Leuven, Belgium.
Physical Properties:
Cleavage:
[110] Good
Color:
yellow.
Density:
3.7 - 3.9, Average = 3.8
Diaphaniety:
Opaque
Habits:
Aggregates - Made of numerous individual crystals or clusters., Spherical - Spherical, rounded aggregates.,
Hardness:
3.5-4.5
Luster:
Metallic
Streak:
black
More details...