Viaeneite

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
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