General Information:
Chemical Formula:
Pb14(AsO4)2O9Cl4
Composition:
(Molecular Weight = 3,464.44 gm)
Arsenic 4.33 % As
Lead 83.73 % Pb
Chlorine 4.09 % Cl
Oxygen 7.85 % O
Empirical Formula:
Pb14(AsO4)2O9Cl4
Environment:
Found in dolomite rock with other Mn oxides.
Locality:
Langban, Filipstad, Varmland, Sweden.
Name Origin:
Named for Carl Andreas Sahlin (1861-1943), chemist and manager of the iron works at Laxa, Sweden.
Physical Properties:
Cleavage:
[010] Perfect
Color:
light yellow or pale sulfur yellow.
Density:
8
Diaphaniety:
Translucent
Habits:
Thin - Flat dimensioned crystals., Scaly - Morphology like fish scales., Aggregates - Made of numerous individual crystals or clusters.
Hardness:
2-3 - Gypsum-Calcite
Luster:
Adamantine
Streak:
light yellow
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