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Iron Sulfide, Fe1-xS (Pyrrhotite)
Categories: Ceramic; Sulfide/Chalcogenide

Material Notes: Iron Sulfide with a variable iron content. Fe1-xS with x between 0 and 0.17. Example is Fe7S8.

Key Words: Fe0.98S or Fe7S8, Iron Sulfide
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Physical PropertiesOriginal ValueComments
Density 4.58 - 4.65 g/cc
 4.793 g/ccTheoretical (X-Ray) for Fe0.98S
a Lattice Constant 3.446 ÅFe0.98S
c Lattice Constant 5.848 ÅFe0.98S
Formula Units/Cell (Z) 2Fe0.98S
Molecular Weight 86.79 g/molFe0.98S
 647.409 g/molFe7S8
 
Mechanical PropertiesOriginal ValueComments
Hardness, Mohs 3.5 - 4.5
 
Descriptive Properties
Appearanceiridescent, but may tarnish
CAS Number1317-37-9
ColorYellow-bronze to brown
Crystal StructureHexagonalDefect Niccolite Fe7S8

References for this datasheet.

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EINOR0383 / 3512

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