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Pyrite ( FeS2 )
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Crystal symmetry
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Isometric diploidal Space group: Pa3
H-M symbol: 2/m3
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Unit cell
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a = 5.417 Å , Z = 4
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Identification
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Color
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Pale brass-yellow, tarnishes darker and iridescent
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Crystal system
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Isometric
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Cleavage
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Indistinct on {001};
partings on {011} and {111}
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Mohs scale hardness
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6 - 6.5
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Diaphaneity
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Opaque
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Specific gravity
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4.95 - 5.10
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Fusibility
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2.5 - 3 to a magnetic globule
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Other characteristics
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paramagnetic
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Pyrite is a semiconductor material with band gap of 0.95 eV.[15]
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