Point group symmetry of epsomite crystal

H. K. D. H. Bhadeshia

Epsomite is a hydrated magnesium sulphate, MgSO4.7H2O. The equilibrium shape of the crystal is illustrated and its point group symmetry is 222, with three mutually perpendicular diads, all of which pass through the orthogonal edges of the crystal.

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epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

The first sequence shows rotation about the vertical axis		 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

This sequence shows rotation about an axis normal to the plane of the diagram, passing through the centre of the diagram
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

 epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy
epsomite, point group symmetry, 222, crystallography, Bhadeshia, metallurgy

The 222 point group symmetry of epsomite


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