Crystallographic forms (48 crystal forms)

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A crystal form is a group of faces, all of which have the same relation to the functions of symmetry on the crystal — the symmetry on a crystal has a direct influence on which specific forms are present.

There are 48 possible crystal forms (47 forms as defined by crystallographers of the Fedorov Institute, see annotation #7) that can be developed as the result of the 32 combinations of symmetry. The forms present on crystals may be classified as (i) non-isometric and (ii) isometric — isometric crystals have essentially a different set of forms than the same in the other crystal systems.

The faces of a crystal form may intersect faces of another form on a crystal resulting in shapes being altered not resembling the perfect texbook full form shown above.

Website: http://geology.uaic.ro/muzee/mineralogie/

Concept & 3D-modelling by dr. Andrei Ionut APOPEI