crystal form

Identity, or approximate identity, of crystal form is not in itself sufficient to establish true isomorphism.

When both the crystal form and structure are retained, the substances are said to be isomorphous.

This can be purchased in crystal form, and one teaspoonful dissolved in two quarts of water is the proper strength.

A number of species closely related in composition, crystal form, and properties are here included.

These crystals are cubical in shape, but generally massed together so that no single crystal form may be observed as complete.