Entry from British & World English dictionary
Definition of crystal class in English:
Each of thirty-two categories of crystals classified according to the possible combinations of symmetry elements possessed by the crystal lattice.
- Many crystal classes are represented by a unique geometrical body.
- Each of the crystal classes is named according to the variant of a crystal form which it displays.
- Each crystal class will have crystal faces that uniquely define the symmetry of the class.
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