Symmetry of tetrahedral class

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“The symmetry of this class is as follows: The three crystallographic axes are axes of binary symmetry; the four diagonal axes are axes of trigonal symmetry; there are six diagonal planes of symmetry.” — Ford, 1912

Galleries

Crystals

Source

William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 27

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