In crystallography, describing a crystal form with eight faces arranged in two tetrahedral groups.
From 'di-' (two) and 'tetrahedral' (from Greek 'tetra,' four, and 'hedron,' face), referring to a double tetrahedron or bipyramid crystal form.
Ditetrahedral crystals like the diamond occur naturally as two tetrahedra joined point-to-point—this geometric shape is one of nature's most stable and beautiful arrangements!
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