Tetrahedron and cube
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“A combination of cube and tetrahedron. It will be noted that the tetrahedron faces truncate the alternate corners of the cube, or that the cube faces truncate the edges o a tetrahedron.” — Ford, 1912
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Combination FormsSource
William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 29
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