Octahedron and trisoctahedron
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“A combination of a trisoctahedron and an octahedron. It will be noted that the faces of the trisoctahedron bevel the edges of the ocrahedron.” — Ford, 1912
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Combination FormsSource
William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 22
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