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“The trisoctahedron is a form composed of twenty-four isosceles triangular faces, each of which intersects two of the crystallographic axes at unity and the third axis at some multiple. There are various trisoctahedrons the faces of which have different inclinations.” — Ford, 1912


William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 22


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