First order pyramid

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“The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which interesects all three crystallographic axes, the intercepts upon the two horizontal axes being equal.” — Ford, 1912

Keywords

geology, geometry, pyramid, first, order, isoceles

Galleries

Bipyramids

Source

William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 33

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