Calcium Phosphate, Apatite

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This crystal of Calcium Phosphate, Apatite, represents a complex combination of hexagonal hemihedral forms produced by the pyramidal selection. The nine forms comprise the basal pinacoid ,(P); the prism of the first order, (M); second order, (u); and third order, (h); three pyramids of the first order, (r), (x), and (y); one pyramid of the second order, (s); and one of the third order, (m).




George Huntington Williams, Ph.D. Elements of Crystallography for Students of Chemistry, Physics, and Mineralogy (New York, NY: Henry Holt and Company, 1892)


TIFF (full resolution)

4332×2581, 1.3 MiB

Large GIF

1024×610, 60.7 KiB

Medium GIF

640×381, 30.1 KiB

Small GIF

320×190, 12.1 KiB