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DITETRAGONAL PYRAMIDAL

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Originally appearing in Volume V07, Page 577 of the 1911 Encyclopedia Britannica.
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DITETRAGONAL PYRAMIDAL CLASS (See also:

Hemimorphic-hemihedral). Here there are two pairs of See also:vertical planes of symmetry intersecting in the tetrad See also:axis. The pyramids {hhll and lhol} and the bipyramid {hkl} are all hemimorphic. Examples are iodosuccimide (C 4H 402N I) , See also:silver fluoride (AgF .H20) , and penta-See also:erythrite (C&H12O4). No examples are known amongst minerals.

End of Article: DITETRAGONAL PYRAMIDAL

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