dihexagonal


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dihexagonal

[dī·hek′sag·ən·əl]
(crystallography)
Of crystals, having a symmetrical form with 12 sides.
References in periodicals archive ?
This belly band constitutes a dihexagonal prism, {4150}, the angles of which are exactly those reported above.
The davyne in Figure 11 shows 12 prism faces (either the first and second-order prisms or a dihexagonal prism), plus a hexagonal pyramid and small c-face.
The specimens were subsequently studied by Zambonini (1910), who decided they were neither nepheline nor davyne but a new species he called "natrodavyne," a member of the "davyne-microsommite series." Utilizing etch figures he determined the crystal class to be dihexagonal dipyramidal (6/mmm), and the axial ratio (c/a) to be 1.6720.