octohedron


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octohedron

(ˌɒktəˈhiːdrən)
n
another name for octahedron
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References in periodicals archive ?
'When diamond crystals develop they grow into an octohedron shape - like one pyramid resting on top of another.
The Cu-O distances within the perovskite-like planes are short (about 1.89 [Angstrom]) while those in the perpendicular direction are long (about 2.41 [Angstrom]), and consequently the coordination polyhedron around copper is a bi-pyramid, rather than an octohedron. The shape of the bi-pyramid changes in a subtle way when the symmetry is lowered from tetragonal to orthorhombic.
Crystals are generally modified octohedrons on platy magnesite or calcite crystals.