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Rhombohedron

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rhombohedron
a six-sided prism whose sides are parallelograms
rhombohedron [¦räm·bō¦hē·drən]
(crystallography)
A trigonal crystal form that is a parallelepiped, the six identical faces being rhombs. Also known as rhomb.
(mathematics)
A prism with six parallelogram faces.
Rhombohedron 

a parallelepiped (usually oblique) whose faces are equal rhombuses. For at least two vertices all the adjacent angles must be equal. A parallelepiped is a rhombohedron if and only if it has an axis of three-fold symmetry.
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X-ray crystallography showed, however, that the basic unit of solid cubane is again a rhombohedron.
Structure puts cubane in a slanted box by Wu, C. / Science News
For example, it's possible to build up a nonrepeating pattern in three dimensions simply by using two types of rhombohedrons, which resemble skewed cubes.
Shadows and symmetries by Peterson, Ivars / Science News
 
 
 
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