In geometry, a rhombohedron (also called a rhombic hexahedron or, inaccurately, a rhomboid) is a special case of a parallelepiped in which all six faces...

scalene or rhomboid. The variety with rhombus-shaped faces faces is a rhombohedron. An alternative name for the same shape is the trigonal deltohedron....

zonohedrons, which can be seen as projective envelopes of hypercubes. A rhombohedron (also called a rhombic hexahedron) is a three-dimensional figure like...

In geometry, the elongated gyrobifastigium or gabled rhombohedron is a space-filling octahedron with 4 rectangles and 4 right-angled pentagonal faces....

rectangular cuboid (six rectangular faces), cube (six square faces), and the rhombohedron (six rhombus faces) are all specific cases of parallelepiped. "Parallelepiped"...

as lublinite. Cleavage is usually in three directions parallel to the rhombohedron form. Its fracture is conchoidal, but difficult to obtain. Scalenohedral...

isosceles trapezoids; 1, 2 or 3 (congruent) square(s) ?, ?, ? order 4 Rhombohedron 3 pairs of rhombi Ci, [2+,2+], (×) order 2 Parallelepiped 3 pairs of...

shape is a six-sided prism terminating with six-sided pyramid-like rhombohedrons at each end. In nature, quartz crystals are often twinned (with twin...

twins (in various orientations) and polysynthetic glide twinning on the rhombohedron [1011 Cleavage Poor Fracture Conchoidal, splintery Mohs scale hardness...

allegorical symbols, the picture includes a magic square and a truncated rhombohedron. The image in turn inspired a passage in The City of Dreadful Night by...

family can also be described by rhombohedral axes. The unit cell is a rhombohedron (which gives the name for the rhombohedral lattice). This is a unit cell...

combines the two words octahedron and tetrahedron into octet truss, a rhombohedron consisting of one octahedron (or two square pyramids) and two opposite...

(apex-truncated square pyramid) Parallelepiped (three pairs of parallelograms) Rhombohedron (three pairs of rhombi) Oh, [4,3], (*432) order 48 D2h, [2,2], (*222)...

Inactive chapters are in italics. Chapter was formed by absorbing the Rhombohedron Club, established in 1903. Chapter formed by absorbing the local Square...

the parallelepipeds with congruent rhombic faces. A special case of a rhombohedron is one in which the rhombi forming the faces have angles of 60° and 120°...

prismatic crystals are often terminated by the scalenohedron and the obtuse rhombohedron, thus resembling calcite (dog-tooth-spar) in habit. The color is scarlet-vermilion...

agree that it is the truncation of a rhombohedron. Despite this agreement, the exact geometry of this rhombohedron is the subject of several contradictory...

relaxed, it can be deformed into a non-right square prism or even into a rhombohedron with no right angle at all. There is no 18-faced strictly convex deltahedron...

pairs of parallel faces A prism of which the base is a parallelogram Rhombohedron A parallelepiped where all edges are the same length A cube, except that...

rhombicosidodecahedron Pyramid Bipyramid Disphenoid Parallelepiped Cuboid Rhombohedron Trapezohedron Frustum Trapezo-rhombic dodecahedron Rhombo-hexagonal dodecahedron...

unusual solid that dominates the left half of the image is a truncated rhombohedron with what may be a faint skull or face, possibly even of Dürer. This...

arecoline2•H2PtCl6, mp. 176 °C, crystallizes from water in orange-red rhombohedrons. The methiodide forms glancing prisms, mp. 173-174 °C. Arecoline is...

Dark teal, emerald green Crystal habit Six sided prisms terminated by rhombohedrons to massive Cleavage Perfect in three directions Fracture Conchoidal...

Rhombohedrons of calcite that appear almost as books of petals, piled up 3-dimensionally on the matrix, from Eastern Europe...

two regular tetrahedra can be combined with an octahedron, giving a rhombohedron that can tile space as the tetrahedral-octahedral honeycomb. On otherhand...

Square pyramid, Triangular prism Hexahedron Parallelepiped, Cuboid, Rhombohedron, Trigonal trapezohedron, Cube, Pentagonal pyramid, Triangular dipyramid...

Quadrilateral-faced hexahedral prismatoids: Parallelepipeds – six parallelogram faces Rhombohedrons – six rhombus faces Trigonal trapezohedra – six congruent rhombus faces...

parallel to the vertical axis beryl, tourmaline, vanadinite Rhombohedral Rhombohedron-shaped (six-faced rhombi) calcite, magnesite, rhodochrosite, siderite...

Mathematical references include a compass for geometry, a magic square and a truncated rhombohedron, while measurement is indicated by the scales and hourglass....

feature of the Blaw-Knox tower was its wide diamond (or rhomboidal, rhombohedron) shape, which served to make it rigid, to resist shear stresses. One...