“One of our recent projects was to make use of the rhombohedral crystals to construct the electron density profile of the transmembrane pores.”

“Translucent white to gray, tabular rhombohedral crystals with knifelike edges are common.”

“They usually involve three numbers or, in the case of hexagonal and rhombohedral symmetries, four numbers, one for each crystallographic axis.”

“The rhombic dodecahedron and the common trapezohedron are the most common forms.”

“Edges vanish, and it becomes a heptahedron, having three rhombic faces and four triangular faces.”

“A few sharp rhombic crystals of rhodochrosite without siderite coating were also found in the Eagle mine.”

“Massive compartments are delineated by fractures of the regional orthogonal system, though rhomboidal patterns are also common.”

“The supraoccipital is a weakly rhomboidal element, which meets the parietal in its deep posterior embayment as described above.”

“Among the common shapes are triangular, circular, rhomboidal, quadrate, trapezoidal, and elliptical.”