Meanings of rhombohedral in английском

Shapes rhomboidal, perchance rhombohedral-whoknows?

There are recent reports of weak ferromagnetism in graphite and synthetic carbon materials such as rhombohedral C(60) (ref.

The inclusions in the igneous matrix are unusual in that all possible crystalline morphologies for corundum are present: bipyramidal, prismatic, tabular, and rhombohedral.

The crystals belonged to rhombohedral space group R3 with a = 291.4 A and alpha = 61.9 degrees.

A remarkable case of enclosed impurities is presented by the so-called Fontainbleau limestone, which consists of crystals of calcite of an acute rhombohedral form (fig.

PhMV crystals belong to the rhombohedral space group R 3, with one icosahedral particle in the unit cell leading to 20-fold non-crystallographic redundancy.