छह समान चेहरों (या तो rhombuses या समांतरोग्राम) द्वारा एक समानांतर

Adjective:

तिर्यगायत षडनीक, मुख्यत: रवा,

rhombohedra's Usage Examples:

Ferrous carbonate, FeCO3, or spathic iron ore, may be obtained as microscopic rhombohedra by adding sodium bicarbonate to ferrous sulphate and heating to 150° for 36 hours.

It forms a lustrous, nearly black crystalline mass, composed of minute rhombohedra.

The faces of these two rhombohedra exhibit differences in surface characters, those of r being usually brighter in lustre than those of z; further, the former often predominate in size (figs.

The apparent hexagonal bipyramid is really a combination of two rhombohedra, the direct rhombohedron r{ loo} and the inverse rhombohedron z{221{.

It crystallizes in microscopic rhombohedra insoluble in cold acids.

Wollaston in the angles of the rhombohedra of the carbonates isomorphous with calc-spar, he observed that the angle in the case of calc-spar varied with the temperature.

Aluminium fluoride, AlF 3, obtained by dissolving the metal in hydrofluoric acid, and subliming the residue in a current of hydrogen, forms transparent, very obtuse rhombohedra, which are insoluble in water.

It crystallizes in rhombohedra belonging to the hexagonal system, having interfacial angles of 87° 40'.

It forms colourless, transparent rhombohedra, like those of Iceland spar; the angles are nearly equal to right angles, being 73° 30', so that the crystals look like cubes: hence the name of "cubic saltpetre."

It crystallizes in glistening rhombohedra, melting at 70°-80° C., and boiling at Ioo° C. It is completely resolved into its components when warmed with dilute acids.

rhombohedra's Meaning':

a parallelepiped bounded by six similar faces (either rhombuses or parallelograms