trigonal system, one of the structural categories to which crystalline solids can be assigned. The trigonal system is sometimes considered to be a subdivision of the hexagonal system.

In crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and …

The meaning of TRIGONAL is of, relating to, or being the division of the hexagonal crystal system or the forms belonging to it characterized by a vertical axis of threefold symmetry.

Nov 24, 2022 · There are 7 crystal systems in 3D, which directly connect to 32 point groups when adding mirror planes and inversion. The 7 crystal systems are: Cubic, Hexagonal, Tetragonal, …

Jun 16, 2025 · The rhombohedral lattice is also known as trigonal, and has no angles equal to 90°, but all sides are of equal length (a = b = c), thus requiring only by one lattice parameter, …

Trigonal definition: of, relating to, or shaped like a triangle; having three angles; triangular.. See examples of TRIGONAL used in a sentence.

Aug 19, 2025 · trigonal (comparative more trigonal, superlative most trigonal) Having three angles and three sides, triangular. (crystallography) Of or pertaining to a crystal system with three …

For instance, in chemistry, a trigonal molecular geometry refers to molecules with three atoms around one central atom, forming a plane with a 120° bond angle.

It only has one minor difference from the hexagonal system, in that trigonal minerals have threefold symmetry, whereas true hexagonal minerals have sixfold symmetry. The trigonal …

Three groups of electrons around an atom X, always give a trigonal planar arrangement around the central atom X-. X-ray diffraction studies show it has the expected trigonal bipyramidal …