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, …

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 …

Definition of 'trigonal' trigonal in British English (ˈtrɪɡənəl ) adjective 1. another word for triangular (sense 1)

Apr 18, 2024 · Trigonal crystal systems have a threefold symmetry axis, typical in minerals like quartz; hexagonal systems feature a sixfold axis, seen in beryl.

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.

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 …