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.

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

A trigonal crystal, such as calcite, tourmaline or corundum, can be likened to a triangular prism. All edges are the same, with alpha, beta and gamma all the same, but the angles are not.

The trigonal crystal system, also known as the rhombohedral system, is one of the seven fundamental crystal systems used to classify crystalline solids. It is defined by the presence of …

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 …

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 …

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

Describes a crystallographic system, crystal form or structure with a unique triad of symmetry. ii. A symmetry operation requiring three repetitions to return to identity. iii. Characteristic of, …