The hexagonal crystal system is one of the two crystal systems, with the trigonal system, that make up the hexagonal crystal family, which is one of the six crystal families in crystallography. The cited article, titled Hexagonal crystal family because the system has no separate article, explains that the family includes two crystal systems and two lattice systems, hexagonal and rhombohedral, and that it consists of the twelve point groups such that at least one of their space groups has the hexagonal lattice as underlying lattice. It is the union of the hexagonal crystal system and the trigonal crystal system and has fifty-two space groups associated with it. Materials whose crystals belong to this system are grouped under this concept.
Connections
Crystal System Of Material
Entity-backed identity for the crystal-system enum value this material already carries, resolved to an earth concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The crystal-system fact itself stays on the material unchanged.
Entity-backed identity for the crystal system this mineral already carries as an enum fact, phase 3 bucket conversion (docs\design_entity_backed_browse_buckets_20260928.md, w-bucketconv-divmore2-0929). The original fact stays on the entry unchanged.
In Discipline
Source Hexagonal Crystal System
Sources
Hexagonal Crystal System
Wikipedia, lead section
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 rhombohedral).
In Discipline: Geology, Lead section (in-discipline Geology)
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 rhombohedral).
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