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The hexagonal crystal family consists of two crystal systems: trigonal and hexagonal. A crystal system is a set of point groups in which the point groups themselves and their corresponding space groups are assigned to a lattice system (see table in Crystal system#Crystal classes). The trigonal crystal system consists of the 5 point groups that ...
Irregular snow crystal (I) – Subdivided into: Ice particle, rimed particle, broken piece from a crystal, miscellaneous; Germ of snow crystal (G) – Subdivided into: Minute column, germ of skeleton form, minute hexagonal plate, minute stellar crystal, minute assemblage of plates, irregular germ; They documented each with micrographs. [26]
Crystal systems that have space groups assigned to a common lattice system are combined into a crystal family. The seven crystal systems are triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic. Informally, two crystals are in the same crystal system if they have similar symmetries (though there are many exceptions).
This category is for crystals in the hexagonal system, not for those in the trigonal system which is also part of the hexagonal family. Subcategories This category has the following 9 subcategories, out of 9 total.
Pages in category "Hexagonal minerals" The following 105 pages are in this category, out of 105 total. This list may not reflect recent changes. A. Achávalite;
Slower crystal growth from colder and drier atmospheres produces more hexagonal symmetry. [2] Depending on environmental temperature and humidity, ice crystals can develop from the initial hexagonal prism into many symmetric shapes. [4] Possible shapes for ice crystals are columns, needles, plates and dendrites. Mixed patterns are also possible ...