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An example of the tetragonal crystals, wulfenite Two different views (top down and from the side) of the unit cell of tP30-CrFe (σ-phase Frank–Kasper structure) that show its different side lengths, making this structure a member of the tetragonal crystal system. In crystallography, the tetragonal crystal system is one of the 7 crystal systems.
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).
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. Of the 32 point groups that exist in three dimensions, most are assigned to only one lattice system, in which case the crystal system and lattice system both have the same name.
In Hermann–Mauguin notation, space groups are named by a symbol combining the point group identifier with the uppercase letters describing the lattice type.Translations within the lattice in the form of screw axes and glide planes are also noted, giving a complete crystallographic space group.
Media in category "Tetragonal minerals" This category contains only the following file. Cassiterite.jpg 5,616 × 3,744; 4.17 MB
Tetragonal crystal system This page was last edited on 31 December 2022, at 16:52 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
Tetragonal crystal system (3 C, 1 P) Pages in category "Tetragonal crystals" The following 2 pages are in this category, out of 2 total.
Chalcopyrite is a member of the tetragonal crystal system. Crystallographically the structure of chalcopyrite is closely related to that of zinc blende ZnS . [18] The unit cell is twice as large, reflecting an alternation of Cu + and Fe 3+ ions replacing Zn 2+ ions in adjacent cells.