AskDefine | Define tetragonal

Dictionary Definition

tetragonal adj : of or relating to or shaped like a quadrilateral

User Contributed Dictionary

English

Adjective

tetragonal
  1. Having four sides (as a tetragon); quadrilateral.
  2. Having two equal axes and one unequal, and all angles 90°.

Extensive Definition

In crystallography, the tetragonal crystal system is one of the 7 lattice point groups. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a square base (a by a) and height (c, which is different from a).
There are two tetragonal Bravais lattices: the simple tetragonal (from stretching the simple-cubic lattice) and the centered tetragonal (from stretching either the face-centered or the body-centered cubic lattice).
image:Tetragonal.png|Simple tetragonal image:Tetragonal-body-centered.png|Body-centered tetragonal
The point groups that fall under this crystal system are listed below, followed by their representations in international notation and Schoenflies notation, and mineral examples.

References

  • Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., pp. 73 - 78, ISBN 0-471-80580-7
tetragonal in German: Tetragonales Kristallsystem
tetragonal in Estonian: Tetragonaalne süngoonia
tetragonal in Esperanto: Tetragona kristalsistemo
tetragonal in Basque: Kristal-sistema tetragonal
tetragonal in Korean: 정방정계
tetragonal in Latvian: Tetragonālā singonija
tetragonal in Polish: Układ tetragonalny
tetragonal in Russian: Тетрагональная сингония
tetragonal in Slovak: Tetragonálna sústava
tetragonal in Serbian: Тетрагонална кристална система
tetragonal in Serbo-Croatian: Tetragonalna kristalna sistema
tetragonal in Swedish: Tetragonala kristallsystemet
tetragonal in Ukrainian: Тетрагональна сингонія
tetragonal in Chinese: 四方晶系
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