World Library  
Flag as Inappropriate
Email this Article

Triclinic crystal system

Article Id: WHEBN0000666401
Reproduction Date:

Title: Triclinic crystal system  
Author: World Heritage Encyclopedia
Language: English
Subject: Infobox element/crystal structure/doc, Crystal system, Crystallographic point group, Crystallography, Hermann–Mauguin notation
Collection: Crystallography
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Triclinic crystal system

An example of the triclinic crystals, microcline
Triclinic (a ≠ b ≠ c and α ≠ β ≠ γ )

In crystallography, the triclinic crystal system is one of the 7 crystal systems. A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system. In addition, no vector is at right angles (90°) orthogonal to another.

The triclinic lattice is the least symmetric of the 14 three-dimensional Bravais lattices. It has (itself) the minimum symmetry all lattices have: points of inversion at each lattice point and at 7 more points for each lattice point: at the midpoints of the edges and the faces, and at the center points. It is the only lattice type that itself has no mirror planes.

Crystal classes

The triclinic crystal system class names, examples, Schönflies notation, Hermann-Mauguin notation, point groups, International Tables for Crystallography space group number,[1] orbifold, type, and space groups are listed in the table below. There are a total 2 space groups.

# Point group Example Type Space group
Class Schönflies Intl orbifold Coxeter
1 Pedial [2] C1 1 11 [ ]+ Tantite enantiomorphic polar P1
2 Pinacoidal [2] Ci (= S2) 1 [2+,2+] Wollastonite centrosymmetric P1

With each only one space group is associated. Pinacoidal is also known as triclinic normal. Pedial is also triclinic hemihedral

Mineral examples include plagioclase, microcline, rhodonite, turquoise, wollastonite and amblygonite, all in triclinic normal (1).

See also

References

  1. ^ Prince, E., ed. (2006). International Tables for Crystallography. International Union of Crystallography.  
  2. ^ a b "The 32 crystal classes". Retrieved 2009-07-08. 
  • Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., pp. 64 – 65, ISBN 0-471-80580-7
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.