Fandom

Geology Wiki

Triclinic crystal system

519pages on
this wiki
Add New Page
Talk0 Share
File:Microcline.jpeg
File:Triclinic.svg

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, all three vectors are not mutually orthogonal.

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.

Triclinic crystal classesEdit

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) Template:Overline 1x [2+,2+] Wollastonite centrosymmetric PTemplate:Overline

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 (Template:Overline).

See alsoEdit

ReferencesEdit

Template:Reflist

  • Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., pp. 64 – 65, ISBN 0-471-80580-7

Template:Crystal systems


Cite error: <ref> tags exist, but no <references/> tag was found

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.