hermann-mauguin symbols
1Kubisches Kristallsystem — Würfelförmiger Pyrit, Navajún, La Rioja, Spanien …
2Tetragonales Kristallsystem — Roter Zirkon (Größe: 1,0 cm) aus Gilgit, Pakistan …
3Space group — In mathematics and geometry, a space group is a symmetry group, usually for three dimensions, that divides space into discrete repeatable domains. In three dimensions, there are 219 unique types, or counted as 230 if chiral copies are considered… …
4Wallpaper group — A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and… …
5Crystallographic point group — In crystallography, a crystallographic point group is a set of symmetry operations, like rotations or reflections, that leave a central point fixed while moving other directions and faces of the crystal to the positions of features of the same… …
6Orbifold notation — In geometry, orbifold notation (or orbifold signature) is a system, invented by William Thurston and popularized by the mathematician John Conway, for representing types of symmetry groups in two dimensional spaces of constant curvature. The… …
7Symbol — Zeichen; Vorzeichen; Signal; Piktogramm; Ikon; Bildzeichen; Token; Markierung; Merkmal; Emblem; Wahrzeichen; Hoheitszeichen; …
