Symmetry groups {triclinic symmetry group} can have rotation by 120 degrees. Crystals {triclinic crystal}| can have three axes, all not perpendicular but all of same length, to make two crystal classes.
Physical Sciences>Chemistry>Inorganic>Phase>Phases>Solid>Crystal>Symmetry
5-Chemistry-Inorganic-Phase-Phases-Solid-Crystal-Symmetry
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224