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A point group symbol with inversion added.
Also known as: Diffraction symmetry class, Eleven Laue classes
The symbol naming one of eleven Laue classes, the point groups obtained by adding a centre of inversion to every crystal class.
Names one of the eleven Laue classes, the point groups that result from adding a centre of inversion to each crystal class.
Contexts: Laboratory
Matters because a diffraction pattern is centrosymmetric whether or not the crystal is, so an experiment can determine the Laue class directly and the crystal class only by inference.
Contexts: Laboratory
A point group symbol written with a bar or an m indicating the added inversion, one of only eleven such strings.