---
tag: 2B2NKG73FJ
kind: concept
name: Hall notation
sources:
  - wikipedia: en:463721@r1360908227
    locator: Space group, section Notation
    note: adopted
    mention: wikipedia://en/463721#UN49
    sections: [Summary]
inventory: [77MCBG5TFE]
---

## Summary

Space group notation with an explicit origin. Rotation, translation and axis-direction symbols are clearly separated and inversion centers are explicitly defined. The construction and format of the notation make it particularly suited to computer generation of symmetry information. For example, group number 3 has three Hall symbols: P 2y (P 1 2 1), P 2 (P 1 1 2), P 2x (P 2 1 1).