Pearson symbol

From Online Dictionary of Crystallography

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Symbole de Pearson (Fr); Pearson-Symbol (Ge); Símbolo de Pearson (Sp); Símbolo di Pearson (It); Символ Пирсона (Ru); ピアソン記号 (Ja).

The Pearson symbol describes simple crystal structures by a three-digit code, composed of:

  • an italicised lower-case letter indicating the crystal family
  • an italicised upper-case letter indicating the type of conventional unit cell
  • a number indicating the number of atoms in the unit cell.