text: Example phases are:
  *β-MgAl: 1168 atoms per unit cell, face-centred cubic, atoms arranged in Friauf polyhedra.
  *ξ'–AlPdMn: 318 atoms per unit cell, face-centred orthorhombic, atoms arranged in Mackay-type clusters.
  *  (Bergman phase): 163 atoms per unit cell, body centred cubic, atoms arranged in Bergman clusters.
  *  (Taylor phase): 204 atoms per unit cell, face-centred orthorhombic, atoms arranged in Mackay-type clusters.