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Figure 1
Dipole moment P is a vector. In a crystallographic coordinate system, it can be expressed as P = pxi + pyj + pzk. Where i, j, k are the unit vectors, px, py and pz represent the dipole moment components along crystallographic a, b and c axes, respectively.

IUCrJ
Volume 9| Part 4| July 2022| Pages 516-522
ISSN: 2052-2525
https://doi.org/10.1107/S2052252522006017