Pyroelectricity

Pyroélectricité (Fr). Pyroelectrizität (Ge). Pyroelectricidad (Sp).

Definition

Pyroelectricity is the property presented by certain materials that exhibit an electric polarization P_i when a temperature variation δT is applied uniformly:

P_i = p_i δT

where p_i is the pyroelectric coefficient.

Conversely, .

Pyroelectric point groups

The geometric crystal classes for which the piezoelectric effect is possible are determined by symmetry considerations (see Curie laws). They are the classes, of which the symmetry is a subgroup of the symmetry associeted withat of the electric field

1, 2, 3, 4, 6, m, 2mm, 3m, 4mm, 6mm

See also

Section 10.2 of International Tables of Crystallography, Volume A
Section 1.1.4 of International Tables of Crystallography, Volume D

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