Table 2 Anisotropic biaxial stress field, monodomain phases: Schematic representation, polarization’s components, notations, symmetry, space group, and basis vectors in the pseudo-cubic reference

P₁ = P₂ = P₃ = 0

Paraelectric

Orthorhombic

P2/mmm

[100], [010], [001]

P₁ = P₂ = 0, P₃ ≠ 0

c [131, 132, 133, 143] phase

Orthorhombic

P2mm

[100], [010], [001]

P₁ ≠ 0, P₂ = P₃ = 0

a′ [131, 133], a₁ [143, 132] phase

Orthorhombic

P2mm

[100], [010], [001]

P₁ = 0, P₂ ≠ 0, P₃ = 0

a″ [131, 133], a₂ [143, 132] phase

Orthorhombic

P2mm

[100], [010], [001]

P₁ ≠ 0, P₂ ≠ 0, P₃ = 0

aa* [131], a′a″ [133], O₁₂ [143], a₁a₂ [132] phase

Monoclinic

Pm

[100], [010], [001]

P₁ ≠ 0, P₂ = 0, P₃ ≠ 0

a′c [131, 133], O₁₃ [143], a₁c [132] phase

Monoclinic

Pm

[100], [010], [001]

P₁ = 0, P₂ ≠ 0, P₃ ≠ 0

a″c [131, 133], O₂₃ [143], a₂c [132] phase

Monoclinic

Pm

[100], [010], [001]

P₁ ≠ 0, P₂ ≠ 0, P₃ ≠ 0

r* [131], γ′ [133], r [143] phase

Triclinic

P1

[100], [010],[001]