Positive uniaxial crystal with point group 6mm

For positive uniaxial crystals such as cadmium selenide (CdSe) belonging to the point group 6mm, Table 2.3 shows that the non-zero d coefficients are d15, d24, d31, d32 and d33, of which d24 = d15 and d32 = d31. Further, under Kleinman symmetry condition, d31 = d15.

 

SSf(ooe)

Sff(oee)

fSf(eoe)

d15d24d31d32d33

sinϕcosϕsin(θ1+θ2)sinϕcosϕsin(θ1+θ2)000

sin2ϕsinθ1cos2ϕsinθ1000

sin2ϕsinθ2cos2ϕsinθ2000

θ1θρ(ω1),θ2θρ(ω2), with ρ given in Table 1.6.

TABLE 3.16. Geometric factors contributing to deff(ω1) for each of the nonzero elements of the d matrix, for positive uniaxial crystals with point group 6mm, such as CdSe

The geometric factors ...

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