Abstract
New Ca8−xPbxCdBi(VO4)7with the whitlockite-type structure were prepared by a standard solid-state method in air. Le Bail decomposition was used to determine unit-cell parameters. Structural refining was carried out by Rietveld's method. It is found that Bi3+cations located partially inM1 andM2 sites along with calcium, whileM3 site is settled in half by Pb2+-ions. Second-harmonic generation demonstrate highest non-linear optical activity and along with dielectric investigations indicate polar space groupR3c.
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