A new nonlinear optical material, the first fluoride selenite nitrate PbCdF(SeO 3 )(NO 3 ), was successfully synthesized by traditional solid state reactions. This compound crystallizes in the polar space group of Pca 2 1, and its structure features a novel 2D layered structure consisting of 1D lead nitrate chains and 2D cadmium selenite layers. PbCdF(SeO 3 )(NO 3 ) exhibits a phase-matchable SHG efficiency of about 2.6 times that of KDP and a wide band gap of 4.42 eV. Its laser damage threshold was measured to be 135.6 MW/cm 2, which is comparative to that of the reported Li 7 (TeO 3 ) 3 F with a short ultraviolet cutoff edge. Theoretical calculation confirmed that the synergistic effects of all the four functional units make PbCdF(SeO 3 )(NO 3 ) a remarkable SHG material.
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Ma et al. (2018) studied this question.
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