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KNa<sub>4</sub>B<sub>2</sub>P<sub>3</sub>O<sub>13</sub>: A Deep-Ultraviolet Transparent Borophosphate Exhibiting Second-Harmonic Generation Response
24
Citations
39
References
2019
Year
A new deep-ultraviolet transparent alkali metal borophosphate KNa<sub>4</sub>B<sub>2</sub>P<sub>3</sub>O<sub>13</sub> is synthesized by high-temperature flux method, and its properties were characterized by a combination of experimental and <i>ab initio</i> methods. This compound crystallizes in the noncentrosymmetric <i>Pna</i>2<sub>1</sub> space group and its framework is formed of one-dimensional infinite [B<sub>2</sub>P<sub>3</sub>O<sub>13</sub>]<sub>∞</sub> chains consisting of apex-sharing [BO<sub>4</sub>] and [PO<sub>4</sub>] tetrahedra. KNa<sub>4</sub>B<sub>2</sub>P<sub>3</sub>O<sub>13</sub> had a short ultraviolet edge (<190 nm) and exhibited a moderate powder second-harmonic generation signal (0.4 × KDP). The discovery of KNa<sub>4</sub>B<sub>2</sub>P<sub>3</sub>O<sub>13</sub> enriches the structural diversity of borophosphates and would bring a more comprehensive understanding of the structure-properties relationship in deep-ultraviolet nonlinear optical crystals.
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