CsAB₈O₁₂F₂·CsI (A = K⁺, NH₄⁺): design of two fluorooxoborates with benign layered structures via a salt-inclusion strategy

A salt-inclusion strategy was adopted to construct two novel fluorooxoborates CsAB8O12F2·CsI (A = K+, NH4+). Therein, CsKB8O12F2·CsI shows moderate SHG response (0.6 × KDP at 1064 nm) and short phase-matching (PM) SHG wavelength (270 nm).