CsAB ₈ O ₁₂ F ₂ ·CsI (A = K ⁺ , NH ₄ ⁺ ): design of two fluorooxoborates with benign layered structures via a salt-inclusion strategy

A salt-inclusion strategy was adopted to construct two novel fluorooxoborates CsAB 8 O 12 F 2 ·CsI (A = K + , NH 4 + ). Therein, CsKB 8 O 12 F 2 ·CsI shows moderate SHG response (0.6 × KDP at 1064 nm) and short phase-matching (PM) SHG wavelength (270 nm).