“…[1][2][3][4] To meet the growing demand for high-performance materials in the laser industry, numerous NLO materials have been developed from various systems. [5][6][7][8][9][10][11][12] Among these, borates, a rapidly expanding class of compounds in solid-state chemistry, exhibit unique structures that give rise to diverse properties. [13][14][15][16][17][18][19][20] From a chemical viewpoint, boron can bond with two, three, or four oxygen atoms to form linear BO 2 , planar BO 3 , or tetrahedral BO 4 building blocks, respectively, via sp, sp 2 , and sp 3 hybridization.…”