“…Borates, [1][2][3] fluoroborates, [4][5][6] niobates, 7,8 phosphates, 9 sulfates, 10 selenates, 11 vanadates, and other crystals are currently popular for research, and among them vanadates are applied in catalysts, 12,13 dielectrics, 14,15 magnetism, 16,17 batteries, 18,19 optoelectronics, laser technology, 20,21 luminescent materials, and many other fields, such as fluorescent materials M 5 (VO 4 ) 3 Cl (M = Ca, Sr, Ba) 22 and Pb 5 (VO 4 ) 3 Cl, 23 birefringent materials YVO 4 24 and Rb 2 VO(O 2 ) 2 F, 25 and nonlinear optical (NLO) materials BiVO 4 26 and Ca 9 Bi(VO 4 ) 7 . 27 It follows that the development of new vanadate crystal structures is necessary for many frontier research areas.…”