RbMo₂P₃O₁₄ with large birefringence mainly induced by highly distorted [MoO₆] in uncommon [Mo₂P₃O₁₄]_∞ layers

Abstract

The introduction of the d0 transition metal Mo6+ cation into the phosphate generates a new acentric molybdophosphate, RbMo2P3O14.

Ba2Zn2B6O13: coplanar [B2O5] in unnoted U-shaped [B6O13] groups achieving large birefringence

“…Pb 2+ , Sn 2+ , Bi 3+ , Sb 3+ , Te 4+ ) with a stereochemically active lone pair (SCALP) are also regarded as birefringent functional genes, since they have a more significant effect on enhancing the optical anisotropy of the crystal; 28,29 for example, Sn 2 B 5 O 9 Cl, 30 SbB 5 O 9 , 31 α-BiB 3 O 6 32 and so on. 33–35 Unfortunately, the above metal cations have a negative influence on the bandgap, making the crystals inapplicable in the DUV region. Therefore, we chose alkaline earth metals with the capacity to blue-shift the cutoff edge as the A-site cation, while Zn, a transition metal with a strong coordination ability to oxygen is used as the B-site cation, expecting to use [ZnO 4 ] rigid polyhedra as a bond terminator to construct new 0D-configuration borates.…”