β‐CsB₉O₁₄: A Triple‐Layered Borate with Edge‐Sharing BO₄ Tetrahedra Exhibiting a Short Cutoff Edge and a Large Birefringence

Abstract

The first triple-layered borate with edge-sharing BO 4 tetrahedra, b-CsB 9 O 14 was obtainedu nder vacuumsealed condition. It represents an ew structure type and enriches the structurald iversity of borates.M oreover, b-CsB 9 O 14 exhibits as hort UV cutoffe dge and al arge birefringence, indicating that it could be regardeda saDUV birefringentc rystal.Exploring new compounds with uniques tructures has attracted much interest of researchers, since these compounds not only enrich structural chemistry,but also may possess potential application in some areas. [1][2][3][4][5][6][7][8][9] Borates, especially,can be regarded as an excellent candidate to explore structure unique compounds due to various coordination pattern of B( BO 3 or BO 4 ) which may be polymerizedt of orm different fundamental buildingb locks (FBBs). Then the FBBs will furtherc onstruct isolated clusters, one-dimensional (1D) chains, 2D layers, or 3D networks. [10][11][12][13][14][15][16][17][18] The abundant structures of borates are deemed to be the major factor in their optical properties.F or example, borates with 2D layered structures generally feature excellent opticalp roperties, [3b, 19-23] since the 2D layered structures are conducive to the generation of optical anisotropies. The famousc rystal KBe 2 BO 3 F 2 (KBBF) exhibits the brilliant nonlinear opticalp roperties due to its infinite planar [Be 2 BO 3 F 2 ] 1 monolayer structure.B ased on the layereds tructure of KBBF,s everal new boratesi ncluding KZn 2 BO 3 Cl 2 ,B aBe 2 BO 3 F 3 ,e tc. [22a, 24, 25] were obtained through element substitution. In order to reinforce interlayer bonding, some borates with double-layered structures, which can be regarded as the polymerization of [a] Dr.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Ba3(BO3)(CO3)F: The First Borate Carbonate Fluoride Synthesized by the High‐Temperature Solution Method

“…[32,33,41,42] Besides, the peak at 1197 cm À1 assigns to the symmetric stretching vibration of [BO 3 ] 3À units,a nd the peaks at 765 and 582 cm À1 can be attributed to the bending vibration of [BO 3 ] 3À units. [43][44][45][46][47] In addition, no vibrational band caused by [OH] À or H 2 Ow as detected, which is in accordw ith the consequence from the single-crystal data.…”

Synthesis, crystal structure and luminescence properties of a new samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2

“…As for the coordination environment of the Cs + cation, it connects to ten O atoms, with Cs-O bond lengths in the range 3.316 (3)-3.7393 (14) Å ( Fig. 2d), which is common for Cs + oxometalates (Zhao et al, 2018a;Han et al, 2019). If we consider the smaller Na + and Sm 3+ ions as network units to connect isolated BO 3 and PO 4 groups, and the largest Cs + ion as a stand-alone cation, a three-dimensional (3D) [Na 2 Sm 2 -(BO 3 )(PO 4 ) 2 ] 1 network is constructed by BO 3 , PO 4 , NaO 7 and SmO 7 polyhedra.…”

La3B6O13(OH): The First Acentric High‐Pressure Borate Displaying Edge‐Sharing BO4 Tetrahedra

“…Since then, several other borates containing edge‐sharing BO 4 tetrahedra have been discovered under high‐pressure, like α‐ RE 2 B 4 O 9 ( RE =Y, Sm‐Ho), HP‐ M B 2 O 4 ( M =Fe, Co, Ni), HP‐KB 3 O 5 , and HP‐CsB 5 O 8 , and also under ambient and hydrothermal conditions, like in KZnB 3 O 6 , Li 4 Na 2 CsB 7 O 14 , β‐CsB 9 O 14 , and α‐Ba 3 [B 10 O 17 (OH) 2 ] …”