The Barium Oxotellurate(IV) Bromides Ba₆Te₁₀O₂₅Br₂ and Ba₃Te₃O₈Br₂ with Channel Structures

Abstract

Two new barium oxotellurate(IV) bromides with sum formula Ba 6 Te 10 O 25 Br 2 and Ba 3 Te 3 O 8 Br 2 were obtained under hydrothermal conditions and were characterized by single-crystal X-ray diffraction. In the crystal structures of both compounds a three-dimensional Ba/Te/O network is perforated by channels, into which the lone pairs E of the Te IV atoms protrude and in which the Branions are located. Ba 6 Te 10 O 25 Br 2 {Aea2, Z = 8, a = 11.4707(9) Å, b = 31.140(2) Å, c = 18.3216(14) Å, 9331 F 2 data, 392 variable parameters, R[F 2 Ͼ 2σ(F 2 )] = 0.0376} can be described as a fourfold super structure derived from an idealized basic structure in space group Pmmn. The main building blocks of the super structure are nine crystallographically independent [TeO 3+1 ] units and one trigonal-pyramidal [TeO 3 ] unit, which share

From AgTeO2F and Ag2(TeO2F2) to Ag3F3(TeF6)(TeO2)12: the first silver tellurite oxyfluorides with linear and nonlinear optical properties

“…15 These polar tellurite groups can stimulate the formation of NCS structures, making metal tellurites good candidates for SHG materials. [16][17][18][19][20] Metal tellurites can also display plentiful structure types because the polar oxyanions can join together by condensation to generate 0D clusters, [21][22][23] 1D chains, [24][25][26][27] 2D layers 28,29 and even 3D frameworks. 30,31 Fluorine, as the most electronegative element, could replace oxygen ligands due to their similar ionic radii.…”

Synthesis and Crystal Structure of the Iron(III) Oxotellurate(IV) Phosphate Oxide Chloride Fe11(TeO3)2(TeO4)3(PO4)2O4Cl3

“…3.5 Å. Similar arrangements of halide ions located in small channels surrounded by lone‐pair elements have previously been described in the compounds M 3 Te 2 O 6 X 2 ( M = Sr, Ba; X = Cl, Br)16 and Ba 6 Te 10 O 25 Br 2 17. The long Te–Cl distances are just on the verge of the primary coordination sphere.…”