Two new tellurite halides with cationic layers: syntheses, structures, and characterizations of CdPb₂Te₃O₈Cl₂ and Cd₁₃Pb₈Te₁₄O₄₂Cl₁₄

Abstract

Two new tellurite halides, CdPb2Te3O8Cl2 and Cd13Pb8Te14O42Cl14 with mixed cationic layered structures, have been synthesized by high-temperature solution method. CdPb2Te3O8Cl2 crystallizes in the noncentrosymmetric Aba2 space group, built by [CdPb2Te3O8]...

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.…”

Sb5O7I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

“…Recently, NLO materials containing mixed anions have been considered as promising candidates with optimized comprehensive properties. − Notably, metal oxyhalides, a branch of enormously relevant mixed-anion compounds that have diverse structural features and physical properties, have received rapidly increasing interest. − Metal oxyhalides Bi 7 F 11 O 5 , KWO 3 F, CdPb 2 Te 3 O 8 Cl 2 , Pb 17 O 8 Cl 18 , Pb 13 O 6 Cl 4 Br 10 , and CuSb 2 O 3 X (X = Cl, Br) are reported to exhibit second-harmonic-generation (SHG) responses. It can be noted that most of these oxyhalides are fluorides, chlorides, and bromides, while iodides are very rare because of their synthetic difficulties.…”

From CdPb8(SeO3)4Br10 to Pb3(TeO3)Br4: the first tellurite bromide exhibiting an SHG response and mid-IR transparency

“…The prominent absorption peaks at 605-775 cm −1 correspond to the bending and stretching vibrations of the Se-O and Te-O bonds, which are consistent with previous literature reports. 17,50 In summary, CdPb 8 (SeO 3 ) 4 Br 10 and Pb 3 (TeO 3 )Br 4 exhibit a wide transparency range of 0.33-12.96 μm and 0.33-12.95 μm, respectively. Considering the deviation of the IR cutoff edge for powder and crystal measurements due to multiphonon absorption, 50% eliminations were made.…”

“…Similarly, due to the neglect of longer secondary bonds involving Pb 2+ cations, the calculated oxidation states tend to be underestimated. 50 If longer Pb⋯Br and Pb⋯O distances were to be considered, the BVS of Pb(1)–Pb(3) can be raised to 1.943–1.967.…”