✍ Scribed by M. Touboul; E. Bétourné; G. Nowogrocki
No coin nor oath required. For personal study only.
Thallium triborate, TlB 3 O 5 (TBO), crystallizes in the orthorhombic system, space group P2 1 2 1 2 1 with unit cell dimensions a ؍ 5.2099(3) A s , b ؍ 8.248(1) A s , and c ؍ 10.206(2) A s ; Z ؍ 4. The structure was solved from 1340 independent reflections to R ؍ 0.038 and R w ؍ 0.041. The borate anion of the structure forms a three-dimensional framework built up from B 3 O 3 rings; its shorthand notation is 3 :R 3 (2 ؉T ), where is a BO 3 triangle and T is a BO 4 tetrahedron. This compound is isostructural with CsB 3 O 5 (CBO) but some differences exist in the oxygenated surroundings of cesium and thallium cations due to the larger size of Cs ؉ . Like CBO, TBO may be a good candidate for nonlinear optical applications as a second harmonic generator.
📜 SIMILAR VOLUMES
Raman spectra of cesium triborate were recorded at room temperature and liquid nitrogen temperature and the infrared reflectance spectra at room temperature. The assignments of characteristic vibrational modes are presented. A comparison of cesium borate and lithium borate was made. A correlation ex
**The first single crystals of As~2~O~5~** have now been obtained by annealing amorphous As~2~O~5~ under oxygen excess pressure and with careful exclusion of moisture. They were suitable for X‐ray structure analysis.