Boroselenite
From Wikipedia, the free encyclopedia
The boroselenites are heteropoly anion chemical compounds containing selenite and borate groups linked by common oxygen atoms. They are not to be confused with the boroselenates with have a higher oxidation state for selenium, and extra oxygen. If selenium is replaced by sulfur, it would be a borosulfite. Boroselenites are distinct from selenoborates in which selenium replaces oxygen in borate, or perselenoborates which contain Se-Se bonds as well as Se-B bonds. The metal boroselenites were only discovered in 2012.[1]
List
| name | chem | mw | crystal system | space group | unit cell Å | volume | density | comment | references |
|---|---|---|---|---|---|---|---|---|---|
| boroseleniteselenate | B2Se3O10 | monoclinic | P21/c | a = 4.3466, b = 7.0237, c = 22.1460, β = 94.922; Z = 4 | [2] | ||||
| Se2B2O7 | 291.54 | orthorhombic | P212121 | a=7.4815 b=7.8984 c=9.0478 Z=4 | 534.65 | 3.622 | NLO 2.2 x KDP; band gap 4.64 eV; colourless | [3] | |
| Li2SeB8O15 | 419.32 | monoclinic | P21/c | a=8.641 b=16.282 c=8.415 β=94.426 Z=4 | 1180.4 | 2.350 | 3D;stable to 280 °C; band gap 4.81 eV | [4] | |
| NaSeB3O7 | 246.38 | monoclinic | P21/c | a=4.470 b=15.810 c=8.645 β=98.75 Z=4 | 603.8 | 2.710 | layered;stable to 290 °C; band gap 4.36 | [4] | |
| KSeB3O7 | 262.49 | monoclinic | P21/c | a=4.5569 b=17.601 c=8.669 β=95.92 Z=4 | 691.6 | 2.521 | layered stable to 280 °C; band gap 4.30 | [4] | |
| K2Se3B2O10 | 496.70 | orthorhombic | Pnma | a=14.1842 b=15.7516 c=4.7103 Z=4 | 1052.39 | 3.135 | 1D; stable to 330 °C; band gap 4.75 eV | [4] | |
| RbSe3B2O9(OH) | orthorhombic | P212121 | a=4.6591 b=11.9288 c=16.332 Z=2 | 907.7 | 3.695 | band gap 3.79 eV | [5] | ||
| CsSe3B2O9(OH) | orthorhombic | P212121 | a=4.671 b=12.236 c=16.417 Z=2 | 1104.84 | 3.911 | band gap 4.17 eV; SHG 0.8 x KDP | [5] | ||
| Bi2[B2(SeO3)6] | 600.67 | monoclinic | P21/c | a=7.4594 b=7.5056 c=13.2486 β=90.04 Z=4 | 741.75 | 5.379 | birefringence at 1064 nm is 0.090; 0D | [6] | |