Boroselenite
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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
[edit | edit source]| 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] |
References
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