The borotellurates are heteropoly anion compounds which have tellurate groups attached to boron atoms. The ratio of tellurate to borate reflects the degree of condensation. In the anions are linked into a chain. In the structure is zero dimensional with isolated anions. These arrangements of oxygen around boron and tellurium can have forms resembling silicates. The first borotellurates to be discovered were the mixed sodium rare earth compounds in 2015.
The tellurate is of the form TeO6 in an octahedral arrangement. The borate is in the form BO3, with two oxygen atoms shared with two tellurate TeO6 groups.
Related compounds include boroantimonates, galloborates, borogermanates, borophosphates, boroselenates, boroselenites, and borosulfates.
Formation
Borotellurates are formed by heating boric acid, and tellurium dioxide, with metal carbonates or oxides at over 800 °C. Lower temperatures can be used with a flux like potassium carbonate.
Reactions
When heated to around 800 °C the borotellurates decompose by emitting TeO3 vapour and form a metal borate or metal tellurite.
List
| chem | mw | crystal system | space group | unit cell Å | volume | density | comment | references | |
|---|---|---|---|---|---|---|---|---|---|
| Rb3BaTeB7O15 | 837.02 | monoclinic | P21/n | a=9.102 b=6.409 c=25.794 β=97.278 Z=4 | 1492.6 | 3.725 | actually this is a tellurite | ||
| Sr5TeO2(BO3)4 | 832.94 | tetragonal | P4/mnc | a= 7.6005 c=10.401 Z=2 | 600.82 | 4.604 | colourless; birefringence is 0.048 at 1064 nm | ||
| Na2Y2TeO4(BO3)2 | 533.02 | monoclinic | P21/c | a=6.3073, b=9.9279, c=6.7219; β=104.26°; Z=2 | 407.94 | 4.339 | |||
| barium tellurium borate | Ba4B8TeO19 | 1067.44 | monoclinic | Cc | a=11.512 b=6.667 c=19.700 β=105.734 Z=4 | 1455.3 | 4.872 | double layers; SHG 1×KH2PO4 | |
| Ba2Mg2TeB2O10 | 632.52 | orthorhombic | Cmca | a=6.177 b=10.383 c=12.956 Z=4 | 830.9 | 5 | |||
| Na2Dy2TeO4(BO3)2 | 680.20 | monoclinic | P21/c | a=6.3089, b=9.9808, c=6.7489; β=104.394°; Z=2 | 411.62 | 5.488 | decompose 842.1 | ||
| Na2Ho2TeO4(BO3)2 | 685.06 | monoclinic | P21/c | a=6.3060, b=9.9360, c=6.7339; β=104.230°; Z=2 | 408.98 | 5.563 | decompose 844.2 | ||
| Na2Er2TeO4(BO3)2 | 689.72 | monoclinic | P21/c | a=6.2964, b=9.9056, c=6.7089; β=104.110°; Z=2 | 405.81 | 5.645 | decompose 850.5 | ||
| Na2Tm2TeO4(BO3)2 | 693.06 | monoclinic | P21/c | a=6.2801, b=9.8594, c=6.6918; β=104.010°; Z=2 | 401.89 | 5.727 | decompose 852.0 | ||
| Na2Yb2TeO4(BO3)2 | 701.28 | monoclinic | P21/c | a=6.2631, b=9.8269, c=6.6741; β=103.972°; Z=2 | 398.62 | 5.843 | decompose 871.0 | ||
| Na2Lu2TeO4(BO3)2 | 705.14 | monoclinic | P21/c | a=6.2588, b=9.7998, c=6.6539; β=103.714°; Z=2 | 396.48 | 5.907 | decompose 878.5 | ||
| Pb2Mg2TeB2O10 | 772.22 | orthorhombic | Cmca | a=6.055 b=10.300 c=12.521 Z=4 | 780.9 | 7 |
References
- ^ Feng, Jiang-He; Hu, Chun-Li; Xu, Xiang; Kong, Fang; Mao, Jiang-Gao (2 March 2015). "Na 2 RE 2 TeO 4 (BO 3 ) 2 (RE = Y, Dy–Lu): Luminescent and Structural Studies on a Series of Mixed Metal Borotellurates". Inorganic Chemistry. 54 (5): 2447–2454. doi:10.1021/ic503068s. PMID 25692324.
- Kong, Fang; Ma, Yunxiang; Mao, Jianggao (January 2018). "Lanthanide Inorganic Solids Based on Main Group Borates and Oxyanions of Lone Pair Cations: Lanthanide Inorganic Solids Based on Main Group Borates and Oxyanions of Lone Pair Cations". Chinese Journal of Chemistry. 36 (1): 63–72. doi:10.1002/cjoc.201700597.
- ^ Liu, Lili; Young, Joshua; Smeu, Manuel; Halasyamani, P. Shiv (2018-04-16). "Ba 4 B 8 TeO 19 : A UV Nonlinear Optical Material". Inorganic Chemistry. 57 (8): 4771–4776. doi:10.1021/acs.inorgchem.8b00510. ISSN 0020-1669. PMID 29613780.
- Daub, Michael; Krummer, Michael; Hoffmann, Anke; Bayarjargal, Lkhamsuren; Hillebrecht, Harald (2017-01-26). "Synthesis, Crystal Structure, and Properties of Bi 3 TeBO 9 or Bi 3 (TeO 6 )(BO 3 ): A Non-Centrosymmetric Borate-Tellurate(VI) of Bismuth". Chemistry - A European Journal. 23 (6): 1331–1337. doi:10.1002/chem.201602480. PMID 27981647.
- Sun, Jun; Mutailipu, Miriding; Cheng, Shichao; Yang, Zhihua; Pan, Shilie (2020). "Rb 3 BaTeB 7 O 15 : a novel [B 7 O 16 ] fundamental building block in a new telluroborate with [TeO 3 ] polyhedra". Dalton Transactions. 49 (26): 8911–8917. doi:10.1039/D0DT01102A. ISSN 1477-9226. PMID 32555807. S2CID 219910405.
- Tang, Ruling; Hu, Chunli; Feng, Jianghe; Fang, Zhi; Chen, Yan; Kong, Fang; Mao, Jianggao (2020). "Sr 5 TeO 2 (BO 3 ) 4 and NaSr 5 (BO 3 )(SiO 4 ) 2 : two inorganic metal borate derivatives with diverse zero dimensional anions". Dalton Transactions. 49 (12): 3743–3749. doi:10.1039/C9DT03839F. ISSN 1477-9226. PMID 31729509. S2CID 208037429.
- ^ Wen, Ming; Wu, Hongping; Hu, Cong; Yang, Zhihua; Pan, Shilie (2019-08-19). "Experiment and First-Principles Calculations of A 2 Mg 2 TeB 2 O 10 (A = Pb, Ba): Influences of the Cosubstitution on the Structure Transformation and Optical Properties". Inorganic Chemistry. 58 (16): 11127–11132. doi:10.1021/acs.inorgchem.9b01693. ISSN 0020-1669. PMID 31355637. S2CID 198965987.
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