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Tellurite tellurate

Summary

A tellurite tellurate is chemical compound or salt that contains tellurite and tellurate anions [TeO3]2- [TeO4 ]2-. These are mixed anion compounds, meaning the compounds are cations that contain one or more anions. Some have third anions. Environmentally, tellurite [TeO3]2- is the more abundant anion due to tellurate's [TeO4 ]2- low solubility limiting its concentration in biospheric waters. Another way to refer to the anions is tellurium's oxyanions, which happen to be relatively stable.[1]

Naming edit

A tellurite tellurate compound may also be called a tellurate tellurite. Compounds that contain the anions follow basic nomenclature rules, the cation is named first, followed by the anion.[2] As individual ions current IUPAC naming conventions dictate that compounds containing what was conventionally known as the tellurite ion, [TeO3]2-, be named as tellurate (IV) compounds, while other tellurates are labeled tellurate (VI) compounds. Furthering confusion, a number of other tellurate oxyanions exist, including pentoxotellurate, [TeO5]4-, and ditellurate, [Te2O10]8-. Additionally, a number of compounds that do not even include tellurium oxyanions still have "tellurate" in their names, as in the case of octafluoridotellurate, [TeF8]2-.[3]

Production edit

One way to produce a tellurite tellurate compound is by heating oxides together.[4] Tellurite tellurate compounds can also occur naturally as minerals such as Carlfriesite Ca[Te4+2Te6+O8].[5]

Properties edit

Tellurite tellurate compounds can crystalize under certain conditions. Monoclinic and orthorhombic dominate crystal structures of the tellurite tellurates.[5] Most compounds are transparent from near ultraviolet to the near infrared. Te-O bonds cause absorption lines in infrared. Sodium tellurite exhibit

Related edit

Related to these are the selenate selenites and sulfate sulfites by varying the chalcogen.

List edit

name formula ratio

TeO3:TeO4

mw system space group unit cell Å volume density optical references
NH4Te2O5(OH) 1:1 370.24 orthorhombic Pnma a=7.340 b=5.546 c=13.164 Z=4 535.9 4.50 [6]
K2Te4O12 1:3 780.59 monoclinic C2/m a=12.360 b=7.248 c=11.967 β =105.68 Z=4 1032.2 5.03 [4][1]
K4[Te56+Te34+]O23 3:5 1545.18 orthorhombic Pna21 a = 19.793, b = 14.664, c = 7.292, Z = 4 [7]
Carlfriesite Ca[Te4+2Te6+O8] 2:1 550.87 monoclinic C2/c a=12.576 b=5.662 c=9.884 β=115.56 6.3 [5]
K4V6[Te24+Te6+]O24 2:1 1228.83 trigonal R3c a = 9.7075, c = 42.701, Z = 6 3484.9 [8]
Co2+6(Te6+O6)(Te4+O3)2Cl2 2:1 999.30 tetragonal P42/mbc a = 8.59 c = 5.91 [5]
Rb4[Te56+Te34+]O23 3:5 1730.66 orthorhombic Pna21 a = 19.573, b = 14.448, c = 7.273, Z = 4 [7]
Rb4V6[Te24+Te6+]O24 2:1 1414.31 trigonal R3c a = 9.8399, c = 43.012, Z = 6 3606.6 [8]
Sr[Te4+2Te6+O8] 2:1 598.42 tetragonal P42/m a=6.8321 c=6.7605 [5]
SrCuTe2O7 1:1 518.36 orthorhombic Pbcm a = 7.1464, b = 15.061, c = 5.4380, Z = 4 585.3 [9]
NaYTe2O7 1:1 479.10 monoclinic P21/n a=6.7527 b=7.5077 c=11.8867 β =99.935 Z=4 593.59 5.361 [10]
RbTe1·25Mo0·75O6 a=10.469 [11]
(Ag,Na)2Te4O15 x=0.4 2:2 monoclinic P21/c a = 6.333, b = 24.681, c = 7.308, β = 110.84° Z = 4 [4]
Ag2[Te4+Te6+O6] 1:1 566.93 monoclinic P21/m a=5.4562 b=7.4009 c=6.9122 β=101.237 [5]
Ag2[Te4+2Te6+2O11] 2:2 902.13 triclinic P1 a=7.287 b=7.388 c=9.686 α=95.67 β=94.10 γ=119.40 [5]
Cd2Te4+Te6+O7 1:1 592.02 monoclinic P21/c a=9.3039 b=7.3196 c=13.2479 β=122.914 [5]
Cs2Te4+Te36+O12 1:3 968.20 rhombohedral R3m a=7.2921 c=18.332 [12]
CsTe2O6–x 1:1 484.10 cubic [12]
CsTe2O6–x 1:1 484.10 orthorhombic [12]
BaTe2O6 1:1 488.52 orthorhombic Cmcm a=5.569 b=12,796 c=7.320 Z=4 6.19 [5][2]
BaMgTe2O7 1:1 528.83 orthorhombic Ama2 a = 5.558, b = 15.215, c = 7.307 Z = 4 617.9 SHG 5 × KDP [13]
CsTe1·13Mo0·864O6 a=10.643 [11]
BaCoTeO3TeO4 1:1 563.46 orthorhombic Ama2 [14]
BaCuTeO3TeO4 1:1 568.07 orthorhombic Ama2 a = 5.4869, b =15.412, c = 7.2066, Z = 4. 609.42 [3]
BaZnTe2O7 569.91 orthorhombic Ama2 a = 5.5498, b = 15.316, c = 7.3098, Z = 4 621.34 SHG 5 × KDP [13]
CeV3Te3O15(OH)3·2H2O 995.74 hexagonal P63/mmc a=12.166 c=12.537 Z=4 1606.9 4.116 dark red [15]
PrV3Te3O15(OH)3·2H2O 996.53 hexagonal P63/mmc a=12.1147 c=12.4949 Z=4 1588.1 4.168 dark red [15]
NdV3Te3O15(OH)3·H2O 983.86 hexagonal P63/mmc a=12.1075 c=12.4572 Z=4 1581.5 4.132 dark red [15]
SmV3Te3O15(OH)3·H2O 989.97 hexagonal P63/mmc a=12.1068 c=12.4509 Z=4 1580.5 4.160 dark red [15]
EuV3Te3O15(OH)3·H2O 991.58 hexagonal P63/mmc a=12.0731 c=12.3674 Z=4 1561.2 4.219 dark red [15]
GdV3Te3O15(OH)3·H2O 996.87 hexagonal P63/mmc a=12.0745 c=12.3701 Z=4 1561.9 4.239 dark red [15]
RbTe1·5W0·5O6 a=10.462 [11]
CsTe1·625W0·375O6 a=10.543 [11]
α-Hg2Te2O7 1:1 768.38 monoclinic C2/c a=12.910 b=7.407 c=13.256 β =112.044 Z=8 [16]
β-Hg2Te2O7 1:1 768.38 orthorhombic Aea2 a=7.441, b=23.713 ,c=13.522, Z=16 [16]
PbCuTe2O7 1:1 637.94 orthorhombic Pbcm a = 7.2033, b = 15.047, c = 5.4691, Z = 4 592.78 [9]
Bi[(Bi3+Te4+)Te6+O8] 801.16 [5]
(Ca,Pb)3CaCu6[Te4+3Te6+O12]2(Te4+O3)2(SO4)2 3111.30 trigonal P3 2 1 a=9.1219(17), c=11.9320(9) 4.65 Viridian green [17]

References edit

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