Selenate selenite

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A selenate selenite is a chemical compound or salt that contains selenite and selenate anions (SeO32- and SeO42-). These are mixed anion compounds. Some have third anions.

Naming

A selenate selenite compound may also be called a selenite selenate.

Production

One way to produce a selenate selenite compound is to evaporate a water solution of selenate and selenite compounds.[1]

Properties

On heating, selenate selenites lose SeO2 and O2 and yield selenites, and ultimately metal oxides.[2]

Related

Related to these are the sulfate sulfites and tellurate tellurites. They can be classed as mixed valent compounds.

List

name formula ratio

SeO4:SeO3

mw system space group unit cell Å volume density properties references
Boroseleniteselenate B2Se3O10 1:2 monoclinic P21/c a = 4.3466, b = 7.0237, c = 22.1460, β = 94.922°, Z = 4 colourless hygroscopic [3]
Na2(SeO4)(H2SeO3)· H2O 1:1 orthorhombic Cmc21 a=9.615, b=11.19, c=9.62 Z=4 [4]
Sc2(SeO3)2(SeO4) 1:2 monoclinic P21/c a = 6.5294, b = 10.8557, c = 12.6281, β = 103.543° Z = 4 870.21 [5]
Sc2(TeO3)(SeO3)(SeO4) 1:1 monoclinic P21/c a = 6.535, b = 10.970, c = 12.559, β = 102.70° Z = 4 878.3 [5]
Fe(SeO4)(HSeO3)· H2O 1:1 monoclinic P21/c a=8.355,b=8.696,c=9.255, β=93.72°,Z=4 670.95 [6]
Lithium sequicopper selenite selenate Li2Cu3(SeO3)2(SeO4)2 2:2 monoclinic I2/a a=16.293,b=5.007,c=14.448, β = 94.21°, Z=4 1175.5 [7]
RbFe(SeO3)(SeO4) 1:1 a=5.339, c=41.206, Z=6 1040.2 [8]
Y2(SeO3)2(SeO4)(H2O)2·(H2O)0.75 1:2 monoclinic C2/c a=11.9118 b=6.8886 c=12.9644 β=103.839° UV cut off 211 nm
Zr(SeO3)(SeO4) 1:1 orthorhombic Pbca a = 8.291, b = 9.458, c = 15.357, Z = 8 1204.2 [9]
Zr4(SeO3)(SeO4)7 7:1 monoclinic P21/n a = 5.313, b = 10.704, c = 10.484, β = 104.13°, Z = 1 578.2 [9]
Zr3(SeO3)(SeO4)5·2H2O 5:1 triclinic P1 a = 5.273, b = 8.079, c = 11.959, α = 82.60°, β = 88.27°, γ = 89.87°, Z = 1 505.1 [9]
Ag4(Mo2O5)(SeO4)2(SeO3) 2:1 orthorhombic Pbcm a=5.6557, b=15.8904, c=15.7938, Z=4 1419.4 [10]
tricadmium(II) bis-[selenite(IV)] selenate(VI) Cd3(SeO3)2(SeO4) 1:2 monoclinic P21 a=8.302 b=5.337 c=10.843 β =108.641 Z=2 876.32 4.539 SHG 0.6×KDP; stable to 482 °C [2]
(NH4)4Cd(HSeIVO3)2(SeVIO4)2 2:2 triclinic P1 a = 5.791 b = 7.411 c = 10.736 α = 90.05° β = 105.02° γ = 112.61° 408.2 [11]
La2(HSeO3)(SeO4)· 2H2O 1:1 monoclinic P21/n a=7.272 b=9.409 c=11.940 β =93.32° [1]
NaLa(SeO3)(SeO4) 1:1 monoclinic P21/c a=10.751 b=7.098 c=8.437 β =90.90° [1]
Pr4(SeO3)2(SeO4)F6 1:6 monoclinic C2/c a = 22.305, b = 7.1054, c = 8.356, β = 98.05°, Z = 4 light green [12]
dineodymium diseleite selenate Nd2(SeO3)2(SeO4) · 2H2O 1:2 721.39 monoclinic C2/c a = 12.276, b = 7.0783, c = 13.329, β = 104.276° 1122.4 4.27 pink [13]
NaSm(SeO3)(SeO4) 1:1 monoclinic P21/c a = 10.669, b = 6.9166, c = 8.2588, β = 91.00° Z = 4 light yellow [1]
Er2(SeO3)2(SeO4) · 2H2O 1:2 monoclinic C2 a=11.935 b=6.881 c=6.473 β =103.79° Z=4 [1][14]
Hf(SeO3)(SeO4)(H2O)4 1:1 [15]
Au2(SeO3)2(SeO4) 1:2 orthorhombic Cmc21 a = 16.891, b = 6.3013, c = 8.327, Z = 4 886.2 orange yellow [16]
Hg3(SeO3)2(SeO4) 1:2 monoclinic P21 a = 8.3979 b = 5.3327 c = 11.148 β = 108.422° Z = 2 473.67 colourless [17]
Hg3Se(SeO3)(SO4) monoclinic P21/n a=7.1188 b=9.9209 c=12.4565 β=95.398° Z=4 875.84 6.854 colourless; band gap 3.5 eV; birefringence 0.069@546 nm [18]
Hg5O(SeO3)(SeO4) 1:1 1288.87 C2/c a=17.563 b=6.188 c=18.912 β =90.379 Z=8 2055.2 8.331 yellow [19]
Hg3Hg2Hg(HgO2)(SeO3)2(SeO4)·H2O 1:2 R3 a=5.9239 c=37.096 Z=3 [20]
Hg3Hg2Hg2(HgO2)(SeO3)2(SeO4)2·H2O 2:1 P31c a=5.8908 c=31.048 Z=2 [20]
Ag4Hg(SeO3)2(SeO4) 1:2 1028.95 orthorhombic Cmc21 a=8.1690 b=11.9903 c=10.8870 Z=4 1066.4 6.409 398 nm cutoff NLO 0.35×KDP [21]
Pb2(SeO3) (SeO4) 1:1 684.30 orthorhombic Pnma a=13.5080 b=5.6238 c=9.2706 Z=4 704.25 6.454 stable to 232 °C [2]
schmiederite Pb2Cu2(OH)4(SeO3)(SeO4) 1:1 monoclinic P21/m a = 9.922, b = 5.712, c = 9.396, β = 101.96°, Z = 2 [22]
Bi2(SeO3)2(SeO4) 1:2 814.84 monoclinic I2/a a= 8.0440 b=7.4377 c=14.7456 β =97.274 Z=4 875.11 6.184 colourless [23]
Ag2Bi2(SeO3)3(SeO4) 1:3 1157.54 monoclinic P21/m a=9.5380 b=5.4965 c=11.8207 β =92.892 Z=2 618.92 6.211 339 nm cutoff [21]
Th(SeO3)(SeO4) 1:1 monoclinic P21/c a=7.0351 b=9.5259 c=9.02266 β =103.128, Z=4 [24]
(H3O)[(UO2)(SeO4)(SeO2OH)] 1:1 monoclinic P21/n a = 8.668, b = 10.655, c = 9.846, β = 97.88° 900.7 [25]
[C5H14N][(UO2)(SeO4)(SeO2OH)] 1:1 monoclinic P21/n a=11.553, b=10.645, c=12.138, β=108.05, Z=4 [26]
[C5H14N]4[(UO2)3(SeO4)4(HSeO3)(H2O)]·(H2SeO3)(HSeO4) 5:2 triclinic P1 a = 11.7068, b = 14.816, c = 16.977, α = 73.899°, β = 76.221°, γ = 89.361°, Z = 2 2743.0 [27]
catena-(bis(Dimethylammonium) oxonium tetrakis(μ3-selenato)-(μ2-selenito)-aqua-hexaoxo-tri-uranium selenous acid) [C2H8N]2[H3O][(UO2)3(SeO4)4(HSeO3)(H2O)](H2SeO3)0.2 4:1.2 monoclinic P21/m a 8.3116 b 18.6363 c 11.5623 β =97.582° [28]
catena-(tris(Dimethylammonium) tetrakis(μ3-selenato)-(μ2-hydrogen selenito)-aqua-hexaoxo-tri-uranium dimethylamine) [C2H8N]3(C2H7N)[(UO2)3(SeO4)4(HSeO3)(H2O)] 4:1 orthorhombic Pnma a =11.659 b =14.956 c =22.194 [28]
[NH3(CH2)9NH3][(UO2)(SeO4)(SeO2OH)](NO3) 1:1 triclinic P1 a = 10.7480, b = 13.8847, c = 14.636, α = 109.960°, β = 103.212°, γ = 90.409°, Z= 4 1990.0 [29]
Cs2(H2O)5[(UO2)7(SeO4)2(SeO3)2O4]. H2O 2:2 monoclinic P21/m a =.1381, b =15.0098, c =15.1732 β=91.17° [30]

References

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