Selenite sulfate

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Selenite sulfates are

mixed anion compounds containing both selenite (SeO32−) and sulfate
(SO42−) anions.

They have transparent crystals that may be coloured by cations. Selenite sulfate minerals are known including pauladamsite and munakataite.

List

Name Formula Ratio
SeO3:SO4
MW
 System Space
group 		Unit cell dimensions (Å)
and internal angles 		Unit cell
volume Å3 		Density Comments Refs
Na8(SeO3)(SO4)3 1:3
orthorhombic
 Pna21 a=9.275 b=21.628 c=6.905 SHG 1.2 × KDP; birefringence 0.041 at 532 nm [1]
Na2(H2SeO3)(SO4) 1:1
monoclinic
 P21/c a=8.461 b=6.7563 c=10.880 β =90.13° [1]
K4(H2SeO3)(HSO4)2(SO4) 1:3
triclinic
 P1 a=7.4183 b=7.4833 c=14.413 α=89.915° β=86.814° γ=71.659° [1]
Co3(SeO3)(SO4)(OH)2 1:1 orthorhombic Pnma a=10.8757 b=6.4782 c=11.1579 [2]
Pauladamsite Cu4(SeO3)(SO4)(OH)4·2H2O 1:1 triclinic P1 a = 6.0742 b = 8.415 c = 10.780 α = 103.665 β = 95.224 γ = 90.004° Z = 2 533.0 green [3]
Cd4(SeO3)2(SO4)2 orthorhombic P212121 a=5.3524 b=14.595 c=15.892 [4]
Ag2Cd(Se2O5)(Se0.3S0.7O4) triclinic P1 a 6.7485 b 6.8504 c 9.769, α 101.36° β 105.95° γ 91.16° [5]
Pr2(SeO3)2(SO4)(H2O)2 2:1 monoclinic C2 a=11.719 b=6.8495 c=6.5043 β=103.265 Z=2 508.18 4.364 light green [6]
Sm2(SeO3)2(SO4)(H2O)2 2:1 monoclinic C2 [7]
Dy2(SeO3)2(SO4)(H2O)2 2:1 monoclinic C2 [7]
Yb2(SeO3)2(SO4)(H2O)2 monoclinic C2 [7]
Hg2(SeO3)(SO4) monoclinic P21/c a 6.3799 b 7.0185 c 13.4426 β 94.511° birefringence 0.133 at 532 nm and 0.126 at 1064 nm [5]
Hg3(SeO3)2(SO4) monoclinic P21 a 8.1991 b 5.2677 c 11.1199 β 108.399(6)° white; band gap (4.70 eV; SHG 1.3 ×KDP) [8]
La2Hg3(SeO3)4(SO4)2(H2O)2 triclinic P1 a 9.1127 b 9.2446 c 13.5562 α 86.099° β 79.267° γ 61.814° [5]
Munakataite Pb2Cu2(Se4+O3)(SO4)(OH)4 monoclinic P21/m a = 9.802 b = 5.675 c = 9.281 β = 102.443 Z = 2 504.2 [9]

References

  1. ^
    ISSN 0020-1669
    .
  2. S2CID 218907334
    .
  3. S2CID 131877389
    .
  4. doi:10.5012/bkcs.2007.28.8.1416
    .
  5. ^
    S2CID 252698858
    .
  6. ^ Eaton, Teresa (2016). "Lanthanide and Actinide Selenites".
  7. ^
    ISSN 0044-8249
    .
  8. S2CID 258988391
    .
  9. S2CID 129298210
    .
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