Arsenate arsenite

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Yellow spherules of halilsarpite, an arsenate arsenite mineral, on orange-brown smolyaninovite Halilsarpite.jpg
Yellow spherules of halilsarpite, an arsenate arsenite mineral, on orange-brown smolyaninovite

An arsenate arsenite is a chemical compound or salt that contains arsenate and arsenite anions (AsO33- and AsO43-). These are mixed anion compounds or mixed valence compounds. Some have third anions. Most known substances are minerals, but a few artificial arsenate arsenite compounds have been made. Many of the minerals are in the Hematolite Group.

Contents

An arsenate arsenite compound may also be called an arsenite arsenate.

Properties

Some members of this group of materials like mcgovernite has an extremely high unit cell dimension of 204 Å. [1]

Mixed valence pnictide compounds related to the arsenate arsenites include the nitrite nitrates, and phosphate phosphites.

List

nameformularatio

AsO4:AsO3

system space group unit cell Åvolumedensitypropertiesreferences
Arsenic dioxide AsO21:1orthorhomnicPnmaa=8.597 b=5.235 c=7.269 Z=8327.14.382 [2]
Arsenic(III) Arsenic(V) Oxide HydroxideAs3O5(OH)1:2monoclinicP21/ca = 12.504 b = 4.593 c = 10.976 β = 118.08° Z = 4556.23.84 [3]
H6As3+7As5+7O311:1hexagonalP63a = 12.0525 c = 4.7344 Z = 2595.6 [4]
Segerstromite Ca3(As5+O4)2[As3+(OH)3]22:1cubicI213a = 10.7627 Z = 41246.713.46colourless; refract index: n = 1.731 [5]
Synadelphite Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O2:1OrthorhombicPnmaa = 10.75 b = 18.86c = 9.88 Z=420053.58red; Biaxial (+); refract index: nα = 1.750 - 1.870 nβ = 1.751 - 1.880 nγ = 1.761 - 1.930 [6]
Hematolite (Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)232:1trigonalR3a = 8.275 Å, c = 36.60 Å Z=32,170.43.49deep red; Uniaxial (-) refractive index nω = 1.733 nε = 1.714; Birefringence: 0.019 [7] [8]
Turtmannite (Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+xtrigonala = 8.259 c = 204.3 Z=1212,0683.8light yellow; Uniaxial (-); refractive index: nε = 1.787 [9]
Carlfrancisite Mn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42trigonalR3ca = 8.2238 c = 205.113 Z=612,013.53.620yellow-orange; Uniaxial (+) refractive index: nω = 1.756(2) nε = 1.758 Birefringence: δ = 0.002 [10]
K2Cu3(As2O6)21:1monoclinicC2ma=10.359 b=5.388 c=11.234 β=110.48°[As(V)As(III)O6]4− [11]
Dixenite CuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)61:5trigonalR3a = 8.233 c = 37.499 Z=322014.35deep red-brown; Uniaxial (+) refractive index nω = 1.970 nε = 1.730 [12]
Arakiite (Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)232:1monoclinicCca = 14.248 b = 8.228 c = 24.23 β = 93.62° Z=428433.41orange-red brown; Biaxial (-); refract index: nα = 1.723 nβ = 1.744 nγ = 1.750

Birefringence: 0.027

 [13]
Kraisslite Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)165:1OrthorhombicC2221a = 8.1821 b = 14.1946 c = 43.9103 Z=45099.83.876pale red; Uniaxial (+) Refractive index: nε = 1.805 [14]
Mcgovernite Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)213:1trigonalR3m or R3ma = 8.22 c = 203.1 Z=611,887.523.719brown; Uniaxial (+) Refractive index: nω = 1.757 nε = 1.760

Birefringence: δ = 0.003

 [15]
Halilsarpite [Mg(H2O)6][CaAs3+2(Fe3+2.67Mo6+0.33)(AsO4)2O7]orthorhomnicImmaa = 26.489 b = 7.4205 c = 10.43782051.7lemon yellow; Biaxial (-) refractive index: nα = 1.646 nβ = 1.765(5) nγ = 1.815(5) 2V: 62° Max Birefringence: δ = 0.169 [16]
Wiklundite Pb2(Mn2+,Zn)3(Fe3+,Mn2+)2(Mn2+,Mg)19(As3+O3)2[(Si,As5+)O4]6(OH)18Cl6hexagonal? R3ca = 8.257 c = 126.59 Z = 674744.072dark reddish brown [17]
Bi8O6(AsO3)2(AsO4)2monoclinicI2/aa=24.372 b=5.528 c=29.90 β=99.058 Z=839787.652colourless [18]
Th(AsIII4AsV4O18)1:1monoclinicC2/ca=18.2148 b 5.19792 c=17.3588 β=99.1298 Z=41622.704.582colourless [19]

References

  1. ↑ Moore, P. B.; Araki, T (1 February 1978). "Hematolite; a complex dense-packed sheet structure" (PDF). American Mineralogist. 63 (1–2): 150–159.
  2. ↑ Jones, P. G.; Beesk, W.; Sheldrick, G. M.; Sharman, E. (1980-02-01). "Arsenic dioxide" . Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 36 (2): 439–440. Bibcode:1980AcCrB..36..439J. doi:10.1107/S0567740880003433. ISSN   0567-7408.
  3. ↑ Bodenstein, Doris; Brehm, Axel; Jones, Peter G.; Schwarzmann, Einhard; Sheldrick, George M. (1982-02-01). "Darstellung und Kristallstruktur vom Arsen(III)arsen(V)oxidhydroxid As 3 O 5 (0H) / Preparation and Crystal Structure of the Arsenic(III) Arsenic(V) Oxide Hydroxide As 3 O 5 (OH)". Zeitschrift für Naturforschung B. 37 (2): 138–140. doi: 10.1515/znb-1982-0204 . ISSN   1865-7117. S2CID   96596612.
  4. ↑ Orosel, Denis; Dinnebier, Robert E.; Balog, Paul; Jansen, Martin (July 2007). "The crystal structure of a new mixed valence arsenic(III,V)oxoacid H 6 As 3+ 7 As 5+ 7 O 31" . Zeitschrift für Kristallographie. 222 (7): 321–325. Bibcode:2007ZK....222..321O. doi:10.1524/zkri.2007.222.7.321. ISSN   0044-2968. S2CID   95624012.
  5. ↑ Yang, Hexiong; Downs, Robert T.; Jenkins, Robert A.; Evans, Stanley H. (2018-09-01). "Segerstromite, Ca3(As5+O4)2[As3+(OH)3]2, the first mineral containing As3+(OH)3, the arsenite molecule, from the Cobriza mine in the Atacama Region, Chile" . American Mineralogist. 103 (9): 1497–1501. Bibcode:2018AmMin.103.1497Y. doi:10.2138/am-2018-6329. ISSN   0003-004X. S2CID   106199868.
  6. ↑ "Synadelphite". Mindat.
  7. ↑ "Hematolite". Mindat.
  8. ↑ Dunn, Pete J.; Peacor, Donald R. (September 1983). "A ferric iron equivalent of hematolite from Sterling Hill, New Jersey and Långban, Sweden" . Mineralogical Magazine. 47 (344): 381–385. Bibcode:1983MinM...47..381D. doi:10.1180/minmag.1983.047.344.15. ISSN   0026-461X. S2CID   129662981.
  9. ↑ "Turtmannite". Mindat.
  10. ↑ "Carlfrancisite". Mindat.
  11. ↑ Effenberger, H.; Pertlik, F. (October 1987). "[As(V)As(III)O6]4−: An uncommon anion group in the crystal structure of K2Cu3(As2O6)2" . Journal of Solid State Chemistry. 70 (2): 219–224. Bibcode:1987JSSCh..70..219E. doi:10.1016/0022-4596(87)90059-4.
  12. ↑ "Dixenite". Mindat.
  13. ↑ "Arakiite". Mindat.
  14. ↑ "Kraisslite". Mindat.
  15. ↑ "Mcgovernite". Mindat.
  16. ↑ Husdal, Tomas; Grey, Ian E.; Friis, Henrik; Dal Bo, Fabrice; Kampf, Anthony R.; MacRae, Colin M.; Mumme, W. Gus; Ljøstad, Ole-Thorstein; Shanks, Finlay (2020-01-23). "Halilsarpite, a new arsenate analogue of walentaite, from the Oumlil mine, Bou Azzer district, Morocco". European Journal of Mineralogy. 32 (1): 89–98. Bibcode:2020EJMin..32...89H. doi: 10.5194/ejm-32-89-2020 . hdl: 10852/76149 . ISSN   1617-4011. S2CID   211082062.
  17. ↑ Cooper, Mark A.; Hawthorne, Frank C.; Langhof, Jörgen; Hålenius, Ulf; Holtstam, Dan (August 2017). "Wiklundite, ideally Pb 2 [4] (Mn 2+ ,Zn) 3 (Fe 3+ ,Mn 2+ ) 2 (Mn 2+ ,Mg) 19 (As 3+ O 3 ) 2 [(Si,As 5+ )O 4 ] 6 (OH) 18 Cl 6 , a new mineral from Långban, Filipstad, Värmland, Sweden: Description and crystal structure" . Mineralogical Magazine. 81 (4): 841–855. Bibcode:2017MinM...81..841C. doi:10.1180/minmag.2016.080.136. ISSN   0026-461X. S2CID   103754064.
  18. ↑ Liu, Jun-Hui; Kong, Fang; Gai, Yan-Li; Mao, Jiang-Gao (January 2013). "Syntheses, crystal structures and characterizations of two new bismuth(III) arsenites" . Journal of Solid State Chemistry. 197: 228–235. Bibcode:2013JSSCh.197..228L. doi:10.1016/j.jssc.2012.08.019.
  19. ↑ Yu, Na; Klepov, Vladislav V.; Kegler, Philip; Bosbach, Dirk; Albrecht-Schmitt, Thomas E.; Alekseev, Evgeny V. (2014-08-18). "Th(As III 4 As V 4 O 18 ): a Mixed-Valent Oxoarsenic(III)/arsenic(V) Actinide Compound Obtained under Extreme Conditions" . Inorganic Chemistry. 53 (16): 8194–8196. doi:10.1021/ic5013704. ISSN   0020-1669. PMID   25075555.
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