Arsenate arsenite

Chemical compound or salt

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.

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

## Properties

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

## Related

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

## List

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name  | formula  | ratio

AsO4:AsO3

| system  | space group | unit cell Å  | volume  | density  | properties  | references

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Arsenic dioxide | AsO2 | 1:1  | orthorhomnic  | Pnma | a=8.597 b=5.235 c=7.269 Z=8  | 327.1  | 4.382  |  | [2]
Arsenic(III) Arsenic(V) Oxide Hydroxide  | As3O5(OH)  | 1:2  | monoclinic  | P21/c | a = 12.504 b = 4.593 c = 10.976 β = 118.08° Z = 4  | 556.2  | 3.84  |  | [3]
| H6As3+7As5+7O31 | 1:1  | hexagonal  | P63 | a = 12.0525 c = 4.7344 Z = 2  | 595.6  |  |  | [4]
Segerstromite | Ca3(As5+O4)2[As3+(OH)3]2 | 2:1  | cubic  | I213  | a = 10.7627 Z = 4  | 1246.71  | 3.46  | colourless; refract index: n = 1.731  | [5]
Synadelphite | Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O  | 2:1  | Orthorhombic  | Pnma | a = 10.75 b = 18.86c = 9.88 Z=4  | 2005  | 3.58  | red; 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)23 | 2:1  | trigonal  | R3 | a = 8.275 Å, c = 36.60 Å Z=3  | 2,170.4  | 3.49  | deep 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+x |  | trigonal  |  | a = 8.259 c = 204.3 Z=12  | 12,068  | 3.8  | light 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)42 |  | trigonal  | R3c  | a = 8.2238 c = 205.113 Z=6  | 12,013.5  | 3.620  | yellow-orange; Uniaxial (+) refractive index: nω = 1.756(2) nε = 1.758 Birefringence: δ = 0.002  | [10]
| K2Cu3(As2O6)2 | 1:1  | monoclinic  | C2m | a=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)6 | 1:5  | trigonal  | R3  | a = 8.233 c = 37.499 Z=3  | 2201  | 4.35  | deep 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)23 | 2:1  | monoclinic  | Cc | a = 14.248 b = 8.228 c = 24.23 β = 93.62° Z=4  | 2843  | 3.41  | orange-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)16 | 5:1  | Orthorhombic  | C2221 | a = 8.1821 b = 14.1946 c = 43.9103 Z=4  | 5099.8  | 3.876  | pale red; Uniaxial (+) Refractive index: nε = 1.805  | [14]
Mcgovernite | Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21 | 3:1  | trigonal  | R3m or R3m | a = 8.22 c = 203.1 Z=6  | 11,887.52  | 3.719  | brown; 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]  |  | orthorhomnic  | Imma | a = 26.489 b = 7.4205 c = 10.4378  | 2051.7  |  | lemon 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)18Cl6 |  | hexagonal  | ? R3c | a = 8.257 c = 126.59 Z = 6  | 7474  | 4.072  | dark reddish brown  | [17]
| Bi8O6(AsO3)2(AsO4)2 |  | monoclinic  | I2/a | a=24.372 b=5.528 c=29.90 β=99.058 Z=8  | 3978  | 7.652  | colourless  | [18]
| Th(AsIII4AsV4O18)  | 1:1  | monoclinic  | C2/c | a=18.2148 b 5.19792 c=17.3588 β=99.1298 Z=4  | 1622.70  | 4.582  | colourless  | [19]

## References

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1. ^ Moore, P. B.; Araki, T (1 February 1978). "Hematolite; a complex dense-packed sheet structure" (PDF). American Mineralogist. 63 (1–2): 150–159.1–2&rft.pages=150-159&rft.date=1978-02-01&rft.aulast=Moore&rft.aufirst=P.+B.&rft.au=Araki,+T&rft_id=http://www.minsocam.org/ammin/AM63/AM63_150.pdf&rfr_id=info:sid/en.wikipedia.org:Arsenate+arsenite" class="Z3988">
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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Compounds containing the arsenate group

| H3AsO4 |  |  |  | He

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Li  | Be  | B  | C  | N  | O  | F  | Ne
Na3AsO4
NaH2AsO4
Na2HAsO4 | Mg  | AlAsO4 | Si  | P  | +SO4 | Cl  | Ar
KH2AsO4 | Ca3(AsO4)2 |  | Sc  | Ti  | V  | Cr  | Mn  | Fe  | Co  | Ni  | Cu3(AsO4)2 | Zn  | Ga  | Ge  | +AsO3 | Se  | Br  | Kr
Rb  | Sr  |  | Y  | Zr  | Nb  | Mo  | Tc  | Ru  | Rh  | Pd  | Ag3AsO4 | Cd  | In  | Sn  | Sb  | Te  | I  | Xe
Cs  | Ba  | *  | Lu  | Hf  | Ta  | W  | Re  | Os  | Ir  | Pt  | Au  | Hg  | Tl  | PbHAsO4 | Bi  | Po  | At  | Rn
Fr  | Ra  | **  | Lr  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og

*  | La  | Ce  | PrAsO4 | NdAsO4 | Pm  | SmAsO4 | EuAsO4 | Gd  | Tb  | Dy  | Ho  | Er  | Tm  | Yb
**  | Ac  | Th  | Pa  | U  | Np  | Pu  | Am  | Cm  | Bk  | Cf  | Es  | Fm  | Md  | No
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