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
editSome members of this group of materials like mcgovernite has an extremely high unit cell dimension of 204 Å.[1]
Related
editMixed valence pnictide compounds related to the arsenate arsenites include the nitrite nitrates, and phosphate phosphites.
List
edit| name | formula | ratio
AsO4:AsO3 |
system | space group | unit cell Å | volume | density | properties | references |
|---|---|---|---|---|---|---|---|---|---|
| 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
edit- ^ Moore, P. B.; Araki, T (1 February 1978). "Hematolite; a complex dense-packed sheet structure" (PDF). American Mineralogist. 63 (1–2): 150–159.
- ^ 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. doi:10.1107/S0567740880003433. ISSN 0567-7408.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "Synadelphite". Mindat.
- ^ "Hematolite". Mindat.
- ^ 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.
- ^ "Turtmannite". Mindat.
- ^ "Carlfrancisite". Mindat.
- ^ 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.
- ^ "Dixenite". Mindat.
- ^ "Arakiite". Mindat.
- ^ "Kraisslite". Mindat.
- ^ "Mcgovernite". Mindat.
- ^ 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.
- ^ 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.
- ^ 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. doi:10.1016/j.jssc.2012.08.019.
- ^ 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.