Arsenate arsenite
Appearance
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
[edit]Some members of this group of materials like mcgovernite has an extremely high unit cell dimension of 204 Å.[1]
Related
[edit]Mixed 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.