Arsenite bromides
Appearance
The arsenite chlorides are mixed anion compounds containing both arsenite and bromide ions.
List
chem | mw | crystal system | space group | unit cell | volume | density | comment | references | |
---|---|---|---|---|---|---|---|---|---|
In4(As2O5)(As3O7)Br3 | P1_ | a=7.998 b=10.532 c=11.952 α=70.92° β=79.62° γ=80.27° Z=2 | 928 | 4.527 | stable to 530°C | [1] | |||
Beudantite | PbFe3(OH)6SO4AsO4 | trigonal | R3_m | a = 7.32, c = 17.02 Z=3 | 789.79 | 4.48 | Uniaxial (-) nω = 1.957 nε = 1.943 Birefringence: 0.014 | [2] | |
Gallobeudantite | PbGa3(AsO4)(SO4)(OH)6 | trigonal | R3m | a = 7.225, c = 17.03 Z=3 | 769.88 | 4.87 | uniaxial (–) nω = 1.763 nε = 1.750 | [3] |
References
- ^ Pekov, Igor V.; Britvin, Sergey N.; Krivovichev, Sergey V.; Yapaskurt, Vasiliy O.; Vigasina, Marina F.; Turchkova, Anna G.; Sidorov, Evgeny G. (1 April 2021). "Vasilseverginite, Cu9O4(AsO4)2(SO4)2, a new fumarolic mineral with a hybrid structure containing novel anion-centered tetrahedral structural units". American Mineralogist. 106 (4): 633–640. doi:10.2138/am-2020-7611.
- ^ "Beudantite". www.mindat.org. Retrieved 2022-05-25.
- ^ "Gallobeudantite". www.mindat.org. Retrieved 2022-05-24.