The arsenite bromides are mixed anion compounds containing both arsenite and bromide ions. Similar compounds include arsenate bromides, arsenite chlorides, antimonite bromides, antimonite chlorides, and ...
They are in the category of halide oxidoarsenates(III)
List chemmwcrystal system space groupunit cell ÅvolumedensitycommentreferencesErmakovite(NH4)(As2O3)2BrhexagonalP6/mmma = 5.271 c = 9.157 Z = 1220.33.64uniaxial (–), ω = 1.960 ɛ = 1.716 at 589 nmIn4(As2O5)(As3O7)Br3triclinicPa=7.998 b=10.532 c=11.952 α=70.92° β=79.62° γ=80.27° Z=29284.527stable to 530°CLa3OBr[AsO3]2tetragonalP42/mnm a = 13.043 c = 5.6127 Z=4954.85.27colourlessCe3OBr[AsO3]2Nd3OBr[AsO3]2Sm3OBr[AsO3]2Gd3OBr[AsO3]2Tb3OBr[AsO3]2Tm3Br2[As2O5][AsO3]triclinicPa = 5.3496 b = 8.6926 c = 10.8184 α = 90.723° β = 94.792° γ = 90.119° Z=26.760pale yellowBeudantitePbFe3(OH)6SO4AsO4trigonalRma = 7.32, c = 17.02 Z=3789.794.48Uniaxial (-) nω = 1.957 nε = 1.943 Birefringence: 0.014GallobeudantitePbGa3(AsO4)(SO4)(OH)6trigonalR3ma = 7.225, c = 17.03 Z=3769.884.87uniaxial (–) nω = 1.763 nε = 1.750
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