Phosphide bromides or bromide phosphides are compounds containing anions composed of bromide (Br−) and phosphide (P3−) anions. Usually phosphorus is covalently connected into more complex structures. They can be considered as mixed anion compounds. They are in the category of pnictidehalides. Related compounds include the phosphide chlorides, phosphide iodides, nitride bromides, arsenide bromides, and antimonide bromides.
List formulasystemspace groupunit cell ÅvolumedensitycommentrefCa2PBrcubicI3da=5.96 Z=2red brownCa2PBrhexagonalRma=4.23 c=20.9 Z=3Cu12P20Br10triclinicPa = 9.886, b = 13.190, c = 14.763, α = 70.83°, β = 82.68°, γ = 80.13°, Z = 21786.1Cu13P15Br12Cu6PS5BrcubicP3ma=9.732 Z=4921.84.701red(CuBr)2P8Se3orthorhombicPbcma=8.761 b=11.957 c=13.858 Z=41451.8Sr2PBrcubicI3da=9.31 Z=2brown violetSr2PBrhexagonalRma=4.44 c=22.0 Z=3dark reddish brownSr2P7BrcubicP213a=9.789 Z=4938.03.342red band gap 2.1 eVY2PBr2rhombohedrala=3.9807 c=29.250Ag6PS5BrcubicP3ma=10.3765 Z=41117.265.460redCd5P2Br4orthorhombicPna21a=12.189, b=7.7080, c=13.664Sn24P19.3Br8Sn17Zn7P22Br8cubicPmna=10.7449Sn24−xInxP19.2+0.2x x<16cubicPmnSi30+xP16–xTe8–xBrx x = 1–6.4cubicPmna=9.9720 - 10.0405Ba2PBrhexagonalRma=4.67 c=23.3 Z=3Ba2P7BrmonoclinicP21/ma=6.294 b=6.835 c=11.850 β=95.819 Z=2507.23.742orangeLa2PBr2trigonalPm1a=4.311 c=11.000 Z=1177.045.28La3Zn4P6.6Br0.8orthorhombicCmcma=4.099 b=14.229 c=20.388 Z=41189.05.290blackEu2PBrR3ma = 4.385, c = 21.90, Z = 3W4(PBr)Br10monoclinicC12/m1a=14.0933 b=10.3228 c=11.8169 β=93.906 Z=41715.16dark greenHg2P3BrorthorhombicPbcna = 8.014, b = 8.902, c = 7.823, Z = 4Hg7P4Br6monoclinicP21/ca = 6.0452, b = 19.848, c = 7.5596 β = 104.214° Z=2879.37.582brown(Hg2P)2HgBr4monoclinicP21a=7.776 b=12.226 c=7.930 β=121.34 Z=2643.97.141discovered in 1907; bright yellow; air with light sensitive[Hg7P4Br3](SnBr3)cubicP213a=12.490 Z=4
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