The telluride phosphides are a class of mixed anion compounds containing both telluride and phosphide ions (Te2− P3−). The phosphidotelluride or telluridophosphide compounds have a [TeP]3− group in which the tellurium atom has a bond to the phosphorus atom. A formal charge of −2 is on the phosphorus and −1 on the tellurium. There is no binary compound of tellurium and phosphorus. Not many telluride phosphides are known, but they have been discovered for noble metals, actinides, and group 4 elements.
Structure The titanium group elements form layered hexagonal crystals that can be exfoliated to monolayers. These contain ditelluride Te22- units. These layered compounds can be intercalated to form non-stoichiometric compounds with zinc, copper or cadmium by heating with the metals. Actinide telluride phosphides contain diphosphide anions P2.
List nameformulaMWratio Te:Psystemspace groupunit cell Åvolumedensityopticalband gapCASreferencesP4S2TemolecularP4STe2molecularTi2PTe2hexagonalRma=3.6387 c=28.486metallicon c axisalso monolayerMnxTi2PTe2Rm1a=3.648 c=9.628FexTi2PTe2Rm1a=3.6356 c=9.639Cu0.282Ti2PTe2Rm1a=3.6726 c=9.7822Zn0.36Ti2PTe2Rm1a=3.6917 c=9.8480CdxTi2PTe2Rm1a=3.6806 c=10.238Zr2PTe2rhombohedralRma=3.8117 c=29.189 Z=3367.276.356blackalso monolayerCuxZr2PTe2Rm1a=3.8445 c=10.1082Zn0.337Zr2PTe2Rm1a=3.85873 c=10.1664Cd0.194Zr2PTe2Rm1a=3.8469 c=10.4197RuTePBaP4TeorthorhombicPnma witha =16.486 b =6.484 c =7.076 Z =4CeP0.4Te1.6 CeP1.1Te0.9 cerium phosphide telluride Ce3Te3P3:1Hf2Te2PRma=3.7946 c=29.14also monolayerIrTePorthorhombica=6.030 b=6.131 c=12.132OsTeP1:1arsenopyrite structureP21/ca = 6.2291 b = 6.1604 c = 6.2449 β = 112.01°222.210.43ThPTe1:1tetragonala = 4.2505 and c = 17.268UPTetetragonala=4.100 c=17.026U2PTe2Opseudo tetragonala = 40.37c = 32.07NpPTetetragonalP4/nmma=4.265 c=9.067PuPTetetragonalP4/nmma=4.289 c=9.098AmPTetetragonalP4/nmma=4.269 c=9.050
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