Tellurogallates are chemical compounds which contain anionic units of tellurium connected to gallium. They can be considered as gallates where tellurium substitutes for oxygen. Similar compounds include the thiogallates, selenogallates, telluroaluminates, telluroindates and thiostannates. They are in the category of chalcogenotrielates or more broadly tellurometallates or chalcogenometallates.
Formation Tellurogallates may be produced by heating a metal with gallium and tellurium in a sealed tube.
Properties Some tellurogallates are semiconductors
Use Tellurogallates are primarily of research interest. They are investigated for their infrared, thermoelectric and semiconductor characteristics.
List namechemmwcrystal systemspace groupunit cell ÅvolumedensitycommentCAS noreferenceslithium tellurogallateLiGaTe2321.86tetragonalI2da=6.338 c=11.704 Z=16470.12.937orange to black; band gap 2.41 eVsodium trigallium pentatellurideNaGa3Te5trigonalR32a=14.58 c=17.761 Z=123269.55.272black[(C6H5)4P]GaTe2(en)2 en = ethane-1,2-diaminemonoclinicC2/ca=20.680 b=5.3877 c=27.192 β=19.13° 3029.61.720orangeKGaTe2monoclinicC2/ca=11.768, b=11.775, c=16.503, β=100.36°, Z=16KGaTe2triclinicP1 or Pa=8.34 b=8.34 c=64.4 αβγ~90°4479.44.30hexapotassium di-μ-telluridobis (ditelluridogallate)K6Ga2Te6monoclinicP121/c1a = 8.616, b = 13.685, c = 11.290, β = 127.61°, Ζ = 21054.6K[K(crown-6)]2[GaTe3] · 2CH3CNmonoclinicC2/ma=24.469 b=14.073 c=12.875 β=94.47 Z=443691.784yellow (@113K)CaGa6Te10monoclinicC2a=14.40 b=14.40 c=10.21 β=90.0 Z=42117.1Cr3(GaTe3)2amorphousMnGa2Te4monoclinicC2/ca=11.999, b=11.999, c=24.922, β=104.01°, Z=16MnGa2Te4orthorhombicPnmaa = 27.448, b = 4.192, c = 6.993 Z=4804.65.82Fe3(GaTe3)2amorphousCo3(GaTe3)2amorphousNi3−xGaTe2P63/mmca=3.9393 c=15.7933 Z=2Ni2FeGaTeP63/mmca=3.962 c=15.868 Z=2215.7CuGaTe2I2da = 6.02348, c = 11.93979433.2ZnGa2Te4Ia=5.930, c=11.859 Z=25.7ZnGa2Te4tetragonalI2ma=6.922 c=11.809ZnGa2Te4F3ma=5.843 Z=1/2AgGaTe2I2da=6.320 c=11.986 Z=26.052melt 725.7 °C; heat of fusion= 104.8 J/g−1AgGa5Te8tetragonalI41/aa=8.415 c=47.877Ag2Ga6Te10Ag9GaTe6hexagonalmelt 710 °C Low thermal conductivityCdGa2Te4tetragonala=5.742 c=10.730InGaTe2tetragonalI4/mcma = 8.412, c = 6.875; Z = 4; In2Ga6Te10trigonalR32a=10.34 alpha=89.7 Z=125.78SnGa6Te10trigonalP3121/6a=14.408 c=17.678 Z=631785.684blackSnxGa1-xTe x=1/2cubica=6.315251.84β-BaGa2Te4orthorhombicImmaa = 23.813, b = 11.967, c = 6.7215Ba5Ga2Ge3Te12monoclinicP21/ca = 13.6540, b = 9.6705, and c = 23.1134 β =91.829LaGaITe2orthorhombicPmc21CeGaITe2orthorhombicPmc21PrGaITe2orthorhombicPmc21NdGaITe2orthorhombicPmc21Eu0.81Ga2Te4tetragonalI4/mcma = 8.2880, c = 6.744, Z = 2463.24HgGa2Te4cubicF3ma=6.002 Z=1216.22HgGa2Te4tetragonalI2ma=6.025 c=12.037 Z=2436.95blackTlGaTe2tetragonalI4/mmm D184ha=8.429 c=6.865band gap 0.84 eVTl2InGaTe4tetragonalI4mcmPbGa6Te10trigonalP3221/6a=14.465 c=17.718 Z=632105.898black
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