Carbide iodides are mixed anion compounds containing iodide and carbide anions. Many carbide iodides are cluster compounds, containing one, two or more carbon atoms in a core, surrounded by a layer of metal atoms, and encased in a shell of iodide ions. These ions may be shared between clusters to form chains, double chains or layers.
The metal in carbide iodides is most often a rare earth element. Similar formulas tend to have similar structures. Where R is a rare earth element: R12C6I17 contains chains of R6 octahedra with a C26− core and a shell of iodide. R4I5C contains similar chains, but with a single C4− carbide atom. Double chain structures with single carbon atom cores include R6I7C2 and R3I3C. Layers of joined octahedra include R2I2C2 with an ethanide C24− core; R2I2C and R2IC with one carbide per octahedron.
Related compounds include carbide chlorides, and carbide bromides. Carbon may be substituted by hydrogen, boron or nitrogen in the core of cluster compounds.
This list does not include cyanides, carbonyls, cyanamides or carbido borates, where carbon has bonds to other non-metals. However, there are carbide iodides that also contain nitride, oxide or other halides.
List Do not confuse Cl for chlorine, and CI for carbon and iodine. formulasystemspace groupunit cellvolumedensitycommentreferenceSc2I3CtriclinicPa=10.793, b=10.803, c=13.959, α=87.8, β=73.04, γ=60.84,76blackSc4C2I6triclinicPa=10.803 b=13.959 c=10.793 α=106.96° β=119.20° γ=87.80° Z=4linear chainsSc6C2I11triclinicPa=10.046 b=14.152 c=9.030 α=104.36° β=110.45° γ=89.27° Z=24.83blackSc7CI12trigonalR3a=14.717 c=9.847 Z=34.99dark purple; dissolves in N,N-dimethylacetamideSc24C10I30trigonalPaa=25.5182, c=25.51824.00black; supertetrahedron of C10Y2C2I2monoclinicC12/m1a=7174, b=3.866, c=10.412 β=92.98,5.25bronze; superconductor Tc=9.97KY2I2CtrigonalPm1a=3.922 c=10.4045.32olive greenY4I5CmonoclincC2/ma=18.479 b=3.947 c=8.472 β=103.22°5.53dark red; chainsY5C2I9monoclinicC12/c1a=18.479, b=3947, c=8472, β=103.22°4.97blackY6C2I7monoclincC2/ma=21.557 b=3.909 c=12.374 β=123.55°5.53black; twin chainY10C2I13monoclincC2/ma=21.317 b=3.95 c=19.889 β=97.40° Z=2blackY19C6I34triclinicPa=9.3683, b=10.341, c=22.173, α=79.104, β=88.175, γ=69.277 Z=11970.85.12blackY10C2I13monoclinicC12/m1a=21.317, b=3.957, c19.899, β=97.4°5.11blackY19C6I34triclinicPa=93683, b=10.341, c=22.173, α=79.104°, β=88.175°, γ=69.277°5.12blackY16B4C8I19triclinicPa=12.311, b=13.996, c=19.695, α=74.96, β=89.51, γ=67.034.40blueY21B7C14I18triclinicPa=10.66, b=15.546, c=18.416, α=82.49, β=85.01, γ=82.92 Z=229954.87Y6C2I9NhexagonalP6a=20.275, c=13.0254.91brownY7C2I12NtriclinicPa=9.7124, b=10.3038, c=16.7358, α=101.366, β=92.758, γ=112.7994.84olive greenY7C3I6OorthorhombicPmmaa=22.494, b=3.837, c=10.7915.12bronze[Y9C4O]I8orthorhombicPmmna = 29.127, b = 3.8417, c = 10.80.29, Z = 25.16blackY16C7I14O2monoclinicC2/ma=51.6, b=3.84, c=10.8, β=935.15YCI0.75l0.25CmonoclinicC2/ma=7.127, b=3.839, c=10.441, β=93.844.78YI0.75CBr0.25monoclinicC2/ma=7.131, b=3.847, c=10.358, β=93.735.06Zr6CI12trigonalRa=14.508, c=10.0075.69Zr6CI14orthorhombicCmcea=15.69, b=14.218, c=12.8085.43K0.58Zr6CI14 orthorhombicCmcaa=15.727, b=14.278, c=12798 5.54RbZr6I14CorthorhombicCmcaa=15.768, b=14.296, c=12.8495.55CsY10C4I18triclinicPa=11.138, b=11.201, c=11.325, α=66.92, β=87.26, γ=60.87 Z=11117.24.99blackCs2Zr7I18CtrigonalRca=10.744, c=29.4095.42CsZr6I14CorthorhombicCmcaa=15.803, b=14.305, c=12.9345.61Cs2Zr7I18CtrigonalRa = 10.744, c = 29.409 Z=34.99blackLaICmonoclinicC12/m1a=7.619, b=4.1252, c=10.7513, β=93.1435.47bronzeLaICmonoclinicC12/m1a=7.6132, b=4.1324, c=10.859, β=100.8355.50bronzeLa3I5CtriclinicPa=7.955, b=9.687, c=9.728, α=107.81, β=97.34, γ=105.565.28violetLa3C2I3orthorhombicC2221a=12.026 b=17.739 c=17.7355.77blackLa4C1.5I5monoclinicC2/ma = 19.849, b = 4.1410, c = 8.956, β = 103.86°5.62metallic greyLa4C2I5orthorhombicImmma = 19.907, b = 4.1482, c = 8.963, β = 104.36°La5C2I9orthorhombicPbcaa = 8.025, b = 16.887, c = 35.886 Z=848635.08>850° metallic greenLa5C2I9triclinicPa = 8.006, b = 10.088, c = 14.383, α = 79.34°, β = 80.75° and γ = 85.07° Z=21124.95.494<800 °C; dark red; air sensitiveLa6I10(C2)triclinicPa = 9.687, b = 9.728, c = 7.955, α = 97.34°, β = 105.56° and γ = 107.81° Z=1699.335.276violet; air sensitiveLa7C3I10triclinicPa=9.761, b=11.79, c=14.055, α=79.6, β=71.49, γ=65.795.42greenish blackLa10C4I15triclinicPa=9.747, b=10.655, c=11.736, α=93.68, β=114.44, γ=109.285.45dark redLa10I15(C2)2triclinicPa = 9.747, b = 10.655, c = 11.736, α = 93.68°, β = 114.44° and γ = 109.28° Z=11018.395.447dark red; air sensitiveLa12I17(C2)3monoclinicC12/c1a= 19.927, b= 12.636, c = 19.399, β = 90.24(1)°, Ζ = 44884.65.30blackLa14(C2)3I20triclinicPa = 9.761, b = 11.790, c = 14.055, α = 79.60°, β = 71.49°, γ = 65.79°greenish blackLa4B2I5Cmonoclinica=23.303, b=4.299, c=18.991, β=126.22 5.30blackLa9B3C6I5orthorhombica=3.9481, b=33.857, c=8.2186.01La4I6CNtetragonala=13.953 c=9.8114.67olive greenLaCI0.75l0.25CmonoclinicC2/ma=7.5764, b=4.0758, c=10.7266, β=93.3845.12bronzeLaI0.75CBr0.25 monoclinicC2/ma=75857, b=4.0981, c=10.6782, β=93.2725.33bronzeCe3I5CtriclinicPa=7.875, b=9.588, c=9.648, α=107.69, β=97.24, γ=105.325.43violetCe5C2I9orthorhombicPbcaa = 7.9284, b = 16.714, c = 35.5305.27redCe6I10C2triclinicPa=9.588 b=9.648 c=7.875 α = 97.24°, β = 105.32° and γ = 107.69 Z=1652.35.432violetCe7C3I10triclinicPa=9.688, b=11.67, c=13.932, α=80.16, β=71.81, γ=65.885.57greenish blackCe12C6I17monoclinicC12/c1a=19.731, b=12.495, c=19.182, β=90.365.49black; chainsCe14(C2)3I20triclinicPa = 9.688, b = 11.670, c = 13.932, α = 80.16°, β = 71.81°, γ = 65.88°greenish back; semiconductorCe4B2I5Cmonoclinica=23.194, b=4.29, c=18.822, β=126.55.42blackCe8I6(C2)(N)2Ce4I6CNtetragonalP42/mnma = 13.877, c = 9.665 Z=41861.34.810brownCe6I9C2NhexagonalP6/ma = 41.774, c = 13.719 Z=32207345.179black; moisture sensitiveCe6I9C2NhexagonalP6/ma = 20.958, c = 13.793 Z=852465.117blackPr{Pr6C}I12blackPr7C3I10triclinicPa=9663, b=11.619, c=13.866, α=80.31, β=71.79, γ=65.95.64blackPr12(C2)3I17monoclinicC2/ca=19.610, b=12.406, c=19.062, β=90.45°5.62metallic greyNd2C2I2monoclinicC2/mlayeredNd12(C2)3I17monoclinicC2/ca=19.574, b=112.393, c=19.003, β=90.41°5.71blackRb{Pr6C2}I12triclinicPa = 9.601, b = 9.570, c = 10.034, α = 71.74, β = 70.69, γ = 72.38°, Z = 1805.65.11blackCs2[Pr6(C2)]I12triclinicPa=9.481, b=9.536, c=10.052; α=71.01; β=84,68, γ=89.37°; Z=1515.35.16blackCs4[Pr6(C2)]I13tetragonalI41/amda = 18.049; c = 12.5954.94blue-black with brassy lustreGd2IChexagonalP63/mmca=3.801, c=14.7928.14Gd3I3CmonoclinicP121/m1a=8.658, b=3.926, c=11.735, β=92.267.20bronze; twin chainsGd4I5CmonoclinicC2/ma=18.587 b=3.978 c=8.561 β=103.3chainsGd6C2I7monoclinicC2/ma=21.767 b=3.947 c=12.459 β=123.6twin chainsGd7I12CtrigonalRa=15.288 c=10.291Gd10C4I16triclinicPa=10.463 b=16.945 c=11.220 α=99.16 β=92.68 γ=88.066.18blackGd12(C2)3I17monoclinicC2/ca = 19.297, b = 12.201, c = 18.635, β = 90.37°6.13black; Gd6 octahedra containing C2Gd4I6CNtetragonala=13.578 c=9.3135.48brown red; air sensitiveGd4I6CNhexagonala=40.806 c=9.2325.65brown redGd19(C2)3I34triclinicPa = 9.4172, b = 10.339, c = 22.371, α = 79.00°, β = 88.32°, γ = 69.25° Z=12007.66.10black; air sensitive[Gd4(C2)](Cl, I)6tetragonalP4/mbma = 13.475, c = 12.125, Z = 2blackGd6C3I4.56Cl4.44 tetragonalP4/mbma=13.475, c=12.1255.18blackTb2IChexagonalP63/mmca=3.7707, c=14.668.40Tb2C2I2monoclinicC2/mlayeredDy2I3CorthorhombicPnnma=13.622, b=14.335, c=8.3965.82Dy5C2I9monoclinicP121/c1a=10.47, b=17.152, c=13.983, β=121.146.12blackDy7C2I12trigonalRa=15.233, c=10.6496.25blackDy12(C2)3I17monoclinicC2/ca=19.149, b=12.069, c=18.595, β=90.546.46black{(C2)2O2Dy12}I18hexagonalP6/ma = 20.2418, c = 12.9921, Z = 84610.16.22black{(C2)2O2Dy14}I24triclinicPa = 9.730, b = 10.330, c = 16.770, α = 101.42°, β = 92.72°, γ = 112.75°, Z = 21509.35.94blackHo7C2I12NtriclinicPa=9.688, b=10.287, c=16.678, α=101.31, β=92.78, γ=112.8 6.06brown red[Ho9C4O]I8orthorhombicPmmna=3.8157, b=28.867, c=10.7487.19Er4I5CmonoclinicC2ma=18.521 b=4.015 c=8.478 β=103.07Er6C2I7monoclinicC2/ma=21.375 b=3.869 c=12.319 β=123.50twin chains[Er9C4O]I8orthorhombicPmmna=3.8037, b=28.818, c=10.73817.29Cs[Er6C]I12trigonalRa=11.120 c=20.638 Z=3443.716.02black[Er14(C2)2(N)2]l24triclinicPa = 9.663, b = 10.276, c = 16.634, α =101.374°, β = 92.85°, γ = 112.83°, Z =21477.86.14red brownCsEr10(C2)2I18triclinicPa=11.052 b=11.120 c=11.229 α=66.01° β=87.14° γ=60.80° Z=1656.66.29black[Lu9C4O]I8orthorhombicPmmna=3.7575, b=28.333, c=10.63777.78
References