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Triclinic niobium(V) iodide was prepared from the elements at an iodine pressure of 3-4 bar in a temperature gradient from 400 to 230 °C. It crystallizes in the space group P1̄ with a = 7.591(3), b = 10,322(3), c = 6.977(3) Å, α = 90.93(3), β = 116.17(3), γ = 109.07(3)°, Z = 2 Nbls. The single-crystal X-ray structure analysis shows the compound to contain dimeric Nb2I10 molecules with Nb-I bond lengths of 2.933 and 2.939(1) A for the bridge bonds and of 2.639···2.720(1) Å for the terminaldoi:10.1515/znb-1980-0105 fatcat:pd6l7yxglfebbooksm42eoezmu