Ta1.09Fe2.39Te4, a new non-stoichiometric ternary TANTALUM TELLURIDE (cas 12067-66-2)
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Add time:07/31/2019 Source:sciencedirect.com
Ta1.09Fe2.39Te4 was prepared by chemical transport from the elements in sealed silica tubes in a temperature gradient from 700 to 600 °C. It crystallizes in the monoclinic space group P2/m with a = 6.162(2) Å, b = 7.852(3) Å, c = 7.250(3) Å, β = 95.32(3)° and Z = 2. Its structure can be derived from a hexagonal close packing of tellurium atoms with tantalum and iron atoms in octahedral voids and additional iron atoms in tetrahedral voids. The structure is closely related to the structures of MM'Te2 (MNb, Ta; M′Fe, Co, Ni) and MxFeγTe2 (MNb, x = 0.89, γ = 0.93; MTa, x = 0.77, γ = 0.90).
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