Abstract
AbstractA new short series of isostructural lanthanoid(III) nitride tellurides with the composition Ln3NTe3 (Ln = Gd–Ho) was synthesized through reactions of the metal (Gd–Ho) with sodium azide (NaN3), tellurium (Te), iodine (I2) and sodium iodide (NaI) as flux in evacuated fused silica tubes for seven days at 950 °C. Black, brick‐shaped single crystals of the Ln3NTe3 represenatives crystallize isotypically with Y3NTe3 in the monoclinic space group P21/c with lattice parameters ranging from a = 815.28(6), b = 1200.92(8), c = 866.07(6) pm and β = 109.092(3)° for Gd3NTe3 to a = 802.37(6), b = 1181.69(8), c = 857.30(6) pm and β = 108.816(3)° for Ho3NTe3 and Z = 4. Three crystallographically independent Ln3+ cations form the basic framework of their crystal structure and are coordinated by six anions each. One trigonal prism and two octahedra with different grades of distortion appear as coordination spheres. Isolated dimers [N2Ln6]12+ (d(N–Ln) = 219–232 pm) as pairs of two edge‐sharing [NLn4]9+ tetrahedra, however, serve as main structural feature. Their three‐dimensional interconnection and charge compensation is achieved by three crystallographically distinct Te2– anions (d(Te–Ln) = 299–337 pm) with contacts to four or five Ln3+ cations each. Finally, this short Ln3NTe3 series closes an information gap between the lanthanoid(III) nitride tellurides and the well‐investigated, but not isotypic nitride sulfides and selenides with the same composition (Ln3NCh3: Ln = La–Nd, Sm, Gd–Dy; Ch = S and Se).
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