Synthesis, Structure, and Physical Properties of a Novel Quaternary Niobium Telluride, Nb2FeCu0.35Te4

Jing Li, Frank McCulley, Mark J. Dioszeghy, S. C. Chen, K. V. Ramanujachary, M. Greenblatt

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Abstract

Nb2FeCu0.35Te4, the first solid-state quaternary niobium telluride, was prepared via chemical vapor transport reactions. The structure of this compound was determined by single-crystal X-ray diffraction methods. It crystallizes in the orthorhombic system, space group Pmmn (No. 59). The unit cell dimensions are a = 12.576(1) Å, b = 3.8395(6) Å, c = 7.3012(9) Å, Z = 2, and V = 352.54(8) Å3 123. Structural refinement with 433 observed reflections (I> 3 (σ(I)) and 40 variable parameters results in R = 4.0% and Rw = 4.8%. Nb2FeCu0.35Te4 represents a novel three-dimensional structure type with interesting structural features and one-dimensional extended metal-metal bonds. The structure can be described as constructed from “Nb4Fe2Cu2Te11” building units. These building units stack on top of each other along the crystallographic b-axis to form a one-dimensional chain. The interchain connections are made through Cu-Te(3) bonds along the c-axis and Nb-Te(3) bonds along the a-axis resulting in a three-dimensional network with open channels running along the ¿-axis. The one-dimensional metal-metal bonds extend along the b-axis. A positional disorder was observed for both Nb and Fe sites, and all three metal atoms are partially occupied. Nb2FeCu0.35Te4 shows degenerate semiconductor behavior with a room-temperature resistivity of 3.6(2) × 10-3 Ω-cm and an antiferromagnetic ordering at 8 K. The temperature-dependent magnetic susceptibility follows modified (nonlinear) Curie-Weiss behavior with μeff = 1.26 μB.

Original languageEnglish
Pages (from-to)2109-2114
Number of pages6
JournalInorganic Chemistry
Volume33
Issue number10
DOIs
Publication statusPublished - May 1 1994

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Li, J., McCulley, F., Dioszeghy, M. J., Chen, S. C., Ramanujachary, K. V., & Greenblatt, M. (1994). Synthesis, Structure, and Physical Properties of a Novel Quaternary Niobium Telluride, Nb2FeCu0.35Te4. Inorganic Chemistry, 33(10), 2109-2114. https://doi.org/10.1021/ic00088a010