A novel representative in the rare family of trivanadates, KMn2V3O10: synthesis, crystal structure and magnetic properties

作者:Yakubovich Olga; Shvanskaya Larisa; Pchelkina Zlata; Dimitrova Olga; Volkov Anatoliy; Volkova Olga; Vasiliev Alexander
来源:Acta Crystallographica Section B-Structural Science Crystal Engineering and Materials, 2018, 74(1): 97-103.
DOI:10.1107/S205252061701811X

摘要

Potassium dimanganese trivanadate, KMn2V3O10, was synthesized hydro-thermally and its crystal structure was determined from single-crystal X-ray diffraction data. The novel phase crystallizes with triclinic symmetry in space group P (1) over bar with unit-cell parameters of alpha = 6.912 (5) angstrom, beta = 6.993 (5) angstrom, c = 9.656 (5) angstrom, alpha = 101.858 (5), beta = 102.627 (5), gamma = 100.669 (5)degrees, Z = 2 and V = 432.6 (5) angstrom(3). Its structure is built from tetramers of MnO6 octahedra sharing edges and trimers of VO4 tetrahedra sharing vertices. These main structural fragments are linked in a three-dimensional framework with channels occupied by potassium ions. The transformation of this structure to that of interconnected NaCa3Mn-(V3O10)(V2O7) is discussed. The title compound orders antiferromagnetically at T-N = 8.2 K due to the magnetic exchange interactions between tetramers of Mn octahedra through VO4 tetrahedra. First-principles calculations show the magnetic couplings via Mn-O-Mn and Mn-O-V-O-Mn pathways.

  • 出版日期2018-2