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A novel representative in the rare family of trivanadates, KMn 2 V 3 O 10 : synthesis, crystal structure and magnetic properties
Author(s) -
Yakubovich Olga,
Shvanskaya Larisa,
Pchelkina Zlata,
Dimitrova Olga,
Volkov Anatoliy,
Volkova Olga,
Vasiliev Alexander
Publication year - 2018
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s205252061701811x
Subject(s) - crystallography , triclinic crystal system , octahedron , crystal structure , tetrahedron , chemistry , magnetic susceptibility , group (periodic table) , materials science , organic chemistry
Potassium dimanganese trivanadate, KMn 2 V 3 O 10 , was synthesized hydrothermally and its crystal structure was determined from single‐crystal X‐ray diffraction data. The novel phase crystallizes with triclinic symmetry in space group with unit‐cell parameters of a = 6.912 (5), b = 6.993 (5), c = 9.656 (5) Å, α = 101.858 (5), β = 102.627 (5), γ = 100.669 (5)°, Z = 2 and V = 432.6 (5) Å 3 . Its structure is built from tetramers of MnO 6 octahedra sharing edges and trimers of VO 4 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 NaCa 3 Mn(V 3 O 10 )(V 2 O 7 ) 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 VO 4 tetrahedra. First‐principles calculations show the magnetic couplings via Mn—O—Mn and Mn—O—V—O—Mn pathways.