The A2+Mn5(SO4)6 family of triangular lattice, ferrimagnetic sulfates

D. V. West, T. M. McQueen, I. D. Posen, X. Ke, Q. Huang, H. W. Zandbergen, A. J. Williams, P. Schiffer, R. J. Cava

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5 Scopus citations


A new family of anhydrous sulfates, A2+Mn5(SO4)6 (A=Pb, Ba, Sr) is reported. The crystal structures of PbMn5(SO4)6 and SrMn5(SO4)6 are solved by powder X-ray and neutron diffraction. BaMn5(SO4)6 is isostructural. PbMn5(SO4)6 crystallizes with P over(3, -) symmetry and unit cell parameters of a=14.551(1) Å and c=7.535(1) Å. The structure has rich features, including dimers of face-sharing MnO6 octahedra, and two complementary triangular layers of Mn atoms. All compounds undergo a magnetic ordering transition at 10 K, below which, the magnetic susceptibility of the compounds varies systematically with the radius of the non-magnetic cation. Low temperature neutron diffraction shows that the complementary triangular layers result in a ferrimagnet with a net moment corresponding to one high spin Mn2+ per unit cell, correlating well with the magnetization data. The non-magnetic variant PbMg5(SO4)6 is also reported.

Original languageEnglish (US)
Pages (from-to)1343-1350
Number of pages8
JournalJournal of Solid State Chemistry
Issue number6
StatePublished - Jun 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


  • Crystallography
  • Geometric frustration
  • Magnetism
  • New crystal structure
  • Regular polygon tiling
  • Sulfate
  • Triangular lattice


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