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

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

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
Volume182
Issue number6
DOIs
StatePublished - Jun 1 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

Keywords

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

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    West, D. V., McQueen, T. M., Posen, I. D., Ke, X., Huang, Q., Zandbergen, H. W., Williams, A. J., Schiffer, P., & Cava, R. J. (2009). The A2+Mn5(SO4)6 family of triangular lattice, ferrimagnetic sulfates. Journal of Solid State Chemistry, 182(6), 1343-1350. https://doi.org/10.1016/j.jssc.2009.03.001