The 12-layer trimer-based hexagonal perovskite Cs4Ca0.7Mn3.3Cl12

Teresa Lee, Xianghan Xu, Weiwei Xie, Robert J. Cava

Research output: Contribution to journalArticlepeer-review


We describe the crystal structure and basic magnetic properties of Cs4Ca0.7Mn3.3Cl12, a previously unreported twelve layer (12L-) hexagonal (R-3m) chloride perovskite. Its crystal structure features face sharing MnCl6 octahedra that form Mn3Cl12 trimers. The trimers, which form a triangular array, are separated by corner sharing to layers of disordered single Ca(Mn)Cl6 octahedra. The decreased intratrimer Mn–Mn distance yields stronger magnetic coupling within trimers than between trimers. The dominant magnetic interactions are antiferromagnetic (θCW = −105 K), the effective magnetic moment per Mn2+ is 6.5 μB, and potential signatures of magnetic frustration are observed. Behavior consistent with short- and long-range magnetic order is exhibited at approximately 37 and 0.7 K, respectively.

Original languageEnglish (US)
Article number124095
JournalJournal of Solid State Chemistry
StatePublished - Aug 2023

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


  • 12L-hexagonal perovskite
  • Halide perovskite
  • Magnetic trimers
  • Magnetism


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