Structural and magnetic properties of churchite-type REPO4·2H2O materials

Mohamed Ruwaid Rafiuddin, Shu Guo, Giovanni Donato, Andrew P. Grosvenor, Nicolas Dacheux, Robert J. Cava, Adel Mesbah

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The structural and magnetic properties of churchite-type REPO4·2H2O (RE ​= ​Gd to Lu) materials (low-temperature polymorph of the rare-earth phosphate family) are reported. The materials were synthesized at low temperatures (4 ​°C) using a precipitation method and the long-range and local structures were determined using powder XRD and XANES. The churchite materials crystallize in the monoclinic system (Space group – C2/c) and adopt a 2D layered structure with water occupying the interlayer regions. The churchite materials were found to transform to the xenotime structure at 300 ​°C. DC magnetization experiments reveal the absence of long-range magnetic ordering between 300 and 1.8 ​K. The effective magnetic moments (μeff) are similar to those of the free RE (RE ​= ​Gd, Tb, Dy, Ho, Er) ions.

Original languageEnglish (US)
Article number123261
JournalJournal of Solid State Chemistry
StatePublished - Aug 2022

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


  • Churchite
  • Local structure
  • Magnetism
  • Paramagnetic nature


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