• Title of article

    Syntheses, crystal structures, and comparisons of rare-earth oxyapatites Ca2RE8(SiO4)6O2 (RE = La, Nd, Sm, Eu, or Yb) and NaLa9(SiO4)6O2

  • Author/Authors

    Crum, Jarrod V. Pacific Northwest National Laboratory, USA , Chong, Saehwa Pacific Northwest National Laboratory, USA , Peterson, Jacob A. Pacific Northwest National Laboratory, USA , Riley, Brian J. Pacific Northwest National Laboratory, USA

  • Pages
    55
  • From page
    1
  • To page
    55
  • Abstract
    Six different rare-earth oxyapatites, including Ca2RE8(SiO4)6O2 (RE = La, Nd, Sm, Eu, or Yb) and NaLa9(SiO4)6O2, were synthesized using solution-based processes followed by cold pressing and sinter­ing. The crystal structures of the synthesized oxyapatites were determined from powder X-ray diffraction (P-XRD) and their chemistries verified with electron probe microanalysis (EPMA). All the oxyapatites were isostructural within the hexa­gonal space group P63/m and showed similar unit-cell parameters. The isolated [SiO4]4− tetra­hedra in each crystal are linked by the cations at the 4f and 6h sites occupied by RE3+ and Ca2+ in Ca2RE8(SiO4)6O2 or La3+ and Na+ in NaLa9(SiO4)6O2. The lattice parameters, cell volumes, and densities of the synthesized oxyapatites fit well to the trendlines calculated from literature values.
  • Keywords
    oxyapatite , lanthanide oxyapatite , rare-earth oxyapatite , powder diffraction
  • Journal title
    Acta Crystallographica Section E: Crystallographic Communications
  • Serial Year
    2019
  • Full Text URL
    journals.iucr.org/e/issues/2019/07/00/vn2147/vn2147.pdf
  • Record number

    2628136

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=2628136