4.7 Article

A5RE4X[TO4]4 crystal growth and photoluminescence. Fluoride flux synthesis of sodium and potassium rare earth silicate oxyfluorides

Journal

CRYSTENGCOMM
Volume 17, Issue 25, Pages 4654-4661

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ce00671f

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Funding

  1. National Science Foundation [DMR-1301757]
  2. University of South Carolina
  3. Welch Foundation [E-1457]
  4. Direct For Mathematical & Physical Scien
  5. Division Of Materials Research [1301757] Funding Source: National Science Foundation

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Crystals of Na5RE4F[SiO4](4) (RE = Pr, Nd, Sm-Tm) and K5Pr4F[SiO4](4) were grown using a fluoride flux synthetic technique. All compositions crystallize in the tetragonal space group I (4) over bar with lattice parameter ranges of a = 11.5094(2)-12.3745(2) angstrom and c = 5.37000(10)-5.5011(2) angstrom. Antiferromagnetic ordering is observed for Na5RE4F[SiO4](4) (RE = Tb, Dy), second harmonic generation for Na5RE4F[SiO4](4) (RE = Pr, SmHo), and intense optical properties and fluorescence quantum yield for Na5RE4F[SiO4](4) (RE = Eu, Gd, Tb). The crystal structures and physical property measurements are discussed.

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