Crystal structure of Ce-doped (La,Gd)2Si2O7 grown by the Czochralski process

Rikito Murakami, Shunsuke Kurosawa, Hisanori Yamane, Takahiko Horiai, Yasuhiro Shoji, Yuui Yokota, Akihiro Yamaji, Yuji Ohashi, Kei Kamada, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Single crystals of (La0.25Gd0.75)2Si2O7 and (La0.235Ce0.015Gd0.75)2Si2O7 were grown by the Czochralski method. Structure analysis of the single crystals by X-ray diffraction (XRD) revealed that (La0.25Gd0.75)2Si2O7 and (La0.235Ce0.015Gd0.75)2Si2O7 crystalize in monoclinic cells (space group P21/c), a = 5.3905(8) Å, b = 8.5605(11) Å, c = 13.957(2) Å, β = 112.223(6)º, and a = 5.3921(7) Å, b = 8.5688(10) Å, c = 13.9172(14) Å, β = 111.980(5)º, respectively. One of the two different rare-earth sites is preferentially occupied by La and Gd atoms or by La, Ce and Gd atoms, and the other is occupied by Gd atoms only. Peaks attributed to the 4f-4f transitions (8S7/26G7/2 and 8S7/26Ix) of Gd3+ and 4f-5d transitions of Ce3+ were observed in the absorption spectra of (La0.25Gd0.75)2Si2O7 and (La0.235Ce0.015Gd0.75)2Si2O7 single crystals.

Original languageEnglish
Pages (from-to)404-410
Number of pages7
JournalJournal of Alloys and Compounds
Volume748
DOIs
Publication statusPublished - 2018 Jun 5

Keywords

  • Oxide scintillator
  • Preferential site ordering
  • Pyrosilicate
  • Single crystal growth
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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