The solid-solution region for the langasite-type Ca3TaGa3Si2O14 crystal as determined by a lever rule

Hengyu Zhao, Satoshi Uda, Kensaku Maeda, Jun Nozawa, Haruhiko Koizumi, Kozo Fujiwara

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2 Citations (Scopus)

Abstract

A lever rule was applied to data concerning the compositions and proportions of secondary phases coexisting with a Ca3TaGa3Si2O14 (CTGS) matrix to determine the boundary compositions of the solid-solution region for CTGS at 1320 °C, as a means of ascertaining the solid-solution for the langasite-type phase in the quaternary CaO-Ta2O5-Ga2O3-SiO2 system. The compositions and proportions of secondary phases were assessed by electron probe micro-analysis as well as through back-scattered electron images. The experimental results showed that the narrow solid-solution region for CTGS is located in a Ta-poor, Ga-poor and Si-rich region relative to its stoichiometric composition.

Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalJournal of Crystal Growth
Volume415
DOIs
Publication statusPublished - 2015 Apr 1

Keywords

  • A1. Lever rule
  • A1. Phase diagrams
  • A1. Solid solution
  • B1. Oxides

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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