A New High Pressure Calcium Silicate with Five-Coordinated Silicon, α-CaSi2O5Synthesized at 1500°C and 10 GPa

Y. Kudoh, M. Kanzaki

Research output: Contribution to journalArticlepeer-review


Crystal structure of α-CaSi2O5 synthesized at conditions of 1500°C and 10 GPa, has been solved and refined in œntrosymmetric space group PL The structure is closely related to that of titanite, CaTiSiO5 and consists the square pyramid five-fold coordination of silicon by oxygen. The ionic radius for five-coordinated Si calculated from the bond distances is 0.33 Å.

Original languageEnglish
Pages (from-to)131-133
Number of pages3
JournalReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Publication statusPublished - 1998


  • CaSiO
  • Crystal structure
  • Five-coordinated silicon
  • Square pyramid

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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