Pressure-induced phase transitions in alpha-ZrMo2O8

Summary, in English

We report high-pressure Raman, infrared (IR), and optical-absorption spectra of alpha-ZrMo2O8 (trigonal) up to 38 GPa at room temperature. The spectroscopic studies are consistent with diffraction results that show that alpha-ZrMo2O8 transforms into delta-ZrMo2O8 (monoclinic) at about 1 GPa and the delta phase converts to the epsilon phase (trielinic) at about 2.0 GPa. Optical-absorption measurements give an estimate of the band gap of about 0.6 eV at the lowest pressure. Band-gap changes with pressure are confirmed with visual observations. ZrMo2O8 changes from transparent at 5 GPa to yellow at 10 GPa, red at 18 GPa, and at about 30 GPa it becomes opaque.

• Författare: DVS Muthu; B Chen; JM Wrobel; AMK Andersen; Stefan Carlson; MB Kruger
• Avdelning/ar: MAX IV-laboratoriet
• Publiceringsår: 2002
• Språk: Engelska
• Publikation/Tidskrift/Serie: Physical Review B (Condensed Matter and Materials Physics)
• Volym: 65
• Issue: 6
• Länkar: http://dx.doi.org/10.1103/PhysRevB.65.064101
• Dokumenttyp: Artikel i tidskrift
• Förlag: American Physical Society
• Ämne: Inorganic Chemistry
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1098-0121