Published March 1, 2006 | Version v1
Journal article Metadata-only

Crystal structural phase transition in CaCrO4 under high pressure

Creators

  • 1. Beijing National Lab for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)
  • 2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 (China)

Description

Pressure-related structural properties of CaCrO4 with zircon-type structure (I41/amd) at ambient pressure were investigated using synchrotron radiation x-ray diffraction in energy-dispersive mode in a diamond anvil cell (DAC) up to 29.1 GPa at room temperature. A sluggish first-order structural phase transition to a scheelite-type phase (I41/a) was observed at 5.7 GPa. The lattice parameters of both phases at different pressures were calculated. The isothermal Birch-Murnaghan equation of state (EOS) was used to fit the data of pressure versus unit cell volume, and the bulk moduli were simulated to be 103.7 ± 0.3 and 125.1 ± 6.2 GPa for the zircon and scheelite phase, respectively

Availability note (English)

Available online at http://stacks.iop.org/0953-8984/18/2421/cm6_8_008.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-8984/18/2421/cm6_8_008.pdf;
DOI
10.1088/0953-8984/18/8/008;
PII
S0953-8984(06)07371-1;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
18
Journal Issue
8
Journal Page Range
p. 2421-2428
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37061335
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
CALCIUM COMPOUNDS; CHROMIUM OXIDES; CRYSTALS; DIAMONDS; EQUATIONS OF STATE; LATTICE PARAMETERS; PHASE TRANSFORMATIONS; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; SYNCHROTRON RADIATION; TETRAGONAL LATTICES; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BREMSSTRAHLUNG; CARBON; CHALCOGENIDES; CHROMIUM COMPOUNDS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; EQUATIONS; MINERALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PRESSURE RANGE; RADIATIONS; SCATTERING; TRANSITION ELEMENT COMPOUNDS