Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..19s&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 24, pp. 19-1, CiteID 2166, DOI 10.1029/2002GL016148
Physics
19
Mineralogy, Petrology, And Mineral Physics: Crystal Chemistry, Mineral Physics: High-Pressure Behavior, Mineral Physics: X Ray, Neutron, And Electron Spectroscopy And Diffraction, Tectonophysics: Earth'S Interior-Composition And State (1212)
Scientific paper
High-resolution synchrotron X-ray diffraction measurements were performed at 20-46 GPa on CaSiO3 perovskite (Ca-pv) synthesized in a laser heated diamond cell. After heating, we observed peak splittings for the cubic 200 and 211 diffraction lines, attributable to a tetragonal distortion of Ca-pv. The bulk modulus of the tetragonal phase is 255 +/- 5 GPa for K0T' = 4. The observed intensities and d-spacings of the split lines indicate that the c-axis is shorter than the a-axes (c/a = 0.993 - 0.996). This is compatible with either SiO6 octahedron rotation around the a-axes or SiO6 octahedron distortion (shorter Si-O bonds along the c-axis than the a-axes), provided that the observed phase has a tetragonal unit cell. These structural distortions in Ca-pv can affect its physical properties and capacity for large cations.
Duffy Thomas S.
Jeanloz Raymond
Shim Sang-Heon
No associations
LandOfFree
Tetragonal structure of CaSiO3 perovskite above 20 GPa does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Tetragonal structure of CaSiO3 perovskite above 20 GPa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tetragonal structure of CaSiO3 perovskite above 20 GPa will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-964969