Selected x-ray diffraction patterns of CaSnO3 perovskite phase collected under high pressure. The diffraction peaks marked with colored circles and Miller indices belong to the pressure marker, NaCl.
X-ray powder diffraction pattern of CaSnO3 and NaCl at 15.5 GPa, together with calculated (green line) and observed (black crosses) profiles. The difference curve (Iobs.–Icalc., pink line) is shown at the bottom. The short ticks indicate modeled reflection position; NaCl in black and CaSnO3 in red.
Measured V/V0 of CaSnO3 as a function of pressure. The symbols in black and red represent the measurements from this study and those in blue from the study of Kung et al. (2001). Symbol sizes exceed the estimated experimental uncertainties. The broken grey line is a second-order polynomial fit to the data points collected in this study that has no physical meaning. The broken blue line is the third-order Birch-Murnaghan equation of state (EoS) obtained by fitting to the P-V data.
Raman pattern at ambient conditions.
Raman patterns at high pressure.
Linear variation of the Raman shifts with pressure. Empty and solid symbols represent the measurements from different runs. The dash lines are the best linear fits of the data.
Raman frequencies and mode assignments for the Ca-bearing perovskites in different studies.
Pressure dependences of frequency shifts of Raman modes for CaSnO3 and CaTiO3.
Article metrics loading...
Full text loading...