High-Pressure Structural Phase Transformation of Ferroelectric Bis-benzylammonium Lead Tetrachloride Studied by Raman Spectroscopy and X-ray Diffraction

Detailed structural properties of La1−xBaxCoO3 (LBCO) have been investigated by means of X-ray powder diffraction and Rietveld analysis. A structural phase transformation from R3c to Pm3m at x=0.30–0.35 has been detected based on a comparison between the refinements of R3c and Pm3m. The Co–O bond length of the CoO6 octahedron expanded rapidly with increasing Ba content when x<0.1, and then it leveled off and kept constant at 0.1⩽x⩾0.35, where the Co–O–Co bond angle reaches 180°. The Co–O bond length expansion resumed with increasing Ba content beyond x=0.35.

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Study of Phase Transformation in BaTe2O6 by in Situ High-Pressure X-ray Diffraction, Raman Spectroscopy, and First-Principles Calculations

Inorganic Chemistry ◽

10.1021/acs.inorgchem.5b02174 ◽

2015 ◽

Vol 55 (1) ◽

pp. 227-238 ◽

Cited By ~ 5

Author(s):

K. K. Mishra ◽

S. Nagabhusan Achary ◽

Sharat Chandra ◽

T. R. Ravindran ◽

K. K. Pandey ◽

...

Keyword(s):

Raman Spectroscopy ◽

High Pressure ◽

Phase Transformation ◽

First Principles ◽

First Principles Calculations ◽

X Ray Diffraction ◽

X Ray

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Powder X-ray diffraction and Rietveld analysis of La1−xCaxMnO3(0

Powder Diffraction ◽

10.1154/1.2104536 ◽

2006 ◽

Vol 21 (1) ◽

pp. 40-44 ◽

Cited By ~ 22

Author(s):

P. R. Sagdeo ◽

Shahid Anwar ◽

N. P. Lalla

Keyword(s):

Phase Transformation ◽

Calcium Concentration ◽

Single Phase ◽

Structural Phase ◽

Rietveld Analysis ◽

Linear Variation ◽

X Ray Diffraction ◽

Structural Phase Transformation ◽

Magnetic Phases ◽

X Ray

Single-phase samples of La1−xCaxMnO3compounds have been synthesized by solid-state reaction. Detailed Rietveld analysis of powder X-ray diffraction data showed that La1−xCaxMnO3undergoes a structural phase transformation fromR-3ctoPnmaatX=0.05–0.075. There is a linear variation of lattice parameters as a function of calcium concentration. The slope of this linear variation changes atX=0.6. A correlation between observed Mn-O bond lengths, corresponding to different compositions, and possible magnetic phases is discussed.

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ChemInform Abstract: Study of Phase Transformation in BaTe2O6by in situ High-Pressure X-Ray Diffraction, Raman Spectroscopy, and First-Principles Calculations.

ChemInform ◽

10.1002/chin.201613001 ◽

2016 ◽

Vol 47 (13) ◽

pp. no-no

Author(s):

K. K. Mishra ◽

S. Nagabhusan Achary ◽

Sharat Chandra ◽

T. R. Ravindran ◽

K. K. Pandey ◽

...

Keyword(s):

Raman Spectroscopy ◽

High Pressure ◽

Phase Transformation ◽

First Principles ◽

First Principles Calculations ◽

X Ray Diffraction ◽

X Ray

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Powder X-ray diffraction and Rietveld analysis of Cd1−xCuxCr2O4(0.1≤x≤0.7)

Powder Diffraction ◽

10.1154/1.2790964 ◽

2007 ◽

Vol 22 (4) ◽

pp. 340-343 ◽

Cited By ~ 4

Author(s):

L. Q. Yan ◽

Z. W. Jiang ◽

X. D. Peng ◽

L. H. He ◽

F. W. Wang

Keyword(s):

Magnetic Properties ◽

Phase Transformation ◽

Structural Phase ◽

Rietveld Analysis ◽

Unit Cell ◽

X Ray Diffraction ◽

Structural Phase Transformation ◽

X Ray ◽

Cu Content ◽

Tetragonal Cell

Structural properties of Cd1−xCuxCr2O4(CCCO) have been investigated by means of X-ray powder diffraction and Rietveld analysis. A structural phase transformation from Fd3m to I42d at x=0.64 has been detected. The lattice constant a of the cubic unit cell decreases rapidly with increasing Cu content up to x=0.62. At x=0.64, the cubic unit cell is compressed into a tetragonal cell and CrO6 octahedrons are distorted. With continuing Cu content increases above 0.64, the distortion of the unit cell is released slightly according to the changes in c/a. Magnetic properties of Cd1−xCuxCr2O4(x=0.1,0.3,0.5,0.7) have also been measured and are discussed.

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