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Investigation of orthorhombic–tetragonal structural crossover in (Ba 0.92 Ca 0.08 )(Zr 0.05 Ti 0.95 )O 3
Author(s) -
Singh G.,
Upadhaya A.,
Sinha A. K.,
Tiwari V. S.
Publication year - 2014
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576714017804
Subject(s) - tetragonal crystal system , orthorhombic crystal system , monoclinic crystal system , crystallography , materials science , phase (matter) , crystal structure , chemistry , organic chemistry
The orthorhombic to tetragonal phase transition in (Ba 0.92 Ca 0.08 )(Zr 0.05 Ti 0.95 )O 3 was investigated using high‐temperature X‐ray diffraction between 260 and 333 K. The results established the presence of tetragonal ( P 4 mm ) and orthorhombic ( Amm 2) phase co‐existence in the temperature range of 293 ≤ T ≤ 313 K. The tetragonal phase was found to increase from 27% at 293 K to 76% at 313 K. The structural refinement and line‐profile analysis ruled out the presence of an intermediate monoclinic structure during P 4 mm → Amm 2 crossover. The analysis shows a pure orthorhombic ( Amm 2) structure for T < 293 K and tetragonal for T > 313 K.
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