scholarly journals Synthesis, Crystal Structure, and Physical Properties of Two Polymorphs of CsGaSe2, and High-Temperature X-ray Diffraction Study of the Phase Transition Kinetics

2016 ◽  
Vol 16 (7) ◽  
pp. 3983-3992 ◽  
Author(s):  
Daniel Friedrich ◽  
Marc Schlosser ◽  
Arno Pfitzner
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
High Temperature ◽  
Physical Properties ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Transition Kinetics

scholarly journals Crystal structure and high temperature X-ray diffraction study of thermoelectric chimney-ladder FeGe (γ ≈ 1.52)

2020 ◽  
Vol 846 ◽  
pp. 155696
Author(s):  
Sylvain Le Tonquesse ◽  
Christopher Hassam ◽  
Yuichi Michiue ◽  
Yoshitaka Matsushita ◽  
Mathieu Pasturel ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

Temperature-Jump Time-Resolved X-ray Diffraction Study of Cubic−Cubic Phase-Transition Kinetics in Thermotropic Cubic Mesogen 1,2-Bis(4′-n-alkoxybenzoyl)hydrazines (BABH-n)

Langmuir ◽  
2010 ◽  
Vol 26 (14) ◽  
pp. 11605-11608 ◽  
Author(s):  
Hiroyuki Mori ◽  
Shoichi Kutsumizu ◽  
Kazuya Saito ◽  
Katsuhiro Yamamoto ◽  
Shinichi Sakurai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Diffraction Study ◽  
Temperature Jump ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Jump Time ◽  
Phase Transition Kinetics

High-temperature single-crystal X-ray diffraction study of tetragonal and cubic perovskite-type PbTiO3phases

2016 ◽  
Vol 72 (3) ◽  
pp. 381-388 ◽  
Author(s):  
Akira Yoshiasa ◽  
Tomotaka Nakatani ◽  
Akihiko Nakatsuka ◽  
Maki Okube ◽  
Kazumasa Sugiyama ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Single Crystal ◽  
Diffraction Study ◽  
Relative Displacement ◽  
High Temperature Phase ◽  
Cubic Phase ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray

A high-temperature single-crystal X-ray diffraction study of a synthetic PbTiO3perovskite was carried out over the wide temperature range 298–928 K. A transition from a tetragonal (P4mm) to a cubic (Pm \bar 3 m) phase has been revealed near 753 K. In the non-centrosymmetricP4mmsymmetry group, the difference in relative displacement between Pb and O along thec-axis is much larger than that between Ti and O. The Pb and Ti cations contribute sufficiently to polarization being shifted in the opposite direction compared with the shift of O atoms. Deviation from the linear changes in Debye–Waller factors and bonding distances in the tetragonal phases can be interpreted as a precursor phenomenon before the phase transition. Disturbance of the temperature factorUeqfor O is observed in the vicinity of the transition point, whileUeqvalues for Pb and Ti are continuously changing with increasing temperature. The O site includes the clear configurational disorder in the cubic phase. The polar local positional distortions remain in the cubic phase and are regarded as the cause of the paraelectricity. Estimated values of the Debye temperature ΘDfor Pb and Ti are 154 and 467 K in the tetragonal phase and decrease 22% in the high-temperature phase. Effective potentials for Pb and Ti change significantly and become soft after the phase transition.

Crystal Structure of Levofloxacin Anhydrates: A High-Temperature Powder X-ray Diffraction Study Versus Crystal Structure Prediction

2018 ◽  
Vol 18 (6) ◽  
pp. 3558-3568 ◽  
Author(s):  
Jennifer T. J. Freitas ◽  
Cristiane C. de Melo ◽  
Olímpia M. M. S. Viana ◽  
Fabio F. Ferreira ◽  
Antonio C. Doriguetto
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Diffraction Study ◽  
Structure Prediction ◽  
Crystal Structure Prediction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Versus Crystal

A high-temperature X-ray diffraction study of the NiO–Li2O system

1971 ◽  
Vol 4 (4) ◽  
pp. 293-297 ◽  
Author(s):  
C. J. Toussaint
Keyword(s):  
Crystal Structure ◽  
Phase Diagram ◽  
Thermal Expansion ◽  
High Temperature ◽  
Transition Temperature ◽  
Diffraction Study ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystallographic Study

A crystallographic study of the system Ni2+ 1−2x Ni3+ x Li+ x O has been carried out. The crystal structure of the material in the range 0≤x≤0.4 at room temperature and up to 1000°C has been studied. The principal coefficients of thermal expansion and the phase diagram are given. The structural rhombohedral → face-centred cubic transition temperature of NiO has been determined.

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