Experimental Observation of New Phase, Determination of Loading-Path of Amorphous State and Loading–Path Dependent Phase Transitions for Pyridine around Freezing Pressure via Raman Modes in Low Wavenumber

2021 ◽  
Author(s):  
Hao Su ◽  
Xiangdong Li ◽  
Cheng Zhong ◽  
Di Mai ◽  
Wentao Liang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Experimental Observation ◽  
Amorphous State ◽  
Loading Path ◽  
Phase Determination ◽  
Raman Modes ◽  
Path Dependent ◽  
New Phase

Direct phase determination in electron crystallography: small organic molecules

1992 ◽  
Vol 50 (2) ◽  
pp. 1166-1167
Author(s):  
Douglas L. Dorset
Keyword(s):  
Organic Molecules ◽  
Data Sets ◽  
Temperature Structure ◽  
3D Analysis ◽  
Intensity Data ◽  
Electron Crystallography ◽  
Phase Determination ◽  
Measured Intensity ◽  
3D Data

The quantitative use of electron diffraction intensity data for the determination of crystal structures represents the pioneering achievement in the electron crystallography of organic molecules, an effort largely begun by B. K. Vainshtein and his co-workers. However, despite numerous representative structure analyses yielding results consistent with X-ray determination, this entire effort was viewed with considerable mistrust by many crystallographers. This was no doubt due to the rather high crystallographic R-factors reported for some structures and, more importantly, the failure to convince many skeptics that the measured intensity data were adequate for ab initio structure determinations.We have recently demonstrated the utility of these data sets for structure analyses by direct phase determination based on the probabilistic estimate of three- and four-phase structure invariant sums. Examples include the structure of diketopiperazine using Vainshtein's 3D data, a similar 3D analysis of the room temperature structure of thiourea, and a zonal determination of the urea structure, the latter also based on data collected by the Moscow group.

Chemical sensing failed by aggregation-caused quenching? A case study enables liquid/solid two-phase determination of N2H4

2021 ◽  
Vol 415 ◽  
pp. 128975
Author(s):  
Xiangqian Li ◽  
Mengqing Li ◽  
Yuze Chen ◽  
Gongxi Qiao ◽  
Qian Liu ◽  
...  
Keyword(s):  
Chemical Sensing ◽  
Phase Determination ◽  
Two Phase

scholarly journals Single-phase determination of calcium and magnesium in biodiesel using smartphone-based digital images

Fuel ◽  
2022 ◽  
Vol 307 ◽  
pp. 121837
Author(s):  
Samara Soares ◽  
Gabriel M. Fernandes ◽  
Liz M.B. Moraes ◽  
Alex D. Batista ◽  
Fábio R.P. Rocha
Keyword(s):  
Single Phase ◽  
Digital Images ◽  
Phase Determination ◽  
Calcium And Magnesium

1,2-propanediol and 1,3-propanediol homogeneous nucleation rates and phase transitions in the new phase critical embryos

2000 ◽  
Vol 112 (22) ◽  
pp. 9917-9928 ◽  
Author(s):  
M. P. Anisimov ◽  
J. A. Koropchak ◽  
A. G. Nasibulin ◽  
L. V. Timoshina
Keyword(s):  
Phase Transitions ◽  
Homogeneous Nucleation ◽  
New Phase

Phase determination of second-order coherence function

1977 ◽  
Vol 23 (1) ◽  
pp. 51-53
Author(s):  
S. Chopra ◽  
J.P. Dudeja
Keyword(s):  
Coherence Function ◽  
Second Order ◽  
Phase Determination

Dielectric and Thermal Studies on New Phase Transitions of CsHSO4

1981 ◽  
Vol 50 (10) ◽  
pp. 3187-3188 ◽  
Author(s):  
Masaru Komukae ◽  
Toshio Osaka ◽  
Yasuharu Makita ◽  
Tohru Ozaki ◽  
Kazuyuki Itoh ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Thermal Studies ◽  
New Phase

Pseudopotential Calculations of Structural Properties of Solids

1985 ◽  
Vol 63 ◽  
Author(s):  
Marvin L. Cohen
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Vibrational Properties ◽  
Structural Phase Transitions ◽  
Superconducting Properties ◽  
Lattice Constants ◽  
Pseudopotential Calculations ◽  
Pseudopotential Approach ◽  
Cohesive Energies

ABSTRACTThrough the development of a total energy pseudopotential approach, it has become possible to compute structural, electronic, and vibrational properties of solids using only the atomic numbers and atomic masses of the constituent atoms as input. The method has been applied to semiconductors, insulators, and metals; and agreement with experiment for most properties is usually within a few percent.Applications include the determination of lattice constants for specific structural phases, properties of structural phase transitions, cohesive energies, bulk moduli, lattice vibrational spectra, electron-lattice interaction parameters, and electronic and superconducting properties. A recent example is the prediction of superconductivity in highly condensed hexagonal silicon which was subsequently found experimentally.

NMR study of hydrogen diffusion and phase determination of the Mg2NiHx system

1980 ◽  
Vol 73 (10) ◽  
pp. 4758-4764 ◽  
Author(s):  
S. D. Goren ◽  
C. Korn ◽  
M. H. Mintz ◽  
Z. Gavra ◽  
Z. Hadari
Keyword(s):  
Hydrogen Diffusion ◽  
Phase Determination ◽  
Nmr Study
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