Experimental and Computational Thermochemical Study and Solid-Phase Structure of 5,5-Dimethylbarbituric Acid

2010 ◽  
Vol 114 (10) ◽  
pp. 3583-3590 ◽  
Author(s):  
María Victoria Roux ◽  
Rafael Notario ◽  
Concepción Foces-Foces ◽  
Manuel Temprado ◽  
Francisco Ros ◽  
...  
Keyword(s):  
Phase Structure ◽  
Solid Phase ◽  
Thermochemical Study

Solid phase structure in lubricating grease

1951 ◽  
Vol 11 ◽  
pp. 43 ◽  
Author(s):  
E. W. J. Mardles ◽  
I. E. Puddington
Keyword(s):  
Phase Structure ◽  
Solid Phase ◽  
Lubricating Grease

Organic Ionic Crystals: Solid‐Phase Structure and Thermal Properties of Dicationic α , ω ‐Bis[ N,N′ ‐(4‐alkylpyridinium)]alkane Hexafluorophosphate Salts

2019 ◽  
Vol 8 (9) ◽  
pp. 1718-1725
Author(s):  
Hyunho Chae ◽  
A. Reum Lee ◽  
Minyoung Yoon ◽  
U Hyeok Choi ◽  
Gyungse Park ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Phase Structure ◽  
Solid Phase ◽  
Ionic Crystals

The Synthesis and the Thermal Properties of CaZr4(PO4)6 Materials

2013 ◽  
Vol 341-342 ◽  
pp. 69-73
Author(s):  
Long Su ◽  
Wan Mei Sui ◽  
Yu Jie Liu
Keyword(s):  
Thermal Expansion ◽  
Relative Density ◽  
Phase Structure ◽  
Solid Phase ◽  
Raw Materials ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Thermal Expansion Property ◽  
Thermal Expansion Coefficients ◽  
Low Thermal Expansion

CaZr4(PO4)6 ceramics were prepared with solid reaction of two-steps method. CaZr4(PO4)6 powders were synthesized by solid-phase reaction with Ca (OH)2, ZrO2 and (NH4)2HPO4 as raw materials. Then the powders precursor were sintered to CaZr4(PO4)6 ceramics with single phase structure at 1400°C for 8 hours. The relative density was measured, the phase structure of the materials synthesized at different temperatures and the average coefficients of thermal expansion were investigated. The results showed that the relative density of CaZr4(PO4)6 ceramics sintered at 1400°C was 93%. The average thermal expansion coefficients was 1.8×10-6/°C from 25°C to 1400°C. The CaZr4(PO4)6 ceramics obtained possesses low thermal expansion property in a broad range of temperatures.

Relativistic contribution: an electronic explanation to the thermal disproportionation of PtF5

2017 ◽  
Author(s):  
Robson de Farias
Keyword(s):  
Experimental Data ◽  
Gaseous Phase ◽  
Thermal Instability ◽  
Solid Phase ◽  
Electronic Configuration ◽  
Thermochemical Study ◽  
Energy Diagram ◽  
Unpaired Electrons

<div> <p>In the present work, is performed a computational thermochemical study of platinum tetrafluoride (PtF<sub>4</sub>) and platinum pentafluoride (PtF<sub>5</sub>). The results are compared to those previously [1] obtained to PtF<sub>6</sub> as well as experimental data. Is concluded that in gaseous phase PtF<sub>4</sub> and PtF<sub>5</sub> retain their structures and number of unpaired electrons exhibited in the solid phase. Furthermore, is proposed that the generally accepted t<sub>2g</sub><sup>5</sup>e<sub>g</sub><sup>0 </sup>configuration to Pt<sup>5+</sup> is not correct. Based on the calculated results, an energy diagram is proposed to PtF<sub>5</sub>, which explain why, upon heating, platinum pentafluoride disproportionates readily [7]: 2PtF<sub>5</sub> → PtF<sub>4</sub> + PtF<sub>6</sub>, providing a clear, elegant and straightforward explanation to the thermal instability of PtF<sub>5</sub> as consequence of the electronic configuration. </p> </div>

scholarly journals On the Structure of 2,2'-Bipyrimidine. Gas and Solid Phase Structure and Barrier to Internal Rotation.

1981 ◽  
Vol 35a ◽  
pp. 707-715 ◽  
Author(s):  
Liv Fernholt ◽  
Christian Rømming ◽  
Svein Samdal ◽  
Elina Näsäkkälä ◽  
Olof Wahlberg
Keyword(s):  
Internal Rotation ◽  
Phase Structure ◽  
Solid Phase

Relativistic contribution: an electronic explanation to the thermal disproportionation of PtF5

2017 ◽  
Author(s):  
Robson de Farias
Keyword(s):  
Experimental Data ◽  
Gaseous Phase ◽  
Thermal Instability ◽  
Solid Phase ◽  
Electronic Configuration ◽  
Thermochemical Study ◽  
Energy Diagram ◽  
Unpaired Electrons

<div> <p>In the present work, is performed a computational thermochemical study of platinum tetrafluoride (PtF<sub>4</sub>) and platinum pentafluoride (PtF<sub>5</sub>). The results are compared to those previously [1] obtained to PtF<sub>6</sub> as well as experimental data. Is concluded that in gaseous phase PtF<sub>4</sub> and PtF<sub>5</sub> retain their structures and number of unpaired electrons exhibited in the solid phase. Furthermore, is proposed that the generally accepted t<sub>2g</sub><sup>5</sup>e<sub>g</sub><sup>0 </sup>configuration to Pt<sup>5+</sup> is not correct. Based on the calculated results, an energy diagram is proposed to PtF<sub>5</sub>, which explain why, upon heating, platinum pentafluoride disproportionates readily [7]: 2PtF<sub>5</sub> → PtF<sub>4</sub> + PtF<sub>6</sub>, providing a clear, elegant and straightforward explanation to the thermal instability of PtF<sub>5</sub> as consequence of the electronic configuration. </p> </div>

Solution Phase Behavior and Solid Phase Structure of Long-Chain Sodium Soap Mixtures

Langmuir ◽  
2000 ◽  
Vol 16 (22) ◽  
pp. 8276-8284 ◽  
Author(s):  
Marc N. G. de Mul ◽  
H. Ted Davis ◽  
D. Fennell Evans ◽  
Aparna V. Bhave ◽  
James R. Wagner
Keyword(s):  
Phase Behavior ◽  
Phase Structure ◽  
Solid Phase ◽  
Solution Phase ◽  
Sodium Soap ◽  
Long Chain
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