High Pressure and Chemical Bonding in Materials Chemistry

ChemInform ◽  
2006 ◽  
Vol 37 (39) ◽  
Author(s):  
Gerard Demazeau
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
Materials Chemistry

High Pressure and Chemical Bonding in Materials Chemistry

2006 ◽  
Vol 61 (7) ◽  
pp. 799-807 ◽  
Author(s):  
Gérard Demazeau
Keyword(s):  
High Pressure ◽  
Chemical Bond ◽  
Chemical Bonding ◽  
High Pressures ◽  
Chemical Properties ◽  
General Rule ◽  
Research Area ◽  
Chemical Compositions ◽  
Materials Chemistry ◽  
Novel Materials

Materials chemistry under high pressures is an important research area opening new routes for stabilizing novel materials or original structures with different compositions (oxides, oxoborates, nitrides, nitridophosphates, sulfides,. . .).Due to the varieties of chemical compositions and structures involved, high pressure technology is also an important tool for improving the investigations on chemical bonding and consequently the induced physico-chemical properties.Two different approaches can be described: (i) the chemical bond is pre-existing and in such a case, high pressures lead to structural transformations, (ii) the chemical bond does not exist and high pressures are able to help the synthesis of novel materials. In both cases the condensation effect (ΔV < 0 between precursors and the final product) is the general rule. In addition, through the improvement of the reactivity, high pressures can lead to materials that are not reachable through other chemical routes.

scholarly journals Nature of the electronic states involved in the chemical bonding and superconductivity at high pressure in SnO

JETP Letters ◽  
2011 ◽  
Vol 94 (2) ◽  
pp. 142-146 ◽  
Author(s):  
J. A. McLeod ◽  
A. V. Lukoyanov ◽  
E. Z. Kurmaev ◽  
L. D. Finkelstein ◽  
A. Moewes
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
Electronic States

scholarly journals High-Pressure Synthesis and Chemical Bonding of Barium Trisilicide BaSi3

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 145 ◽  
Author(s):  
Julia-Maria Hübner ◽  
Lev Akselrud ◽  
Walter Schnelle ◽  
Ulrich Burkhardt ◽  
Matej Bobnar ◽  
...  
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
Ambient Pressure ◽  
Covalent Bonding ◽  
Partial Structure ◽  
Exothermal Reaction ◽  
Metallic Behavior ◽  
Bonding Analysis ◽  
Group I ◽  
Pressure Synthesis

BaSi3 is obtained at pressures between 12(2) and 15(2) GPa and temperatures from 800(80) and 1050(105) K applied for one to five hours before quenching. The new trisilicide crystallizes in the space group I 4 ¯ 2m (no. 121) and adopts a unique atomic arrangement which is a distorted variant of the CaGe3 type. At ambient pressure and 570(5) K, the compound decomposes in an exothermal reaction into (hP3)BaSi2 and two amorphous silicon-rich phases. Chemical bonding analysis reveals covalent bonding in the silicon partial structure and polar multicenter interactions between the silicon layers and the barium atoms. The temperature dependence of electrical resistivity and magnetic susceptibility measurements indicate metallic behavior.

Optical properties and chemical bonding of 3C-SiC under high-pressure

Optik ◽  
2020 ◽  
Vol 202 ◽  
pp. 163613 ◽  
Author(s):  
Nidhal Drissi ◽  
Nadir Bouarissa ◽  
Fathi Jomni
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
Chemical Bonding

Chemical Bonding, Electron−Phonon Coupling, and Structural Transformations in High-Pressure Phases of Si†

2006 ◽  
Vol 110 (8) ◽  
pp. 3721-3726 ◽  
Author(s):  
John S. Tse ◽  
Dennis D. Klug ◽  
Serguei Patchkovskii ◽  
Yanming Ma ◽  
J. K. Dewhurst
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
Structural Transformations ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Bonding Electron

Lutetium Trigermanide LuGe3: High-Pressure Synthesis, Superconductivity, and Chemical Bonding

2018 ◽  
Vol 57 (16) ◽  
pp. 10295-10302 ◽  
Author(s):  
Julia-Maria Hübner ◽  
Matej Bobnar ◽  
Lev Akselrud ◽  
Yurii Prots ◽  
Yuri Grin ◽  
...  
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

High-Pressure Evolution of Unexpected Chemical Bonding and Promising Superconducting Properties of YB6

2018 ◽  
Vol 122 (49) ◽  
pp. 27820-27828 ◽  
Author(s):  
Jianyun Wang ◽  
Xianqi Song ◽  
Xuecheng Shao ◽  
Bo Gao ◽  
Quan Li ◽  
...  
Keyword(s):  
High Pressure ◽  
Chemical Bonding ◽  
Superconducting Properties ◽  
Pressure Evolution
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