Aluminum Germanides of the Divalent Lanthanoides Eu and Yb: Synthesis, Structural Chemistry and Chemical Bonding (In German)

2011 ◽  
Vol 66 ◽  
pp. 0793 ◽  
Author(s):  
B. Bauer ◽  
C. Röhr
Keyword(s):  
Chemical Bonding ◽  
Structural Chemistry

Lithium transition metal pnictides – structural chemistry, electrochemistry, and function

2015 ◽  
Vol 35 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Florian Winter ◽  
Rainer Pöttgen ◽  
Magnus Greiwe ◽  
Tom Nilges
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Crystal Structures ◽  
Chemical Bonding ◽  
Electrochemical Behavior ◽  
Solid State Nmr ◽  
Structural Chemistry ◽  
Covalently Bonded ◽  
Interesting Class ◽  
And Function

AbstractLithium-transition metal (T)-pnictides (Pn=P, As, Sb, Bi) are an interesting class of materials with greatly differing crystal structures. The transition metal and pnictide atoms build up covalently bonded networks that leave cavities or channels for the lithium atoms. Depending on the bonding of lithium to the polyanionic network, one observes mobility of the lithium atoms. The crystal chemistry, chemical bonding, 7Li solid-state NMR, and the electrochemical behavior of the pnictides are reviewed. The structural chemistry is compared with related tetrelides.

scholarly journals Thermochemical electronegativities of the elements

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Christian Tantardini ◽  
Artem R. Oganov
Keyword(s):  
Solid State ◽  
Chemical Bonding ◽  
Structural Chemistry ◽  
Solid State Chemistry ◽  
Structure And Properties ◽  
Bond Energies ◽  
Dimensionless Numbers ◽  
Bond Polarity ◽  
Stability Structure ◽  
Definition Of

AbstractElectronegativity is a key property of the elements. Being useful in rationalizing stability, structure and properties of molecules and solids, it has shaped much of the thinking in the fields of structural chemistry and solid state chemistry and physics. There are many definitions of electronegativity, which can be roughly classified as either spectroscopic (these are defined for isolated atoms) or thermochemical (characterizing bond energies and heats of formation of compounds). The most widely used is the thermochemical Pauling’s scale, where electronegativities have units of eV−1/2. Here we identify drawbacks in the definition of Pauling’s electronegativity scale—and, correcting them, arrive at our thermochemical scale, where electronegativities are dimensionless numbers. Our scale displays intuitively correct trends for the 118 elements and leads to an improved description of chemical bonding (e.g., bond polarity) and thermochemistry.

Radiation-induced surface decomposition

1983 ◽  
Vol 41 ◽  
pp. 368-369
Author(s):  
M. L. Knotek
Keyword(s):  
Ionizing Radiation ◽  
Atomic Structure ◽  
Chemical Bonding ◽  
Neutral Species ◽  
Radiation Induced ◽  
Physical And Chemical ◽  
Surface Decomposition ◽  
The Relationship ◽  
Electron And Photon ◽  
Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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