scholarly journals Defects in Crystals

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 915
Author(s):  
Julita Smalc-Koziorowska
Keyword(s):  
Defects In Crystals

Defects affect various properties of all kinds of crystals regardless of their sizes and applications [...]

Defects in Crystals

1968 ◽  
Vol 26 ◽  
pp. 244-245
Author(s):  
Kenneth R. Lawless
Keyword(s):  
Electron Microscope ◽  
Point Defects ◽  
Surface Defects ◽  
Chemical Properties ◽  
Material Point ◽  
Crystal Defects ◽  
Defects In Crystals ◽  
Irradiation Effects ◽  
Normal Lattice ◽  
Line Defects

One of the most important applications of the electron microscope in recent years has been to the observation of defects in crystals. Replica techniques have been widely utilized for many years for the observation of surface defects, but more recently the most striking use of the electron microscope has been for the direct observation of internal defects in crystals, utilizing the transmission of electrons through thin samples.Defects in crystals may be classified basically as point defects, line defects, and planar defects, all of which play an important role in determining the physical or chemical properties of a material. Point defects are of two types, either vacancies where individual atoms are missing from lattice sites, or interstitials where an atom is situated in between normal lattice sites. The so-called point defects most commonly observed are actually aggregates of either vacancies or interstitials. Details of crystal defects of this type are considered in the special session on “Irradiation Effects in Materials” and will not be considered in detail in this session.

Extended defects in crystals: examples in powder processing for ancient cosmetics

2007 ◽  
Vol 89 (4) ◽  
pp. 865-869 ◽  
Author(s):  
J. Castaing ◽  
P. Walter ◽  
P. Veyssière
Keyword(s):  
Powder Processing ◽  
Defects In Crystals ◽  
Extended Defects

Vibronic side bands of Sm2+ in alkali halides

1969 ◽  
Vol 47 (17) ◽  
pp. 1757-1767 ◽  
Author(s):  
M. Buchanan ◽  
E. J. Woll Jr.
Keyword(s):  
Low Frequency ◽  
Alkali Halides ◽  
Frequency Region ◽  
Defects In Crystals ◽  
Side Band

The calculation of vibronic side bands of defects in crystals is discussed. A model for the deformation of the lattice about a Sm2+ defect in alkali halides and side-band calculations on this model for KBr and KCl containing Sm2+ are compared with experimentally observed side bands. Improvements, particularly in the low frequency region, are found over the calculations assuming no deformation.

scholarly journals Topological defects in crystals: A density-wave theory

1988 ◽  
Vol 10 (1-2) ◽  
pp. 45-51 ◽  
Author(s):  
M Raj Lakshmi ◽  
H R Krishna-Murthy ◽  
T V Ramakrishnan
Keyword(s):  
Density Wave ◽  
Topological Defects ◽  
Wave Theory ◽  
Defects In Crystals ◽  
Density Wave Theory
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