ReadyFoot

Monday, October 18, 2004

Vacancy

In crystallography, absence of an atom or molecule from a point that it would normally occupy in a crystal. Such an imperfection (crystal defect) in the regular spacing of atoms changes the electrical and optical properties of the crystal. The theory of colour centres holds that vacancies give colour to many solids. Vacancies can be created by mechanical deformation

0 Comments:

Post a Comment

<< Home