Gem diamonds owe much of their value to their color, or lack thereof. Defects in the atomic structure of diamond are responsible ... carbon atom vacancies in the lattice (either single or clusters of ...

Abstract: The causes of energy dissipation and mechanical instabilities of the elastic constants in metals can usually be traced to the presence of an imperfection in the crystal lattice called a ...

This cylindrical region surrounding the dislocation line is known as the dislocation core. For the edge dislocation shown, the A atoms are more closely spaced than atoms in the undistorted lattice and ...

Diamond belongs to the cubic crystal system and should therefore exhibit isotropic optical properties. However, it has long been documented that diamonds often show weak birefringence. This study has ...