semivacancy

English

Etymology

semi- +‎ vacancy

Noun

semivacancy (plural semivacancies)

1. (physics) A vacancy defect in which two adjacent lattice sites are unoccupied and an atom occupies the interstitial site between the two vacant sites.

   Coordinate terms: monovacancy, divacancy, trivacancy

   • 2008, Edmund G. Seebauer, Meredith C. Kratzer, Charged Semiconductor Defects: Structure, Thermodynamics and Diffusion, page 219:

     The semivacancies are separated by a variable number of Ge adatoms in metastable T₄ positions and can diffuse or eventually merge back into a single vacancy.

   • 2012, D. Shaw, Atomic Diffusion in Semiconductors, page 234:

     In the undistorted configurations both a divacancy and a semivacancy pair belong to the symmetry point group D3d .