lattice vacancy; vacancy defect
Technical term in crystallography for a point defect where an atom is missing from a crystal lattice site.
A lattice vacancy in a crystal is a defect where an atom is missing from its proper site.
格子欠陥 is a broader term for any crystal lattice defect, while 空格子点 specifically refers to a vacancy defect.
Compound of 空 (empty), 格子 (lattice), and 点 (point), directly describing a vacant lattice point.