noun
interstice; space between lattice points
Technical term in physics referring to the space or gap between points in a crystal lattice or similar grid.
結晶の格子点間には不純物が入り込むことがある。
Impurities can enter the interstices of a crystal lattice.
Compound of 格子点 (lattice point) + 間 (interval, space). The exact historical derivation is uncertain, but the term is a straightforward technical coinage.