McGraw-Hill Dictionary of Scientific & Technical Termslong-range order (solid-state physics)A tendency for some property of atoms in a lattice (such as spin orientation or type of atom) to follow a pattern which is repeated every few unit cells.long-range orderAtomic positions in a crystal exhibit a property calledlong-range orderor translational periodicity; positions repeat in space in a regular array. Encyclopdia BritannicaWikipediaThe order can consist either in a full crystallinespace group