From Online Dictionary of Crystallography

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Supermaille (Fr). Supercella (It). θΆ…ε˜δ½θƒž (Ja).

A cell C' obtained from a cell C by removing one or more translation vectors is called a supercell of C. The translation subgroup T' of the lattice L' built on C' is a subgroup of the translation subgroup T of the lattice L built on C and corresponds therefore to a sublattice of L.

See also