The geometry of Niggli reduction: SAUC - search of alternative unit cells.A database of lattices using the 6 representation of the Niggli-reduced cell as the search key provides a more robust and complete search than older techniques. 
SAUC
The geometry of Niggli reduction: SAUC - search of alternative unit cells.A database of lattices using the 6 representation of the Niggli-reduced cell as the search key provides a more robust and complete search than older techniques. 
SAUC