The contraction types of parallelohedra in E5
Using the process of zone contraction and its inverse, zone extension, the 179372 contraction types of parallelohedra in E(5) were derived from the 84 combinatorial types of relatively or totally zone-contracted parallelohedra.
Engel
P
Laboratory of Crystallography, University of Berne, Freiestrasse 3, CH-3012 Berne, Switzerland. peter.engel@krist.unibe.ch.