ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Using isomorphism properties of translation groups, an intrinsic definition of the classes of perfect objects belonging to n dimensional space, such as crystals, semicrystals, non-crystals and perfect gas, is given. Through the partition of space group G with respect to its (invariant) translation sub-group T, its point group is defined, an isomorph of the group of classes G/T. Examples are given, with symmorphic or non-symmorphic objects in spaces E2, E3, E4 and En. Moreover, the unsuitable expression 'Bravais lattice' should be changed into 'Bravais type of cell'.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739478000868
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