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On the description of symmetry of OD structures (III). Short symbols for OD groupoid families

✍ Scribed by Dr. K. Fichtner

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
334 KB
Volume
15
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

Two kinds of short symbols are proposed: 1. The short symbol of any OD groupoid‐family consists of two parts: the symbol for the point group of the groupoid of partial symmetry operations and the symbol for the layer group. No information on the parameters is given. 2. The short symbol of any OD groupoid‐family consists of those parts that correspond to the lines of the full symbol. There is, however, only one of the partial symmetry operations given, which transform a layer into an adjacent layer. These short symbols are suitable for storage of the symmetry data of OD structures in computer operated data banks.

📜 SIMILAR VOLUMES

On the Description of Symmetry of OD Str
On the Description of Symmetry of OD Structures (I) OD Groupoid Family, Parameters, Stacking
✍ Dr. K. Fichtner 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 381 KB

## Abstract The relations between the groupoid of partial symmetry operations of an OD structure and the description of the symmetry of this structure by an OD groupoid family as well as parameters and the stacking of layers are discussed. Proposals are suggested for some changes in the symbols of