GESUS, an Interactive Computer Application for Teaching and Learning the Space Groups of Symmetry

Education Sciences

Domingo Martín¹  Adolfo Miras¹  Agustín Cota² 

[1] Department of Crystallography, Mineralogy and Agricultural Chemistry, University of Seville, 41012 Seville, Spain;X-ray Laboratory, Research Technology and Innovation Center (CITIUS), University of Seville, 41012 Seville, Spain;

关键词: chemistry;    geological science;    condensed matter physic;    symmetry properties;    crystallography;    Space Groups of Symmetry;   

DOI  :  10.3390/educsci12020085

来源: DOAJ

【 摘 要 】

This paper describes a digital application designed for learning Space Groups of Symmetry (SGS). It teaches how to recognize the operations performed by the symmetry elements, both point (or 2D) operators (proper and improper rotations, including mirroring, inversion, and other rotoinversions), and space (or 3D) operators (screw axes and glide planes), as well as their combinations with the translations of the lattice. The software applies a 3D space vision to identify the elements of symmetry compatible with the proposed structural models. The symbols of internationally accepted representation are used. The system, class, and space group of the crystal that agree with the proposed model are solved. Two settings are taken into account in the Monoclinic system. The application self-evaluates and assesses the knowledge acquired, allowing each exercise to be re-done until it is correctly completed with the appropriate recommendations. This application constitutes a useful and easy-to-use tool for SGS learning. It is aimed at beginner students of crystallography, with elementary knowledge about elements of symmetry, Bravais lattices, crystal classes, and wallpaper groups.

【 授权许可】

Unknown