The Chemical EducatorISSN: 1430-4171 (electronic version) Abstract Volume 5
Issue 6 (2000) pp 296-305 Teaching Crystal Structures with 3-D SurfacesA. Mosset,* and M. Jacob Laboratoire de Cristallographie, CNRS, BP 166, 38042 Grenoble Cedex, France* and Institutionen för Skydd och Material, FOA, 14725 Tumba, Sweden Published online: 17 November 2000 Abstract. Using mathematics
from the method of the exponential scale, crystals inner and outer structures
are given. A number of fundamental crystal structures are described as
mathematical functions. Plotting the equations gives the classical ball
representation of the structures. In the case of intricate structures,
the pedagogical interest lies in the possibility of describing the whole
structure as the sum of very simple partial structures, each corresponding
to a part of the equation. Structures given are primitive cubic packing,
primitive hexagonal packing, face-centered-cubic close-packing, hexagonal
close-packing, body-centered packing, CsCl, diamond, zinc blende, CaF_{2},
ReO_{3}, perovskite, NaCl, Mg_{3}NF_{3}, SiO_{2},
Cu_{3}Au, NiAs, wurtzite, and graphite.
Key Words: In the Classroom; physical chemistry; crystalography (*) Corresponding author. (E-mail: mosset@labs.polycnrs-gre.fr) Article in PDF format (693 KB) HTML format Issue date: December 1, 2000 |