A tutorial on cubic and hexagonal crystal lattices, unit cells, closest packing, interstices, and material examples. Includes exercises and problems. Crossed stereoscopic diagrams enhance the understanding of three-dimensional structures.
Material Type: Tutorial
Technical Format: HTML/Text
Date Added to MERLOT: March 21, 2001
Date Modified in MERLOT: February 14, 2011
Submitter: Steven F. Watkins
Primary Audience: College General Ed
Mobile Compatibility: Not specified at this time
Cost Involved: no
Source Code Available: no
Accessiblity Information Available: no
Creative Commons: unsure
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Discussion for Crystal Lattices
4 years ago
Gustavo Avitabile (Faculty)
The site is a useful presentation of crystallographic issues regarding packing of simple objects, like equal atoms (as in metals) or simple ions. The title, Crystal lattices, is too ambitious, because lower symmetry crystal structures, as found in most organic and complex inorganic compounds, are not treated. The learning level is rather difficult and probably unsuited for an undergraduate student. I think the best use would be to complement a frontal lesson, with text and figures. The text is not so easy to read, even typographically: use of letter p rather then the greek letter for number pi is disturbing. Drawings included in the text are good in quality and well illustrate the sterical concepts, that are sometimes hard for newcomers.
MDL drawings are very well done and are nice to use with Chime plugin. However, for those who don't have the plugin, the start orientation of the structure (the only one they can see) is not happily chosen: a skew prospective would show the sterical features better.
Time spent reviewing site: 30 min