External Symmetry of Crystals, 32 Crystal Classes

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Author:

Stephen Nelson

Subject:

Science and Technology

Institution Name:

Tulane University

Collection:

NAGT Cutting Edge (SERC)

Grade Level:

Post-secondary

Abstract:

This site is a lecture by Dr. Stephen Nelson from Tulane University that explores the 32 possible combinations of symmetry operations that define the external symmetry of crystals. The lecture defines the six crystal systems (triclinic, monoclinic, orthorhombic, tetragonal, hexagonal, and isometric) and explains the derivation of the Hermann-Mauguin symbols (also called the international symbols) used to describe the crystal classes from the symmetry content. Tables and illustrations accompany the text.

Course Type:

Learning Module

Languages:

English

Material Type:

Lecture Notes

Media Format:

Text/HTML, Downloadable docs

Conditions of Use:

Custom Permissions
The Tulane University website(s) includes a variety of materials, including but not limited to graphics, photographs, audio and video files, and text, created by different members of the Tulane community and these materials are owned in whole or in principal part by the Administrators of the Tulane Educational Fund. Although these works might be accessible freely on the World Wide Web and might not include any statement about copyright, the U.S. Copyright Act nevertheless provides that such works are protected by copyright. Users must assume that works are protected by copyright until they learn otherwise.

Copyright Holder:

Copyright 2001 Tulane University New Orleans, LA 70118