Navigation in Crystallography

Research Article| April 01, 1946 NAVIGATION IN CRYSTALLOGRAPHY HORACE WINCHELL HORACE WINCHELL SHEFFIELD SCIENTIFIC SCHOOL, YALE UNIVERSITY, NEW HAVEN, CONN. Search for other works by this author on: GSW Google Scholar Author and Article Information HORACE WINCHELL SHEFFIELD SCIENTIFIC SCHOOL, YALE UNIVERSITY, NEW HAVEN, CONN. Publisher: Geological Society of America Received: 28 Sep 1945 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1946, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1946) 57 (4): 295–308. https://doi.org/10.1130/0016-7606(1946)57[295:NIC]2.0.CO;2 Article history Received: 28 Sep 1945 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation HORACE WINCHELL; NAVIGATION IN CRYSTALLOGRAPHY. GSA Bulletin 1946;; 57 (4): 295–308. doi: https://doi.org/10.1130/0016-7606(1946)57[295:NIC]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The similarity between obtaining a “fix” of location and course by using a zenith camera to photograph the position of the stars, and determining the orientation of a crystal such as diamond or corundum by using the back-reflection Laue method has led to the term, crystal navigation. The two techniques are strikingly similar except that the crystal navigator does not need a chronometer. Longitude, latitude, and course have analogues in crystallography; and an error in “setting the course” or in determining a position may make a jewel bearing fail or a diamond cutter wear badly or break. The several crystal projections—sterographic, gnomonic, back-reflection Laue, and forward-reflection Laue—are discussed. The back-reflection projection and the gnomonic projection together constitute an efficient and reasonably simple system for crystal navigation. The technique of crystal navigation in corundum and in diamond is illustrated by charts. The practical usefulness of the system is shown by reference to diamond-tool design. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.