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The E-Sylum: Volume 4, Number 3, January 21, 2001, Article 6SPECIFIC GRAVITYDan Demeo writes: "With regard to Rafael Delgado's inquiry about metals having specific gravity around 7 (6.9-7.3), there are lots of choices, some of which could be eliminated easily:
There are quite a number of metals and alloys which fit the range specified. One way to determine the composition is to put the object in a scanning electron microscope (SEM) and analyze the surface using energy dispersive x-ray analysis (EDX). PCGS has had this done, so Mr. Delgado should be able to have his object (coin?) analyzed or authenticated through them. Or, he could look up local laboratories offering SEM/EDX services or x-ray fluorescence services. On the bad side, it might cost several hundred dollars for the analysis, but he will have an answer, which is always better than all the guesses in the world." Wayne Homren, EditorContent presented in The E-Sylum is not necessarily researched or independently fact-checked, and views expressed do not necessarily represent those of the Numismatic Bibliomania Society. This is a static archive page documenting the originally published content. Links were active at the time of publication but may no longer work. Check subsequent issues for corrections and commentary. The Numismatic Bibliomania Society is a non-profit organization promoting numismatic literature. For more information please see our web site at http://www.coinbooks.org/ There is a membership application available on the web site. To join, print the application and return it with your check to the address printed on the application. Visit the Membership page. Those wishing to become new E-Sylum subscribers (or wishing to Unsubscribe) can go to the following web page link. To submit items for publication in The E-Sylum, write to the Editor at this address: E-Sylum Editor Copyright © 1998 - 2020 The Numismatic Bibliomania Society (NBS) |
