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The form relations of the lead oxychlorides, laurionite, paralaurionite, and fiedlerite

Published online by Cambridge University Press:  14 March 2018

Charles Palache*
Affiliation:
Harvard University, Cambridge, Massachusetts

Extract

The published data on these three minerals, first found in the Laurion lead slags, is well summarized in Hintze (Handb. Min., 1915, vol. 1, pp. 2632-2641). In studying the original papers for the purpose of recalculating the elements of each, LaForge was impressed with their close crystallographic relationship in certain respects and with the curious complexity of the form series of fledlerite, which seemed to call for further observations. Accordingly, crystals of all three minerals from Laurion were studied on the goniometer, specimens loaned by the U.S. National Museum furnishing a welcome supplement to those found in the Harvard Mineralogical Museum. In the following pages the results of these studies will first be presented in brief form. Following this, the conclusion arrived at as to the most appropriate positions of the three minerals to bring out their mutual relationships will be stated.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1934

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