Open AccessOn the distribution of radium in the Earth's crust
Author(s) -
Robert John Strutt
Publication year - 1906
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1906.0065
Subject(s) - igneous rock , radium , slates , crust , geology , sedimentary rock , geochemistry , hydrochloric acid , mineralogy , carbonate , baltic shield , carbonate rock , chemistry , radiochemistry , inorganic chemistry , organic chemistry
In a paper read before the Society on April 5, I gave determinations of the quantity of radium in igneous rocks. Similar data for sedimentary deposits will now he given to complete my survey of the radium content of the earth’s crust. The limestones examined (oolite, chalk, marble, etc.) were simply dissolved in hydrochloric acid, and the emanation extracted from the solution. All other rocks (including sandstones, clays, slates, gravel) were first fused with sodium carbonate, in exactly the same way as the igneous rocks dealt with in the former paper. I believe that in some cases, clays for instance, this is unnecessary; for determinations made on clay simply treated with hydrochloric acid gave the full quantity of emanation. But to avoid any doubt, fusion was always resorted to.