An edition of I. A fire assay collection of osmium and ruthenium from natural sulfide concentrates (1964)

fire assay collection of osmium and ruthenium from natural sulfide concentrates.

II. Ion exchange separation of osmium from the base metals and the integration of osmium into a general scheme of analysis for the six platinum metals. III. A study of some osmium and ruthenium receiver solutions.

By Jon Clement Van Loon