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" By fusion with nitre, it acquires a dull black colour, but recovers its original colour and lustre, by heating with charcoal. It consists of iridium, wirti a portion of osmium. "
An introduction to mineralogy: founded on the chemical composition of ... - Página 46
por Charles Moxon - 1838
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A System of Mineralogy, Volumen3

Robert Jameson - 1816 - 642 páginas
...foliated. It is brittle. It is harder than platina. Specific gravity, 19.5. Chemical Character!. By fusion with nitre, it acquires a dull black colour, but recovers its original colour and lustre by heating with charcoal. Constituent Parts. It is composed of Osmium and Iridium,...
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A Dictionary of Chemistry: On the Basis of Mr. Nicholson's, in ..., Volumen2

Andrew Ure - 1821 - 512 páginas
...Lustre shining and metallic. Fracture foliated. Brittle. Harder than platina. 8p. gr. 19.5. By fusion with nitre, it acquires a dull black colour, but recovers its original colour and lustre, by heating with charcoal. It consists of iridium, wirti a portion of osmium. It...
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An Elementary Introduction to the Knowledge of Mineralogy: Comprising Some ...

William Phillips - 1823 - 558 páginas
...possess a lamellar structure parallel to the terminal planes of the crystals, and are brittle. By fusion with nitre it acquires a dull black colour, but recovers its original colour and lustre, by heating on charcoal. P on M or M'. . 90° (X M on M' 120. 0 P on cl 124.42 c2...
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