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Osmium 1

Definition: A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight Specific gravity

osmium 2

Definition: a hard brittle blue-gray or blue-black metallic element that is one of the platinum metals; the heaviest metal known

 

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