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osmium    音標拼音: ['ɑzmiəm]
n. 鋨



osmium
n 1: a hard brittle blue-grey or blue-black metallic element
that is one of the platinum metals; the heaviest metal
known [synonym: {osmium}, {Os}, {atomic number 76}]

osmium \os"mi*um\ ([o^]z"m[i^]*[u^]m), n. [Gr. 'osmh` a smell,
odor, akin to 'o`zein to smell. So named in allusion to the
strong chlorinelike odor of osmic tetroxide. See {Odor}.]
(Chem.)
A rare metallic element of the platinum group with atomic
number 76. It is 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 190.2. Specific gravity 22.477.
[1913 Webster PJC]

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  • Osmium - Wikipedia
    Osmium (from Ancient Greek ὀσμή (osmḗ) 'smell') is a chemical element; it has symbol Os and atomic number 76 It is a hard, brittle, bluish-white transition metal in the platinum group Osmium has the highest density of any stable element and one of the lowest abundances in the Earth's crust
  • Osmium | Definition, Properties, Uses, Facts | Britannica
    Osmium, chemical element, one of the platinum metals of the periodic table and the densest naturally occurring element A gray-white metal, osmium is very hard, brittle, and difficult to work, even at high temperatures Pure osmium metal does not occur in nature
  • Osmium - Element information, properties and uses | Periodic Table
    Osmium occurs uncombined in nature and also in the mineral osmiridium (an alloy with iridium) Most osmium is obtained commercially from the wastes of nickel refining
  • Osmium: The Rarest Precious Metal Explained—Why Collectors And . . .
    Osmium is the rarest and densest naturally occurring precious metal, with global annual production of less than 1 ton, making it far scarcer than gold or platinum
  • Osmium Facts - Element 76 Symbol Os - Science Notes and Projects
    Osmium is an extremely hard and dense metallic element with symbol Os and atomic number 76 Although it is a rare element, you encounter it in daily life in ballpoint pens and electrical contacts
  • Osmium Facts, Symbol, Discovery, Properties, Uses
    Osmium (pronounced as OZ-mee-em) belongs to the family of transition metals and denoted by the chemical symbol Os It has thirty-four isotopes out of which seven occur naturally with osmium-92 having an abundance of 40 78% in the earth’s crust [1, 3]
  • What is osmium (Os)? An overview of the rarest and densest precious . . .
    What is osmium? What is it used for? How dense is it? Everything about the densest precious metal — from properties and forms to jewelry and industrial applications
  • Osmium Element Facts - chemicool. com
    Osmium is principally used alloyed with other metals in the platinum group to produce very hard alloys An alloy of 90% platinum and 10% osmium is used in surgical implants such as pacemakers and replacement heart valves
  • Osmium: Properties, Uses, and Applications - Comprehensive Guide
    Explore the unique properties and applications of osmium, the densest naturally occurring element Learn about its industrial uses, potential medical applications, chemical characteristics, and safety guidelines
  • Osmium | Os (Element) - PubChem
    Today, osmium is primarily recovered during the processing of platinum and nickel ores Discovered in 1803 by Tennant in the residue left when crude platinum is dissolved by aqua regia The metal is lustrous, bluish white, extremely hard, and brittle even at high temperatures





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