Iridium Definition

ĭ-rĭdē-əm
noun
A white, extremely dense, brittle, corrosion-resistant chemical element, one of the platinum metals: alloys of iridium are used in electrodes, pen points, crucibles, etc.: symbol, Ir; at. no. 77
Webster's New World
Synonyms:
  • atomic number 77
  • ir

Origin of Iridium

  • From Latin īris īrid- rainbow (from the colors produced by dissolving it in hydrochloric acid) irido– –ium

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek ἶρις (iris, “rainbow”) (because of the bright colour of many of iridium's salts).

    From Wiktionary

Iridium Sentence Examples

  • Iridium tetrachloride, IrC1 41 is obtained by dissolving the finely divided metal in aqua regia; by dissolving the hydroxide in hydrochloric acid; and by digesting the hydrated sesquichloride with nitric acid.

  • Aqua Regia, a mixture of nitric and hydrochloric acids, converts all metals (even gold, the "king of metals," whence the name) into chlorides, except only rhodium, iridium and ruthenium, which, when pure, are not attacked.

  • It may be obtained in the spongy form by igniting iridium ammonium chloride, and this variety of the metal readily oxidizes when heated in air.

  • Iridium sesquichloride, IrC1 31 is obtained when one of the corresponding double chlorides is heated with concentrated sulphuric acid, the mixture being then thrown into water.

  • Iridium sulphide, IrS, is obtained when the metal is ignited in sulphur vapour.

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Words Starting With

IIRIRI

Words Ending With

MUMIUM

Unscrambles

iridium

Words Starting With I and Ending With M

Starts With I & Ends With MStarts With IR & Ends With MStarts With I & Ends With UM

Word Length

7 Letter Words7 Letter Words Starting With I7 Letter Words Ending With M