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Iridium potassium chloride

Iridium potassium chloride (K lrClg) is used as a black pigment to make black porcelain kitchen and bathroom fixtures. [Pg.162]

Potassium chlorosmate may also be obtained by heating the finely divided metal with potassium chloride in chlorine,1 by double decomposition of the sodium salt with potassium chloride,2 or by the action of hydrochloric acid on potassium osmyl oxynitrite.3 It is soluble in water, yielding a yellow solution from which alcohol precipitates it as a red crystalline powder. The crystals are deep red oetahedra, iso-morphous with the corresponding palladium, iridium, and platinum analogues. [Pg.216]

Ammonium Chloriridate, (NH4)2IrCI8, is readily produced by decomposing the sodium salt with ammonium chloride in aqueous solution.1 It crystallises in regular octahedra, reddish black in colour, and but slightly soluble in cold water, although appreciably soluble in hot. It does not dissolve in solutions of ammonium or potassium chloride. When evaporated with aqua regia, the ammonia is expelled, iridium tetrachloride remaining. Heated to 440° C. in a current of chlorine the tetrachloride is first formed and decomposes into the anhydrous trichloride. [Pg.246]

Potassium Iridi-nitrite, K3Ir(N02)6, which is conveniently prepared by adding sodium nitrite to a hot acidulated solution of sodium ehlor-iridite until it is bleached. The solution is boiled to expel nitrous oxides, and potassium chloride is added in excess, whereupon iridium potassium nitrite is precipitated as a white mass. [Pg.253]

It is also formed by adding potassium nitrite to a solution of iridium sulphate in the warm.1 It is a white powder, which readily dissolves in boiling water, but which is insoluble in potassium chloride solution. [Pg.253]

No such limitations bind the residue chemist who wants to make his own. There are, in my opinion, two easy ways to produce a good alkali flame detector from a suitable commercial FID. Both are inexpensive but may take a little practice. Method number 1 was described by Giuffrida and Ives (39, 40). A 26-gauge platinum—iridium wire helix, coated with potassium chloride, is mounted on a detector jet tip such that it is in contact with the flame (41). Method number 2 stems from... [Pg.44]

Zhou and collaborators devised a procedure for the synthesis of 2-substituted quinazolines via an iridium-catalyzed hydrogen transfer (Scheme 32) (13RSCA334). Treatment of 2-aminobenzylamines 69 with aryl and alkyl aldehydes and styrene as the hydrogen acceptor in the presence of (pentamethylcyclopentadienyl)iridium (III) chloride dimer in xylene under refluxing conditions afforded the desired products in moderate yields. A base, for example, potassium hydroxide, had to be added when employing benzyl alcohol instead of benzaldehyde to furnish 2-phenylquin-azoline (70) in 61% yield (Scheme 32). [Pg.412]

Moissan finally used as electrolyte a solution of dry potassium acid fluoride in anhydrous hydrofluoric acid. His apparatus consisted of two platinum-iridium electrodes sealed into a platinum U-tube closed with fluorspar screw caps covered with a layer of gum lac (42, 49, 59). The U-tube was chilled with methyl chloride, the gas now used in many modem refrigerators, to a temperature of —23°. [Pg.766]

Hexammino-iridium Ferricyanide, [Ir(NH3)6 [Fe(CN)6], is precipitated when potassium ferricyanide is added to a solution of the chloride. It crystallises in orange-red prisms and is sparingly. soluble in water. [Pg.217]

Hexammino-iridium Chloro-iridite, [Ir(NHs)6][IrCl6], is precipitated as an amorphous yellow powder on the addition of potassium chloro-iridite to hexammino-iridium chloride. From dilute solution it crystallises in small quadratic plates. It is soluble in cold water, and fairly stable towards concentrated sulphuric acid, which only attacks it above 190° C. [Pg.217]

Bromo - pentammino - iridium Bromide, [Ir(NH3)5Br]Br2, is prepared by boiling chloro-pentammino-iridium chloride with potassium hydroxide for five hours to form the hydroxide, and then adding excess of 50 per cent, hydrobromic acid. A white crystalline precipitate of aquo-pentammino-iridium bromide, [Ir(NH3)5H20]Br3, is obtained, and on heating a solution of this it is converted into the bromo-bromide. The salt separates in yellow rhombic prisms and is soluble in water.4... [Pg.219]

The preceding results fall considerably short of the modem standard of atomic weight work, and further determinations of the atomic weight of iridium are desirable. Archibald,4 in 1909, announced that he had determined the value Ir = 192-90 from analyses of potassium iridi-chloride, but no details of the work have yet been published. [Pg.241]

Potassium Chloriridite, K3IrCl6.3HaO, results (1) when potassium carbonate and chloriridate are heated to redness (2) on heating potassium chloriridate in hydrogen chloride at 440° C. Some insoluble iridium trichloride is simultaneously produced (3) it is also formed by reducing a suspension of chloriridate in water with sulphur dioxide, hydrogen sulphide, or nitric oxide.6 The salt crystallises in olive... [Pg.243]

Sodium Chloriridate, Na2IrCl6.6H20, is conveniently prepared in a similar manner to the potassium salt. It also results when solutions of iridium tetrachloride and sodium chloride are mixed and concentrated. The salt crystallises in triclinic prisms 3 isomorphous with the corresponding platinum salt, Na2PtCl6.6H20. [Pg.245]

Iridium Tri-iodide, Irl3.—This salt is stated to occur 3 when potassium iodiridate and ammonium chloride solutions are mixed, iodine and the tri-iodide separating out. The former is removed by treating with alcohol, the tri-iodide being left as a greenish powder. [Pg.247]


See other pages where Iridium potassium chloride is mentioned: [Pg.699]    [Pg.1028]    [Pg.1032]    [Pg.153]    [Pg.699]    [Pg.1028]    [Pg.1032]    [Pg.153]    [Pg.869]    [Pg.201]    [Pg.513]    [Pg.237]    [Pg.241]    [Pg.245]    [Pg.95]    [Pg.95]    [Pg.1595]    [Pg.95]    [Pg.27]    [Pg.2]    [Pg.181]    [Pg.204]    [Pg.105]    [Pg.218]    [Pg.222]    [Pg.703]    [Pg.23]    [Pg.381]    [Pg.514]    [Pg.1016]    [Pg.429]    [Pg.110]    [Pg.98]    [Pg.11]    [Pg.235]   
See also in sourсe #XX -- [ Pg.2 , Pg.276 , Pg.277 ]




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