at the X's back
a-dhelergh X
at the X oor Kornies
at the X
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worth an X
y'n X
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places etc
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at the X
My a wel an ki.langbot langbot
at the X
My a red y lyver.langbot langbot
at the X's back
Yma dhymm kothman.langbot langbot
at the back of X
Yma hi ow kwiska pows wynn hedhyw.langbot langbot
at the back of the X
Gwell yw genev koffi.langbot langbot
at the back of an X
Hemm yw klavji.langbot langbot
ridium is a chemical element with the symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm3 (0.815 lb/cu in) as defined by experimental X-ray crystallography.[a] It is the most corrosion-resistant metal, even at temperatures as high as 2,000 °C (3,630 °F). Although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable. Iridium was discovered in 1803 among insoluble impurities in natural platinum. Smithson Tennant, the primary discoverer, named it after the Greek goddess Iris, personification of the rainbow, because of the striking and diverse colors of its salts. Iridium is one of the rarest elements in Earth's crust, with annual production and consumption of only 3 tonnes (6.6 thousand pounds). 191Ir and 193Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes; the latter is the more abundant. The most important iridium compounds in use are the salts and acids it forms with chlorine, though iridium also forms a number of organometallic compounds used in industrial catalysis, and in research. Iridium metal is employed when high corrosion resistance at high temperatures is needed, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process. Iridium radioisotopes are used in some radioisotope thermoelectric generators.
Yth esov vy ow tybri aval.langbot langbot
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