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Ir |
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Ir, symbol for the element iridium iridium , metallic chemical element; symbol Ir; at. no. 77; at. wt. 192.22; m.p. about 2,410°C;; b.p. about 4,130°C;; sp. gr. 22.55 at 20°C;; valence +3 or +4.
..... Click the link for more information. . IR (1) (Industry Remarketer) Same as VAR or VAD.(2) See infrared, IR detector and IrDA. (3) See information resources. Ir (chemistry) IR Abbr. for “inside radius.”
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