銥（原子量：192217 2）有兩個天然同位素以及 34 個放射性同位素。其中，最穩定的放射性同位素是，其半衰期有 738 天，以及其核同質異能素：，其半衰期長達 241 年，其餘同位素半衰期都在 1 年以下，大部分都少於一日。 圖表 164Ir styletextalignright 77 styletextalignright 87 16399220 44 1 ms 2 styletextindent1em 164mIr colspan3 styletextindent2em 270 110 keV 94 27 µs 9 rowspan2165Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 88 rowspan216498752 23 rowspan21 µs 164Os rowspan212 rowspan2 rowspan2 （不常見） 161Re rowspan2 styletextindent1em 165mIr rowspan2 colspan3 styletextindent2em 180 50 keV rowspan2300 60 µs 87 164Os rowspan2112 rowspan2 rowspan2 13 161Re rowspan2166Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 89 rowspan216598582 22 rowspan2105 22 ms 93 162Re rowspan22 rowspan2 rowspan2 7 165Os rowspan2 styletextindent1em 166mIr rowspan2 colspan3 styletextindent2em 172 6 keV rowspan2151 9 ms 982 162Re rowspan29 rowspan2 rowspan2 18 165Os rowspan3167Ir rowspan3 styletextalignright 77 rowspan3 styletextalignright 90 rowspan3166981665 20 rowspan3352 20 ms 48 163Re rowspan312 rowspan3 rowspan3 32 166Os 20 167Os rowspan3 styletextindent1em 167mIr rowspan3 colspan3 styletextindent2em 1753 22 keV rowspan3300 6 ms 80 163Re rowspan3112 rowspan3 rowspan3 20 167Os 4 166Os rowspan2168Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 91 rowspan216797988 16 rowspan2161 21 ms 164Re rowspan2high rowspan2 rowspan2 （不常見） 168Os styletextindent1em 168mIr colspan3 styletextindent2em 50 100 keV 125 40 ms 164Re low rowspan2169Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 92 rowspan2168976295 28 rowspan2780 360 ms 064 4624 s 165Re rowspan212 rowspan2 rowspan2 （不常見） 169Os rowspan2 styletextindent1em 169mIr rowspan2 colspan3 styletextindent2em 154 24 keV rowspan2308 22 ms 72 165Re rowspan2112 rowspan2 rowspan2 28 169Os rowspan2170Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 93 rowspan216997497 11 rowspan2910 150 ms 087 1812 s 64 170Os rowspan2low rowspan2 rowspan2 36 166Re styletextindent1em 170mIr colspan3 styletextindent2em 270 70 keV 440 60 ms high rowspan2171Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 94 rowspan217097163 4 rowspan236 10 s 32 137 s 58 167Re rowspan212 rowspan2 rowspan2 42 171Os styletextindent1em 171mIr colspan3 styletextindent2em 180 30 keV 140 10 s 112 rowspan2172Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 95 rowspan217197046 11 rowspan244 3 s 98 172Os rowspan23 rowspan2 rowspan2 2 168Re rowspan2 styletextindent1em 172mIr rowspan2 colspan3 styletextindent2em 280 100 keV rowspan220 1 s 77 172Os rowspan27 rowspan2 rowspan2 23 168Re rowspan2173Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 96 rowspan2172967502 15 rowspan290 8 s 93 173Os rowspan23252 rowspan2 rowspan2 7 169Re rowspan2 styletextindent1em 173mIr rowspan2 colspan3 styletextindent2em 253 27 keV rowspan2220 5 s 88 173Os rowspan2112 rowspan2 rowspan2 12 169Re rowspan2174Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 97 rowspan2173966861 30 rowspan279 6 s 995 174Os rowspan23 rowspan2 rowspan2 5 170Re rowspan2 styletextindent1em 174mIr rowspan2 colspan3 styletextindent2em 193 11 keV rowspan249 3 s 9953 174Os rowspan27 rowspan2 rowspan2 47 170Re rowspan2175Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 98 rowspan2174964113 21 rowspan29 2 s 9915 175Os rowspan252 rowspan2 rowspan2 85 171Re rowspan2176Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 99 rowspan2175963649 22 rowspan283 6 s 979 176Os rowspan2 rowspan2 rowspan2 21 172Re rowspan2177Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 100 rowspan2176961302 21 rowspan230 2 s 9994 177Os rowspan252 rowspan2 rowspan2 06 173Re 178Ir styletextalignright 77 styletextalignright 101 177961082 21 12 2 s 178Os 179Ir styletextalignright 77 styletextalignright 102 178959122 12 79 1 s 179Os 52 180Ir styletextalignright 77 styletextalignright 103 179959229 23 15 1 min 180Os 45 181Ir styletextalignright 77 styletextalignright 104 180957625 28 490 15 min 181Os 52 182Ir styletextalignright 77 styletextalignright 105 181958076 23 15 1 min 182Os 3 rowspan2183Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 106 rowspan2182956846 27 rowspan257 4 min 9995 183Os rowspan252 rowspan2 rowspan2 05 179Re 184Ir styletextalignright 77 styletextalignright 107 18395748 3 309 3 h 184Os 5 styletextindent1em 184m1Ir colspan3 styletextindent2em 22565 11 keV 470 30 µs 3 styletextindent1em 184m2Ir colspan3 styletextindent2em 32840 24 keV 350 90 ns 7 185Ir styletextalignright 77 styletextalignright 108 18495670 3 144 1 h 185Os 52 186Ir styletextalignright 77 styletextalignright 109 185957946 18 1664 3 h 186Os 5 rowspan2 styletextindent1em 186mIr rowspan2 colspan3 styletextindent2em 08 4 keV rowspan2192 5 h 186Os rowspan22 rowspan2 rowspan2 IT （不常見） 186Ir 187Ir styletextalignright 77 styletextalignright 110 186957363 7 105 3 h 187Os 32 styletextindent1em 187m1Ir colspan3 styletextindent2em 18615 4 keV 303 6 ms IT 187Ir 92 styletextindent1em 187m2Ir colspan3 styletextindent2em 43381 9 keV 152 12 ns 112 188Ir styletextalignright 77 styletextalignright 111 187958853 8 415 5 h 188Os 1 rowspan2 styletextindent1em 188mIr rowspan2 colspan3 styletextindent2em 970 30 keV rowspan242 2 ms IT 188Ir rowspan27 rowspan2 rowspan2 （不常見） 188Os 189Ir styletextalignright 77 styletextalignright 112 188958719 14 132 1 d 189Os 32 styletextindent1em 189m1Ir colspan3 styletextindent2em 37218 4 keV 133 3 ms IT 189Ir 112 styletextindent1em 189m2Ir colspan3 styletextindent2em 23333 4 keV 37 2 ms 252 190Ir styletextalignright 77 styletextalignright 113 1899605460 18 1178 10 d 190Os 4 styletextindent1em 190m1Ir colspan3 styletextindent2em 261 1 keV 1120 3 h IT 190Ir 1 styletextindent1em 190m2Ir colspan3 styletextindent2em 36154 25 keV 2 µs 4 styletextindent1em 190m3Ir colspan3 styletextindent2em 3764 1 keV 3087 12 h 11 191Ir styletextalignright 77 styletextalignright 114 1909605940 18 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 187Re 32 0373 2 03723 9 styletextindent1em 191m1Ir colspan3 styletextindent2em 17124 5 keV 494 3 s IT 191Ir 112 styletextindent1em 191m2Ir colspan3 styletextindent2em 2120 40 keV 55 7 s rowspan2192Ir rowspan2 styletextalignright 77 rowspan2 styletextalignright 115 rowspan21919626050 18 rowspan273827 13 d 9524 192Pt rowspan24 rowspan2 rowspan2 476 192Os styletextindent1em 192m1Ir colspan3 styletextindent2em 56720 5 keV 145 5 min 1 styletextindent1em 192m2Ir colspan3 styletextindent2em 16814 12 keV 241 9 y 11 193Ir styletextalignright 77 styletextalignright 116 1929629264 18 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 189Resup 32 0627 2 06277 9 styletextindent1em 193mIr colspan3 styletextindent2em 80240 6 keV 1053 4 d IT 193Ir 112 194Ir styletextalignright 77 styletextalignright 117 1939650784 18 1928 13 h 194Pt 1 styletextindent1em 194m1Ir colspan3 styletextindent2em 147078 5 keV 3185 24 ms IT 194Ir 4 styletextindent1em 194m2Ir colspan3 styletextindent2em 370 70 keV 171 11 d 1011 195Ir styletextalignright 77 styletextalignright 118 1949659796 18 25 2 h 195Pt 32 rowspan2 styletextindent1em 195mIr rowspan2 colspan3 styletextindent2em 100 5 keV rowspan238 2 h 95 195Pt rowspan2112 rowspan2 rowspan2 IT 5 195Ir 196Ir styletextalignright 77 styletextalignright 119 19596840 4 52 1 s 196Pt 0 rowspan2 styletextindent1em 196mIr rowspan2 colspan3 styletextindent2em 210 40 keV rowspan2140 2 h 997 196Pt rowspan21011 rowspan2 rowspan2 IT 196Ir 197Ir styletextalignright 77 styletextalignright 120 196969653 22 58 5 min 197Pt 32 rowspan2 styletextindent1em 197mIr rowspan2 colspan3 styletextindent2em 115 5 keV rowspan289 3 min 9975 197Pt rowspan2112 rowspan2 rowspan2 IT 25 197Ir 198Ir styletextalignright 77 styletextalignright 121 19797228 21 8 1 s 198Pt 199Ir styletextalignright 77 styletextalignright 122 19897380 4 20 s 199Pt 32 參考文獻 Isotope masses from Ame2003 Atomic Mass Evaluation by G Audi AH Wapstra C Thibault J Blachot and O Bersillon in Nuclear Physics A729 2003 Halflife spin and isomer data selected from these sources Editing notes on this articles talk page Audi Bersillon Blachot Wapstra The Nubase2003 evaluation of nuclear and decay properties Nuc Phys A 729 pp 3128 2003 National Nuclear Data Center Brookhaven National Laboratory Information extracted from the NuDat 21 database retrieved Sept 2005 David R Lide ed Norman E Holden in CRC Handbook of Chemistry and Physics 85th Edition online version CRC Press Boca Raton Florida 2005 Section 11 Table of the Isotopes Ir Category 銥