Isotopes of platinum explained

Naturally occurring platinum (78Pt) consists of five stable isotopes (192Pt, 194Pt, 195Pt, 196Pt, 198Pt) and one very long-lived (half-life 4.83×1011 years) radioisotope (190Pt). There are also 34 known synthetic radioisotopes, the longest-lived of which is 193Pt with a half-life of 50 years. All other isotopes have half-lives under a year, most under a day. All isotopes of platinum are either radioactive or observationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed. Platinum-195 is the most abundant isotope.

List of isotopes

|-id=Platinum-165| 165Pt| style="text-align:right" | 78| style="text-align:right" | 87| 164.99966(43)#| 370(180) μs| α| 161Os| 7/2−#|||-id=Platinum-166| 166Pt| style="text-align:right" | 78| style="text-align:right" | 88| 165.99487(32)#| 294(62) μs| α| 162Os| 0+|||-id=Platinum-167| 167Pt| style="text-align:right" | 78| style="text-align:right" | 89| 166.99275(33)#| 920(120) μs| α| 163Os| 7/2−#|||-id=Platinum-168| rowspan=2|168Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 90| rowspan=2|167.98818(16)| rowspan=2|2.02(10) ms| α| 164Os| rowspan=2|0+| rowspan=2|| rowspan=2||-| β+ ?| 168Ir|-id=Platinum-169| rowspan=2|169Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 91| rowspan=2|168.98662(22)#| rowspan=2|6.99(9) ms| α| 165Os| rowspan=2|(7/2−)| rowspan=2|| rowspan=2||-| β+ ?| 169Ir|-id=Platinum-170| rowspan=2|170Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 92| rowspan=2|169.982502(20)| rowspan=2|13.93(16) ms| α| 166Os| rowspan=2|0+| rowspan=2|| rowspan=2||-| β+ ?| 170Ir|-id=Platinum-171| rowspan=2|171Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 93| rowspan=2|170.981249(87)| rowspan=2|45.5(25) ms| α (86%)| 167Os| rowspan=2|7/2−| rowspan=2|| rowspan=2||-| β+ (14%)| 171Ir|-id=Platinum-171m| style="text-indent:1em" | 171mPt| colspan=3 style="text-indent:2em" | 412.6(10) keV| 901(9) ns| IT| 171Pt| 13/2+|||-id=Platinum-172| rowspan=2|172Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 94| rowspan=2|171.977341(11)| rowspan=2|97.6(13) ms| α (96%)| 168Os| rowspan=2|0+| rowspan=2|| rowspan=2||-| β+ (4%)| 172Ir|-id=Platinum-173| rowspan=2|173Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 95| rowspan=2|172.976450(68)| rowspan=2|382(2) ms| α (86%)| 169Os| rowspan=2|(5/2−)| rowspan=2|| rowspan=2||-| β+ (14%)| 173Ir|-id=Platinum-174| rowspan=2|174Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 96| rowspan=2|173.972820(11)| rowspan=2|862(8) ms| α (74.9%)| 170Os| rowspan=2|0+| rowspan=2|| rowspan=2||-| β+ (25.1%)| 174Ir|-id=Platinum-175| rowspan=2|175Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 97| rowspan=2|174.972401(20)| rowspan=2|2.43(4) s| α (64%)| 171Os| rowspan=2|(7/2−)| rowspan=2|| rowspan=2||-| β+ (36%)| 175Ir|-id=Platinum-176| rowspan=2|176Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 98| rowspan=2|175.968938(14)| rowspan=2|6.33(15) s| β+ (60%)| 176Ir| rowspan=2|0+| rowspan=2| | rowspan=2||-| α (40%)| 172Os|-id=Platinum-177| rowspan=2|177Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 99| rowspan=2|176.968470(16)| rowspan=2|10.0(04) s| β+ (94.3%)| 177Ir| rowspan=2|5/2−| rowspan=2|| rowspan=2||-| α (5.7%)| 173Os|-id=Platinum-177m| style="text-indent:1em" | 177mPt| colspan=3 style="text-indent:2em" | 147.5(4) keV| 2.35(4) μs| IT| 177Pt| 1/2−|||-id=Platinum-178| rowspan=2|178Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 100| rowspan=2|177.965649(11)| rowspan=2|20.7(7) s| β+ (92.3%)| 178Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (7.7%)| 174Os|-id=Platinum-179| rowspan=2|179Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 101| rowspan=2|178.9653588(86)| rowspan=2|21.2(4) s| β+ (99.76%)| 179Ir| rowspan=2|1/2−| rowspan=2|| rowspan=2||-| α (0.24%)| 175Os|-id=Platinum-180| rowspan=2|180Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 102| rowspan=2|179.963038(11)| rowspan=2|56(3) s| β+ (99.48%)| 180Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (0.52%)| 176Os|-id=Platinum-181| rowspan=2|181Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 103| rowspan=2|180.963090(15)| rowspan=2|52.0(22) s| β+ (99.93%)| 181Ir| rowspan=2|1/2−| rowspan=2|| rowspan=2||-| α (0.074%)| 177Os|-id=Platinum-181m| style="text-indent:1em" | 181mPt| colspan=3 style="text-indent:2em" | 116.65(8) keV| >300 ns| IT| 181Pt| 7/2−|||-id=Platinum-182| rowspan=2|182Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 104| rowspan=2|181.961172(14)| rowspan=2|2.67(12) min| β+ (99.962%)| 182Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (0.038%)| 178Os|-id=Platinum-183| rowspan=2|183Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 105| rowspan=2|182.961596(15)| rowspan=2|6.5(10) min| β+ (99.99%)| 183Ir| rowspan=2|1/2−| rowspan=2|| rowspan=2||-| α (0.0096%)| 179Os|-id=Platinum-183m1| rowspan=3 style="text-indent:1em" | 183m1Pt| rowspan=3 colspan=3 style="text-indent:2em" | 34.74(7) keV| rowspan=3|43(5) s| β+ (96.9%)| 183Ir| rowspan=3|7/2−| rowspan=3|| rowspan=3||-| IT (3.1%)| 183Pt|-| α ?| 179Os|-id=Platinum-183m2| style="text-indent:1em" | 183m2Pt| colspan=3 style="text-indent:2em" | 195.90(10) keV| >150 ns| IT| 183Pt| 9/2+|||-id=Platinum-184| rowspan=2|184Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 106| rowspan=2|183.959922(16)| rowspan=2|17.3(2) min| β+ | 184Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (0.0017%)| 180Os|-id=Platinum-184m| style="text-indent:1em" | 184mPt| colspan=3 style="text-indent:2em" | 1840.3(8) keV| 1.01(5) ms| IT| 184Pt| 8−|||-id=Platinum-185| rowspan=2|185Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 107| rowspan=2|184.960614(28)| rowspan=2|70.9(24) min| β+ | 185Ir| rowspan=2|9/2+| rowspan=2|| rowspan=2||-| α (0.0050%)| 181Os|-id=Platinum-185m1| style="text-indent:1em" | 185m1Pt| colspan=3 style="text-indent:2em" | 103.41(5) keV| 33.0(8) min| β+| 185Ir| 1/2−|||-id=Platinum-185m2| style="text-indent:1em" | 185m2Pt| colspan=3 style="text-indent:2em" | 200.89(4) keV| 728(20) ns| IT| 185Pt| 5/2−|||-id=Platinum-186| rowspan=2|186Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 108| rowspan=2|185.959351(23)| rowspan=2|2.08(5) h| β+| 186Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (1.4×10−4%)| 182Os|-id=Platinum-187| 187Pt| style="text-align:right" | 78| style="text-align:right" | 109| 186.960617(26)| 2.35(3) h| β+| 187Ir| 3/2−|||-id=Platinum-187m| style="text-indent:1em" | 187mPt| colspan=3 style="text-indent:2em" | 174.38(22) keV| 311(15) μs| IT| 187Pt| 11/2+|||-id=Platinum-188| rowspan=2|188Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 110| rowspan=2|187.9593975(57)| rowspan=2|10.16(18) d| EC| 188Ir| rowspan=2|0+| rowspan=2|| rowspan=2||-| α (2.6×10−5%)| 184Os|-id=Platinum-189| 189Pt| style="text-align:right" | 78| style="text-align:right" | 111| 188.960848(11)| 10.87(12) h| β+| 189Ir| 3/2−|||-id=Platinum-189m1| style="text-indent:1em" | 189m1Pt| colspan=3 style="text-indent:2em" | 172.79(6) keV| 464(25) ns| IT| 189Pt| 9/2−|||-id=Platinum-189m2| style="text-indent:1em" | 189m2Pt| colspan=3 style="text-indent:2em" | 191.6(4) keV| 143(5) μs| IT| 189Pt| (13/2+)|||-id=Platinum-190| 190Pt| style="text-align:right" | 78| style="text-align:right" | 112| 189.95994982(71)| 4.83(3)×1011 y| α[1] | 186Os| 0+| 1.2(2)×10−4||-id=Platinum-191| 191Pt| style="text-align:right" | 78| style="text-align:right" | 113| 190.9616763(44)| 2.83(2) d| EC| 191Ir| 3/2−|||-id=Platinum-191m1| style="text-indent:1em" | 191m1Pt| colspan=3 style="text-indent:2em" | 100.663(20) keV| >1 μs| IT| 191Pt| 9/2−|||-id=Platinum-191m2| style="text-indent:1em" | 191m2Pt| colspan=3 style="text-indent:2em" | 149.035(22) keV| 95(5) μs| IT| 191Pt| 13/2+|||-id=Platinum-192| 192Pt| style="text-align:right" | 78| style="text-align:right" | 114| 191.9610427(28)| colspan=3 align=center|Observationally Stable[2] | 0+| 0.00782(24)||-id=Platinum-192m| style="text-indent:1em" | 192mPt| colspan=3 style="text-indent:2em" | 2172.37(13) keV| 272(23) ns| IT| 192Pt| 10−|||-id=Platinum-193| 193Pt| style="text-align:right" | 78| style="text-align:right" | 115| 192.9629845(15)| 50(6) y| EC| 193Ir| 1/2−|||-id=Platinum-193m| style="text-indent:1em" | 193mPt| colspan=3 style="text-indent:2em" | 149.78(4) keV| 4.33(3) d| IT| 193Pt| 13/2+|||-id=Platinum-194| 194Pt| style="text-align:right" | 78| style="text-align:right" | 116| 193.96268350(53)| colspan=3 align=center|Observationally Stable[3] | 0+| 0.3286(41)||-id=Platinum-195| 195Pt| style="text-align:right" | 78| style="text-align:right" | 117| 194.96479433(54)| colspan=3 align=center|Observationally Stable[4] | 1/2−| 0.3378(24)||-id=Platinum-195m| style="text-indent:1em" | 195mPt| colspan=3 style="text-indent:2em" | 259.077(23) keV| 4.010(5) d| IT| 195Pt| 13/2+|||-id=Platinum-196| 196Pt| style="text-align:right" | 78| style="text-align:right" | 118| 195.96495465(55)| colspan=3 align=center|Observationally Stable[5] | 0+| 0.2521(34)||-id=Platinum-197| 197Pt| style="text-align:right" | 78| style="text-align:right" | 119| 196.96734303(58)| 19.8915(19) h| β−| 197Au| 1/2−|||-id=Platinum-197m| rowspan=2 style="text-indent:1em" | 197mPt| rowspan=2 colspan=3 style="text-indent:2em" | 399.59(20) keV| rowspan=2|95.41(18) min| IT (96.7%)| 197Pt| rowspan=2|13/2+| rowspan=2|| rowspan=2||-| β− (3.3%)| 197Au|-id=Platinum-198| 198Pt| style="text-align:right" | 78| style="text-align:right" | 120| 197.9678967(23)| colspan=3 align=center|Observationally Stable[6] | 0+| 0.0734(13)||-id=Platinum-199| 199Pt| style="text-align:right" | 78| style="text-align:right" | 121| 198.9705970(23)| 30.80(21) min| β−| 199Au| 5/2−|||-id=Platinum-199m| style="text-indent:1em" | 199mPt| colspan=3 style="text-indent:2em" | 424(2) keV| 13.48(16) s| IT| 199Pt| 13/2+|||-id=Platinum-200| 200Pt| style="text-align:right" | 78| style="text-align:right" | 122| 199.971445(22)| 12.6(3) h| β−| 200Au| 0+|||-id=Platinum-201| 201Pt| style="text-align:right" | 78| style="text-align:right" | 123| 200.974513(54)| 2.5(1) min| β−| 201Au| (5/2−)|||-id=Platinum-202| 202Pt| style="text-align:right" | 78| style="text-align:right" | 124| 201.975639(27)| 44(15) h| β−| 202Au| 0+|||-id=Platinum-202m| style="text-indent:1em" | 202mPt| colspan=3 style="text-indent:2em" | 1788.5(4) keV| 141(7) μs| IT| 202Pt| (7−)|||-id=Platinum-203| 203Pt| style="text-align:right" | 78| style="text-align:right" | 125| 202.97906(22)#| 22(4) s| β−| 203Au| (1/2−)|||-id=Platinum-203m1| rowspan=2 style="text-indent:1em" | 203m1Pt| rowspan=2 colspan=3 style="text-indent:2em" | 1367(3)# keV| rowspan=2 | 12(5) s| β−| 203Au| rowspan=2 | 13/2+#| rowspan=2 || rowspan=2 ||-| IT ?| 203Pt|-id=Platinum-203m2| style="text-indent:1em" | 203m2Pt| colspan=3 style="text-indent:2em" | 1420(50)# keV| >100# ns| IT| 203Pt| 27/2−#|||-id=Platinum-203m3| style="text-indent:1em" | 203m3Pt| colspan=3 style="text-indent:2em" | 2530(50)# keV| 641(55) ns| IT| 203Pt| 33/2+#|||-id=Platinum-204| 204Pt| style="text-align:right" | 78| style="text-align:right" | 126| 203.98108(22)#| 10.3(14) s| β−| 204Au| 0+|||-id=Platinum-204m1| style="text-indent:1em" | 204m1Pt| colspan=3 style="text-indent:2em" | 1995.1(07) keV| 5.5(7) μs| IT| 204Pt| (5−)|||-id=Platinum-204m2| style="text-indent:1em" | 204m2Pt| colspan=3 style="text-indent:2em" | 2035(23) keV| 55(3) μs| IT| 204Pt| (7−)|||-id=Platinum-204m3| style="text-indent:1em" | 204m3Pt| colspan=3 style="text-indent:2em" | 3193(23) keV| 146(14) ns| IT| 204Pt| (10+)|||-id=Platinum-205| 205Pt| style="text-align:right" | 78| style="text-align:right" | 127| 204.98624(32)#| 2# s| β− ?| 205Au| 9/2+#|||-id=Platinum-206| rowspan=2 | 206Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 128| rowspan=2 | 205.99008(32)#| rowspan=2 | 500# ms| β− ?| 206Au| rowspan=2 | 0+| rowspan=2 || rowspan=2 ||-| β−n ?| 205Au|-id=Platinum-207| rowspan=2 | 207Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 129| rowspan=2 | 206.99556(43)#| rowspan=2 | 600# ms| β− ?| 207Au| rowspan=2 | 9/2+#| rowspan=2 | | rowspan=2 | |-| β−n ?| 206Au|-id=Platinum-208| rowspan=2 | 208Pt| rowspan=2 style="text-align:right" | 78| rowspan=2 style="text-align:right" | 130| rowspan=2 | 207.99946(43)#| rowspan=2 | 220# ms| β− ?| 208Au| rowspan=2 | 0+| rowspan=2 | | rowspan=2 | |-| β−n ?| 207Au

References

Notes and References

  1. Theorized to also undergo β+β+ decay to 190Os
  2. Believed to undergo α decay to 188Os with a half-life over 6.0×1016 years
  3. Believed to undergo α decay to 190Os
  4. Believed to undergo α decay to 191Os with a half-life over 6.3×1018 years
  5. Believed to undergo α decay to 192Os
  6. Believed to undergo α decay to 194Os or double β− decay to 198Hg with a half-life over 3.20×1014 years

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes of platinum".

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