Isotopes of platinum

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

 * 165Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 87
 * 164.99966(43)#
 * 370(180) μs
 * α
 * 161Os
 * 7/2−#
 * 166Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 88
 * 165.99487(32)#
 * 294(62) μs
 * α
 * 162Os
 * 0+
 * 167Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 89
 * 166.99275(33)#
 * 920(120) μs
 * α
 * 163Os
 * 7/2−#
 * 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
 * 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
 * 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
 * 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
 * style="text-indent:1em" | 171mPt
 * colspan=3 style="text-indent:2em" | 412.6(10) keV
 * 901(9) ns
 * IT
 * 171Pt
 * 13/2+
 * 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
 * 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
 * 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
 * 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
 * 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
 * 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
 * style="text-indent:1em" | 177mPt
 * colspan=3 style="text-indent:2em" | 147.5(4) keV
 * 2.35(4) μs
 * IT
 * 177Pt
 * 1/2−
 * 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
 * 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
 * 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
 * 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
 * style="text-indent:1em" | 181mPt
 * colspan=3 style="text-indent:2em" | 116.65(8) keV
 * >300 ns
 * IT
 * 181Pt
 * 7/2−
 * 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
 * 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
 * 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
 * style="text-indent:1em" | 183m2Pt
 * colspan=3 style="text-indent:2em" | 195.90(10) keV
 * >150 ns
 * IT
 * 183Pt
 * 9/2+
 * 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
 * style="text-indent:1em" | 184mPt
 * colspan=3 style="text-indent:2em" | 1840.3(8) keV
 * 1.01(5) ms
 * IT
 * 184Pt
 * 8−
 * 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
 * style="text-indent:1em" | 185m1Pt
 * colspan=3 style="text-indent:2em" | 103.41(5) keV
 * 33.0(8) min
 * β+
 * 185Ir
 * 1/2−
 * style="text-indent:1em" | 185m2Pt
 * colspan=3 style="text-indent:2em" | 200.89(4) keV
 * 728(20) ns
 * IT
 * 185Pt
 * 5/2−
 * 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
 * 187Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 109
 * 186.960617(26)
 * 2.35(3) h
 * β+
 * 187Ir
 * 3/2−
 * style="text-indent:1em" | 187mPt
 * colspan=3 style="text-indent:2em" | 174.38(22) keV
 * 311(15) μs
 * IT
 * 187Pt
 * 11/2+
 * 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
 * 189Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 111
 * 188.960848(11)
 * 10.87(12) h
 * β+
 * 189Ir
 * 3/2−
 * style="text-indent:1em" | 189m1Pt
 * colspan=3 style="text-indent:2em" | 172.79(6) keV
 * 464(25) ns
 * IT
 * 189Pt
 * 9/2−
 * style="text-indent:1em" | 189m2Pt
 * colspan=3 style="text-indent:2em" | 191.6(4) keV
 * 143(5) μs
 * IT
 * 189Pt
 * (13/2+)
 * 190Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 112
 * 189.95994982(71)
 * 4.83(3)×1011 y
 * α
 * 186Os
 * 0+
 * 1.2(2)×10−4
 * 191Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 113
 * 190.9616763(44)
 * 2.83(2) d
 * EC
 * 191Ir
 * 3/2−
 * style="text-indent:1em" | 191m1Pt
 * colspan=3 style="text-indent:2em" | 100.663(20) keV
 * >1 μs
 * IT
 * 191Pt
 * 9/2−
 * style="text-indent:1em" | 191m2Pt
 * colspan=3 style="text-indent:2em" | 149.035(22) keV
 * 95(5) μs
 * IT
 * 191Pt
 * 13/2+
 * 192Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 114
 * 191.9610427(28)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.00782(24)
 * style="text-indent:1em" | 192mPt
 * colspan=3 style="text-indent:2em" | 2172.37(13) keV
 * 272(23) ns
 * IT
 * 192Pt
 * 10−
 * 193Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 115
 * 192.9629845(15)
 * 50(6) y
 * EC
 * 193Ir
 * 1/2−
 * style="text-indent:1em" | 193mPt
 * colspan=3 style="text-indent:2em" | 149.78(4) keV
 * 4.33(3) d
 * IT
 * 193Pt
 * 13/2+
 * 194Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 116
 * 193.96268350(53)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.3286(41)
 * 195Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 117
 * 194.96479433(54)
 * colspan=3 align=center|Observationally Stable
 * 1/2−
 * 0.3378(24)
 * style="text-indent:1em" | 195mPt
 * colspan=3 style="text-indent:2em" | 259.077(23) keV
 * 4.010(5) d
 * IT
 * 195Pt
 * 13/2+
 * 196Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 118
 * 195.96495465(55)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.2521(34)
 * 197Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 119
 * 196.96734303(58)
 * 19.8915(19) h
 * β−
 * 197Au
 * 1/2−
 * 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
 * 198Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 120
 * 197.9678967(23)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.0734(13)
 * 199Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 121
 * 198.9705970(23)
 * 30.80(21) min
 * β−
 * 199Au
 * 5/2−
 * style="text-indent:1em" | 199mPt
 * colspan=3 style="text-indent:2em" | 424(2) keV
 * 13.48(16) s
 * IT
 * 199Pt
 * 13/2+
 * 200Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 122
 * 199.971445(22)
 * 12.6(3) h
 * β−
 * 200Au
 * 0+
 * 201Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 123
 * 200.974513(54)
 * 2.5(1) min
 * β−
 * 201Au
 * (5/2−)
 * 202Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 124
 * 201.975639(27)
 * 44(15) h
 * β−
 * 202Au
 * 0+
 * style="text-indent:1em" | 202mPt
 * colspan=3 style="text-indent:2em" | 1788.5(4) keV
 * 141(7) μs
 * IT
 * 202Pt
 * (7−)
 * 203Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 125
 * 202.97906(22)#
 * 22(4) s
 * β−
 * 203Au
 * (1/2−)
 * 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
 * style="text-indent:1em" | 203m2Pt
 * colspan=3 style="text-indent:2em" | 1420(50)# keV
 * >100# ns
 * IT
 * 203Pt
 * 27/2−#
 * style="text-indent:1em" | 203m3Pt
 * colspan=3 style="text-indent:2em" | 2530(50)# keV
 * 641(55) ns
 * IT
 * 203Pt
 * 33/2+#
 * 204Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 126
 * 203.98108(22)#
 * 10.3(14) s
 * β−
 * 204Au
 * 0+
 * style="text-indent:1em" | 204m1Pt
 * colspan=3 style="text-indent:2em" | 1995.1(07) keV
 * 5.5(7) μs
 * IT
 * 204Pt
 * (5−)
 * style="text-indent:1em" | 204m2Pt
 * colspan=3 style="text-indent:2em" | 2035(23) keV
 * 55(3) μs
 * IT
 * 204Pt
 * (7−)
 * style="text-indent:1em" | 204m3Pt
 * colspan=3 style="text-indent:2em" | 3193(23) keV
 * 146(14) ns
 * IT
 * 204Pt
 * (10+)
 * 205Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 127
 * 204.98624(32)#
 * 2# s
 * β− ?
 * 205Au
 * 9/2+#
 * 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
 * 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
 * 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
 * 200Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 122
 * 199.971445(22)
 * 12.6(3) h
 * β−
 * 200Au
 * 0+
 * 201Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 123
 * 200.974513(54)
 * 2.5(1) min
 * β−
 * 201Au
 * (5/2−)
 * 202Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 124
 * 201.975639(27)
 * 44(15) h
 * β−
 * 202Au
 * 0+
 * style="text-indent:1em" | 202mPt
 * colspan=3 style="text-indent:2em" | 1788.5(4) keV
 * 141(7) μs
 * IT
 * 202Pt
 * (7−)
 * 203Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 125
 * 202.97906(22)#
 * 22(4) s
 * β−
 * 203Au
 * (1/2−)
 * 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
 * style="text-indent:1em" | 203m2Pt
 * colspan=3 style="text-indent:2em" | 1420(50)# keV
 * >100# ns
 * IT
 * 203Pt
 * 27/2−#
 * style="text-indent:1em" | 203m3Pt
 * colspan=3 style="text-indent:2em" | 2530(50)# keV
 * 641(55) ns
 * IT
 * 203Pt
 * 33/2+#
 * 204Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 126
 * 203.98108(22)#
 * 10.3(14) s
 * β−
 * 204Au
 * 0+
 * style="text-indent:1em" | 204m1Pt
 * colspan=3 style="text-indent:2em" | 1995.1(07) keV
 * 5.5(7) μs
 * IT
 * 204Pt
 * (5−)
 * style="text-indent:1em" | 204m2Pt
 * colspan=3 style="text-indent:2em" | 2035(23) keV
 * 55(3) μs
 * IT
 * 204Pt
 * (7−)
 * style="text-indent:1em" | 204m3Pt
 * colspan=3 style="text-indent:2em" | 3193(23) keV
 * 146(14) ns
 * IT
 * 204Pt
 * (10+)
 * 205Pt
 * style="text-align:right" | 78
 * style="text-align:right" | 127
 * 204.98624(32)#
 * 2# s
 * β− ?
 * 205Au
 * 9/2+#
 * 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
 * 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
 * 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
 * 205Au
 * 9/2+#
 * 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
 * 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
 * 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
 * β− ?
 * 208Au
 * rowspan=2 | 0+
 * rowspan=2 |
 * rowspan=2 |
 * β−n ?
 * 207Au
 * 207Au