鉑的同位素
圖表

| 符號 | Z> 激發能量 | N> 激發能量 | 同位素質量（u） > 激發能量 | 半衰期 | 衰變方式 | 衰變產物 | 原子核 自旋 | 相對豐度 （莫耳分率） | 相對豐度 的變化量 （莫耳分率） |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 165Pt | 78 | 87 |  | 6996259999999999999♠260+260 −90 µs | α | 161Os |  |  |  |
| 166Pt | 78 | 88 | 165.99486(54)# | 6996259999999999999♠260+300 −60 µs | α | 162Os | 0+ |  |  |
| 167Pt | 78 | 89 | 166.99298(44)# | 1.1(2) ms | α | 163Os | 7/2−# |  |  |
| 168Pt | 78 | 90 | 167.98815(22) | 2.00(18) ms | α | 164Os | 0+ |  |  |
| 168Pt | 78 | 90 | 167.98815(22) | 2.00(18) ms | β+ （不常見） | 168Ir | 0+ |  |  |
| 169Pt | 78 | 91 | 168.98672(22)# | 3.7(15) ms | α | 165Os | 3/2−# |  |  |
| 169Pt | 78 | 91 | 168.98672(22)# | 3.7(15) ms | β+ （不常見） | 169Ir | 3/2−# |  |  |
| 170Pt | 78 | 92 | 169.982495(20) | 14.0(2) ms | α (98%) | 166Os | 0+ |  |  |
| 170Pt | 78 | 92 | 169.982495(20) | 14.0(2) ms | β+ (2%) | 170Ir | 0+ |  |  |
| 171Pt | 78 | 93 | 170.98124(9) | 51(2) ms | α (99%) | 167Os | 3/2−# |  |  |
| 171Pt | 78 | 93 | 170.98124(9) | 51(2) ms | β+ (1%) | 171Ir | 3/2−# |  |  |
| 172Pt | 78 | 94 | 171.977347(14) | 98.4(24) ms | α (77%) | 168Os | 0+ |  |  |
| 172Pt | 78 | 94 | 171.977347(14) | 98.4(24) ms | β+ (23%) | 172Ir | 0+ |  |  |
| 173Pt | 78 | 95 | 172.97644(6) | 365(7) ms | α (84%) | 169Os | 5/2−# |  |  |
| 173Pt | 78 | 95 | 172.97644(6) | 365(7) ms | β+ (16%) | 173Ir | 5/2−# |  |  |
| 174Pt | 78 | 96 | 173.972819(13) | 0.889(17) s | α (83%) | 170Os | 0+ |  |  |
| 174Pt | 78 | 96 | 173.972819(13) | 0.889(17) s | β+ (17%) | 174Ir | 0+ |  |  |
| 175Pt | 78 | 97 | 174.972421(20) | 2.53(6) s | α (64%) | 171Os | 5/2−# |  |  |
| 175Pt | 78 | 97 | 174.972421(20) | 2.53(6) s | β+ (36%) | 175Ir | 5/2−# |  |  |
| 176Pt | 78 | 98 | 175.968945(15) | 6.33(15) s | β+ (62%) | 176Ir | 0+ |  |  |
| 176Pt | 78 | 98 | 175.968945(15) | 6.33(15) s | α (38%) | 172Os | 0+ |  |  |
| 177Pt | 78 | 99 | 176.968469(16) | 10.6(4) s | β+ (94.4%) | 177Ir | 5/2− |  |  |
| 177Pt | 78 | 99 | 176.968469(16) | 10.6(4) s | α (5.6%) | 173Os | 5/2− |  |  |
| 177mPt | 147.4(4) keV | 147.4(4) keV | 147.4(4) keV | 2.2(3) µs |  |  | 1/2− |  |  |
| 178Pt | 78 | 100 | 177.965649(12) | 21.1(6) s | β+ (92.3%) | 178Ir | 0+ |  |  |
| 178Pt | 78 | 100 | 177.965649(12) | 21.1(6) s | α (7.7%) | 174Os | 0+ |  |  |
| 179Pt | 78 | 101 | 178.965363(10) | 21.2(4) s | β+ (99.76%) | 179Ir | 1/2− |  |  |
| 179Pt | 78 | 101 | 178.965363(10) | 21.2(4) s | α (0.24%) | 175Os | 1/2− |  |  |
| 180Pt | 78 | 102 | 179.963031(12) | 56(2) s | β+ (99.7%) | 180Ir | 0+ |  |  |
| 180Pt | 78 | 102 | 179.963031(12) | 56(2) s | α (0.3%) | 176Os | 0+ |  |  |
| 181Pt | 78 | 103 | 180.963097(16) | 52.0(22) s | β+ (99.93%) | 181Ir | 1/2− |  |  |
| 181Pt | 78 | 103 | 180.963097(16) | 52.0(22) s | α (0.074%) | 177Os | 1/2− |  |  |
| 182Pt | 78 | 104 | 181.961171(17) | 2.2(1) min | β+ (99.96%) | 182Ir | 0+ |  |  |
| 182Pt | 78 | 104 | 181.961171(17) | 2.2(1) min | α (.038%) | 178Os | 0+ |  |  |
| 183Pt | 78 | 105 | 182.961597(17) | 6.5(10) min | β+ (99.99%) | 183Ir | 1/2− |  |  |
| 183Pt | 78 | 105 | 182.961597(17) | 6.5(10) min | α (.0096%) | 179Os | 1/2− |  |  |
| 183m1Pt | 34.50(8) keV | 34.50(8) keV | 34.50(8) keV | 43(5) s | β+ (99.99%) | 183Ir | (7/2)− |  |  |
| 183m1Pt | 34.50(8) keV | 34.50(8) keV | 34.50(8) keV | 43(5) s | α (4×10−4%) | 179Os | (7/2)− |  |  |
| 183m1Pt | 34.50(8) keV | 34.50(8) keV | 34.50(8) keV | 43(5) s | IT | 183Pt | (7/2)− |  |  |
| 183m2Pt | 195.68(11) keV | 195.68(11) keV | 195.68(11) keV | >150 ns |  |  | (9/2)+ |  |  |
| 184Pt | 78 | 106 | 183.959922(19) | 17.3(2) min | β+ (99.99%) | 184Ir | 0+ |  |  |
| 184Pt | 78 | 106 | 183.959922(19) | 17.3(2) min | α (.00169%) | 180Os | 0+ |  |  |
| 184mPt | 1839.4(16) keV | 1839.4(16) keV | 1839.4(16) keV | 1.01(5) ms | IT | 184Pt | 8− |  |  |
| 185Pt | 78 | 107 | 184.96062(4) | 70.9(24) min | β+ (99.99%) | 185Ir | (9/2+) |  |  |
| 185Pt | 78 | 107 | 184.96062(4) | 70.9(24) min | α (.005%) | 181Os | (9/2+) |  |  |
| 185mPt | 103.4(2) keV | 103.4(2) keV | 103.4(2) keV | 33.0(8) min | β+ (98%) | 185Ir | (1/2−) |  |  |
| 185mPt | 103.4(2) keV | 103.4(2) keV | 103.4(2) keV | 33.0(8) min | α (2%) | 181Os | (1/2−) |  |  |
| 186Pt | 78 | 108 | 185.959351(23) | 2.08(5) h | β+ (99.99%) | 186Ir | 0+ |  |  |
| 186Pt | 78 | 108 | 185.959351(23) | 2.08(5) h | α (1.4×10−4%) | 182Os | 0+ |  |  |
| 187Pt | 78 | 109 | 186.96059(3) | 2.35(3) h | β+ | 187Ir | 3/2− |  |  |
| 188Pt | 78 | 110 | 187.959395(6) | 10.2(3) d | ε (99.99%) | 188Ir | 0+ |  |  |
| 188Pt | 78 | 110 | 187.959395(6) | 10.2(3) d | α (2.6×10−5%) | 184Os | 0+ |  |  |
| 189Pt | 78 | 111 | 188.960834(12) | 10.87(12) h | β+ | 189Ir | 3/2− |  |  |
| 189m1Pt | 172.80(6) keV | 172.80(6) keV | 172.80(6) keV | 464(25) ns |  |  | 9/2− |  |  |
| 189m2Pt | 191.6(4) keV | 191.6(4) keV | 191.6(4) keV | 143(5) µs |  |  | (13/2+) |  |  |
| 190Pt | 78 | 112 | 189.959932(6) | 4.97(16)×1011 y | α | 186Os | 0+ | 1.4(1)×10−4 |  |
| 191Pt | 78 | 113 | 190.961677(5) | 2.862(7) d | ε | 191Ir | 3/2− |  |  |
| 191m1Pt | 100.67(2) keV | 100.67(2) keV | 100.67(2) keV | >1 µs |  |  | (9/2)− |  |  |
| 191m2Pt | 149.04(2) keV | 149.04(2) keV | 149.04(2) keV | 95(5) µs |  |  | (13/2)+ |  |  |
| 192Pt | 78 | 114 | 191.9610380(27) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 0+ | 0.00782(7) |  |
| 193Pt | 78 | 115 | 192.9629874(18) | 50(6) y | ε | 193Ir | 1/2− |  |  |
| 193mPt | 149.78(4) keV | 149.78(4) keV | 149.78(4) keV | 4.33(3) d | IT | 193Pt | 13/2+ |  |  |
| 194Pt | 78 | 116 | 193.9626803(9) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 0+ | 0.32967(99) |  |
| 195Pt | 78 | 117 | 194.9647911(9) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 1/2− | 0.33832(10) |  |
| 195mPt | 259.30(8) keV | 259.30(8) keV | 259.30(8) keV | 4.010(5) d | IT | 195Pt | 13/2+ |  |  |
| 196Pt | 78 | 118 | 195.9649515(9) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 0+ | 0.25242(41) |  |
| 197Pt | 78 | 119 | 196.9673402(9) | 19.8915(19) h | β− | 197Au | 1/2− |  |  |
| 197mPt | 399.59(20) keV | 399.59(20) keV | 399.59(20) keV | 95.41(18) min | IT (96.7%) | 197Pt | 13/2+ |  |  |
| 197mPt | 399.59(20) keV | 399.59(20) keV | 399.59(20) keV | 95.41(18) min | β− (3.3%) | 197Au | 13/2+ |  |  |
| 198Pt | 78 | 120 | 197.967893(3) | 觀測上穩定 | 觀測上穩定 | 觀測上穩定 | 0+ | 0.07163(55) |  |
| 199Pt | 78 | 121 | 198.970593(3) | 30.80(21) min | β− | 199Au | 5/2− |  |  |
| 199mPt | 424(2) keV | 424(2) keV | 424(2) keV | 13.6(4) s | IT | 199Pt | (13/2)+ |  |  |
| 200Pt | 78 | 122 | 199.971441(22) | 12.5(3) h | β− | 200Au | 0+ |  |  |
| 201Pt | 78 | 123 | 200.97451(5) | 2.5(1) min | β− | 201Au | (5/2−) |  |  |
| 202Pt | 78 | 124 | 201.97574(32)# | 44(15) h | β− | 202Au | 0+ |  |  |
1 2  畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
1 2 3 4  用括號括起來的數據代表不確定性。
↑  半衰期超过5亿年的同位素以粗體表示。
↑  穩定的衰變產物以粗體表示。
↑  半衰期超过5亿年的衰变产物以粗斜体表示。
↑  Believed to undergo α decay to 188Os with a half-life over 470×1015 years
↑  Believed to undergo α decay to 190Os
↑  Believed to undergo α decay to 191Os
↑  Believed to undergo α decay to 192Os
↑  Believed to undergo α decay to 194Os or double β− decay to 198Hg with a half-life over 320×1012 years
| 0 | 1 | 2 |
| --- | --- | --- |

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