Isotopes of platinum

{{Short description|none}} {{Infobox platinum isotopes}} Naturally occurring platinum (₇₈Pt) consists of five stable isotopes (¹⁹²Pt, ¹⁹⁴Pt, ¹⁹⁵Pt, ¹⁹⁶Pt, ¹⁹⁸Pt) and one long-lived (half-life 4.83×10¹¹ years) radioisotope (¹⁹⁰Pt). There are also 34 known synthetic radioisotopes ranging from ¹⁶⁵Pt to ²⁰⁴Pt, and longest-lived of those is ¹⁹³Pt with a half-life of 50 years. All the others have half-lives under two weeks, most under a day. There are numerous metastable states, of which the most stable are ^193mPt and ^195mPt with half-lives 4.33 and 4.010 days, decaying to their ground states.

Despite the obstacles to measurement with rare isotopes of rare elements, with a very slow decay, the ¹⁹⁰Pt/¹⁸⁶Os system has been used in isotope geology, though not directly for dating.<ref>{{cite journal |last1=Walker |first1=Richard J. |last2=Morgan |first2=John W. |last3=Beary |first3=Ellyn S. |last4=Smoliar |first4=Michael I. |last5=Czamanske |first5=Gerald K. |last6=Horan |first6=Mary F. |date=1997 |title=Applications of the ¹⁹⁰Pt ¹⁸⁶Os isotope system to geochemistry and cosmochemistry |url=https://doi.org/10.1016/S0016-7037(97)00270-6 |journal=Geochimica et Cosmochimica Acta |volume=61 |issue=22 |pages=4799–4807 |doi=10.1016/S0016-7037(97)00270-6|bibcode=1997GeCoA..61.4799W |url-access=subscription }}</ref>

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, making platinum one of the only three elements to have its most abundant isotope with an odd neutron number (the other two being beryllium and nitrogen); however, it is so only by a small margin, unlike the other two, and is more in the nature of a coincidence.

== List of isotopes == {{Anchor|Platinum-201m}}

<!--Please delete anchor(s) from the list above or table below if adding a dedicated isotope section(s).-->

{{Isotopes table |symbol=Pt |refs=NUBASE2020, AME2020 II, IsotopeFRIB, IsomerFRIB |notes=m, unc(), mass#, exen#, hl-nst, spin(), spin#, daughter-st, daughter-nst, IT, EC, discoveryname }} |-id=Platinum-165 | ¹⁶⁵Pt | style="text-align:right" | 78 | style="text-align:right" | 87 | 164.99966(43)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/165.pdf 2019] | 370(180)&nbsp;μs | α | ¹⁶¹Os | 7/2−# | | |-id=Platinum-166 | ¹⁶⁶Pt | style="text-align:right" | 78 | style="text-align:right" | 88 | 165.99487(32)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/166.pdf 1996] | 294(62)&nbsp;μs | α | ¹⁶²Os | 0+ | | |-id=Platinum-167 | ¹⁶⁷Pt | style="text-align:right" | 78 | style="text-align:right" | 89 | 166.99275(33)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/167.pdf 1996] | 920(120)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/168.pdf 1981] | rowspan=2|2.02(10)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/169.pdf 1981] | rowspan=2|6.99(9)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/170.pdf 1981] | rowspan=2|13.93(16)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/171.pdf 1981] | rowspan=2|45.5(25)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/171Pt-1.pdf 2010] | 901(9)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/172.pdf 1981] | rowspan=2|97.6(13)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/173.pdf 1966] | rowspan=2|382(2)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/174.pdf 1966] | rowspan=2|862(8)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/175.pdf 1966] | rowspan=2|2.43(4)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/176.pdf 1966] | rowspan=2|6.33(15)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/177.pdf 1966] | rowspan=2|10.0(04)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/177Pt-1.pdf 1979] | 2.35(4)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/178.pdf 1966] | rowspan=2|20.7(7)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/179.pdf 1966] | rowspan=2|21.2(4)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/180.pdf 1966] | rowspan=2|56(3)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/181.pdf 1966] | rowspan=2|52.0(22)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/181Pt-1.pdf 1976] | >300&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/182.pdf 1963] | rowspan=2|2.67(12)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/183.pdf 1963] | rowspan=2|6.5(10)&nbsp;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)&nbsp;keV | rowspan=3 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/183Pt-1.pdf 1979] | rowspan=3|43(5)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/183Pt-2.pdf 1984] | >150&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/184.pdf 1963] | rowspan=2|17.3(2)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/184Pt-1.pdf 1966] | 1.01(5)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/185.pdf 1960] | rowspan=2|70.9(24)&nbsp;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)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/185Pt-1.pdf 1979] | 33.0(8)&nbsp;min | β⁺ | ¹⁸⁵Ir | 1/2− | | |-id=Platinum-185m2 | style="text-indent:1em" | ^185m2Pt | colspan=3 style="text-indent:2em" | 200.89(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/185Pt-2.pdf 1996] | 728(20)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/186.pdf 1960] | rowspan=2|2.08(5)&nbsp;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) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/187.pdf 1960] | 2.35(3)&nbsp;h | β⁺ | ¹⁸⁷Ir | 3/2− | | |-id=Platinum-187m | style="text-indent:1em" | ^187mPt | colspan=3 style="text-indent:2em" | 174.38(22)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/187Pt-1.pdf 1976] | 311(15)&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/188.pdf 1954] | rowspan=2|10.16(18)&nbsp;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) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/189.pdf 1955] | 10.87(12)&nbsp;h | β⁺ | ¹⁸⁹Ir | 3/2− | | |-id=Platinum-189m1 | style="text-indent:1em" | ^189m1Pt | colspan=3 style="text-indent:2em" | 172.79(6)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/189Pt-1.pdf 1969] | 464(25)&nbsp;ns | IT | ¹⁸⁹Pt | 9/2− | | |-id=Platinum-189m2 | style="text-indent:1em" | ^189m2Pt | colspan=3 style="text-indent:2em" | 191.6(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/189Pt-2.pdf 1976] | 143(5)&nbsp;μs | IT | ¹⁸⁹Pt | (13/2+) | | |-id=Platinum-190 | ¹⁹⁰Pt | style="text-align:right" | 78 | style="text-align:right" | 112 | 189.95994982(71) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/190.pdf 1949] | '''4.83(3)×10¹¹&nbsp;y''' | α<ref group="n">Theorized to also undergo β⁺β⁺ decay to '''¹⁹⁰Os'''</ref> | '''''¹⁸⁶Os''''' | 0+ | 1.2(2)×10⁻⁴ | |-id=Platinum-191 | ¹⁹¹Pt | style="text-align:right" | 78 | style="text-align:right" | 113 | 190.9616763(44) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/191.pdf 1948] | 2.83(2)&nbsp;d | EC | '''¹⁹¹Ir''' | 3/2− | | |-id=Platinum-191m1 | style="text-indent:1em" | ^191m1Pt | colspan=3 style="text-indent:2em" | 100.663(20)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/191Pt-2.pdf 1976] | >1&nbsp;μs | IT | ¹⁹¹Pt | 9/2− | | |-id=Platinum-191m2 | style="text-indent:1em" | ^191m2Pt | colspan=3 style="text-indent:2em" | 149.035(22)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/191Pt-1.pdf 1967] | 95(5)&nbsp;μs | IT | ¹⁹¹Pt | 13/2+ | | |-id=Platinum-192 | ¹⁹²Pt | style="text-align:right" | 78 | style="text-align:right" | 114 | 191.9610427(28) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/192.pdf 1935] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁸⁸Os''' with a half-life over 6.0×10¹⁶ years</ref> | 0+ | 0.00782(24) | |-id=Platinum-192m | style="text-indent:1em" | ^192mPt | colspan=3 style="text-indent:2em" | 2172.37(13)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/192Pt-1.pdf 1976] | 272(23)&nbsp;ns | IT | ¹⁹²Pt | 10− | | |-id=Platinum-193 | ¹⁹³Pt | style="text-align:right" | 78 | style="text-align:right" | 115 | 192.9629845(15) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/193.pdf 1948] | 50(6)&nbsp;y | EC | '''¹⁹³Ir''' | 1/2− | | |-id=Platinum-193m | style="text-indent:1em" | ^193mPt | colspan=3 style="text-indent:2em" | 149.78(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/193Pt-1.pdf 1949] | 4.33(3)&nbsp;d | IT | ¹⁹³Pt | 13/2+ | | |-id=Platinum-194 | ¹⁹⁴Pt | style="text-align:right" | 78 | style="text-align:right" | 116 | 193.96268350(53) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/194.pdf 1935] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁹⁰Os'''</ref> | 0+ | 0.3286(41) | |-id=Platinum-195 | ¹⁹⁵Pt | style="text-align:right" | 78 | style="text-align:right" | 117 | 194.96479433(54) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/195.pdf 1935] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to ¹⁹¹Os with a half-life over 6.3×10¹⁸ years</ref> | 1/2− | 0.3378(24) | |-id=Platinum-195m | style="text-indent:1em" | ^195mPt | colspan=3 style="text-indent:2em" | 259.077(23)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/195Pt-1.pdf 1952] | 4.010(5)&nbsp;d | IT | '''¹⁹⁵Pt''' | 13/2+ | | |-id=Platinum-196 | ¹⁹⁶Pt | style="text-align:right" | 78 | style="text-align:right" | 118 | 195.96495465(55) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/196.pdf 1935] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to '''¹⁹²Os'''</ref> | 0+ | 0.2521(34) | |-id=Platinum-197 | ¹⁹⁷Pt | style="text-align:right" | 78 | style="text-align:right" | 119 | 196.96734303(58) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/197.pdf 1936] | 19.8915(19)&nbsp;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)&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/197Pt-1.pdf 1952] | rowspan=2|95.41(18)&nbsp;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) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/198.pdf 1935] | colspan=3 align=center|'''Observationally Stable'''<ref group="n">Believed to undergo α decay to ¹⁹⁴Os or double β⁻ decay to '''¹⁹⁸Hg''' with a half-life over 3.20×10¹⁴ years</ref> | 0+ | 0.0734(13) | |-id=Platinum-199 | ¹⁹⁹Pt | style="text-align:right" | 78 | style="text-align:right" | 121 | 198.9705970(23) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/199.pdf 1937] | 30.80(21)&nbsp;min | β⁻ | ¹⁹⁹Au | 5/2− | | |-id=Platinum-199m | style="text-indent:1em" | ^199mPt | colspan=3 style="text-indent:2em" | 424(2)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/199Pt-1.pdf 1959] | 13.48(16)&nbsp;s | IT | ¹⁹⁹Pt | 13/2+ | | |-id=Platinum-200 | ²⁰⁰Pt | style="text-align:right" | 78 | style="text-align:right" | 122 | 199.971445(22) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/200.pdf 1957] | 12.6(3)&nbsp;h | β⁻ | ²⁰⁰Au | 0+ | | |-id=Platinum-201 | ²⁰¹Pt | style="text-align:right" | 78 | style="text-align:right" | 123 | 200.974513(54) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/201.pdf 1962] | 2.5(1)&nbsp;min | β⁻ | ²⁰¹Au | (5/2−) | | |-id=Platinum-202 | ²⁰²Pt | style="text-align:right" | 78 | style="text-align:right" | 124 | 201.975639(27) | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/202.pdf 1992] | 44(15)&nbsp;h | β⁻ | ²⁰²Au | 0+ | | |-id=Platinum-202m | style="text-indent:1em" | ^202mPt | colspan=3 style="text-indent:2em" | 1788.5(4)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/202Pt-1.pdf 2005] | 141(7)&nbsp;μs | IT | ²⁰²Pt | (7−) | | |-id=Platinum-203 | ²⁰³Pt | style="text-align:right" | 78 | style="text-align:right" | 125 | 202.97906(22)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/203.pdf 2008] | 22(4)&nbsp;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)#&nbsp;keV | rowspan=2 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/203Pt-2.pdf 2013] | rowspan=2 | 12(5)&nbsp;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)#&nbsp;keV | style="text-align:center" | (2008)<ref group="n"> Half-life not measured, not included in discovery database </ref> | >100#&nbsp;ns | IT | ²⁰³Pt | 27/2−# | | |-id=Platinum-203m3 | style="text-indent:1em" | ^203m3Pt | colspan=3 style="text-indent:2em" | 2530(50)#&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/203Pt-1.pdf 2011] | 641(55)&nbsp;ns | IT | ²⁰³Pt | 33/2+# | | |-id=Platinum-204 | ²⁰⁴Pt | style="text-align:right" | 78 | style="text-align:right" | 126 | 203.98108(22)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/204.pdf 2008] | 10.3(14)&nbsp;s | β⁻ | ²⁰⁴Au | 0+ | | |-id=Platinum-204m1 | style="text-indent:1em" | ^204m1Pt | colspan=3 style="text-indent:2em" | 1995.1(07)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/204Pt-2.pdf 2008] | 5.5(7)&nbsp;μs | IT | ²⁰⁴Pt | (5−) | | |-id=Platinum-204m2 | style="text-indent:1em" | ^204m2Pt | colspan=3 style="text-indent:2em" | 2035(23)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/204Pt-1.pdf 2008] | 55(3)&nbsp;μs | IT | ²⁰⁴Pt | (7−) | | |-id=Platinum-204m3 | style="text-indent:1em" | ^204m3Pt | colspan=3 style="text-indent:2em" | 3193(23)&nbsp;keV | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/isomers/abstracts/78/204Pt-3.pdf 2008] | 146(14)&nbsp;ns | IT | ²⁰⁴Pt | (10+) | | |-id=Platinum-205 | ²⁰⁵Pt | style="text-align:right" | 78 | style="text-align:right" | 127 | 204.98624(32)# | style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/205.pdf 2010] | 2#&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/206.pdf 2012] | rowspan=2 | 500#&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/207.pdf 2012] | rowspan=2 | 600#&nbsp;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 style="text-align:center" | [https://www.nndc.bnl.gov/discovery/abstracts/78/208.pdf 2012] | rowspan=2 | 220#&nbsp;ms | β⁻ ? | ²⁰⁸Au | rowspan=2 | 0+ | rowspan=2 | | rowspan=2 | |- | β⁻n ? | ²⁰⁷Au {{Isotopes table/footer}}

== See also == '''Daughter products other than platinum''' * Isotopes of gold * Isotopes of iridium * Isotopes of osmium

== References == {{Reflist}} * Isotope masses from: **{{NUBASE 2003}} * Isotopic compositions and standard atomic masses from: **{{CIAAW2003}} **{{CIAAW 2005}} * Half-life, spin, and isomer data selected from the following sources. **{{NUBASE 2003}} **{{NNDC}} **{{CRC85|chapter=11}}

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Category:Isotopes of platinum Category:Platinum Platinum