# Isotopen van platina

Het chemisch element platina (Pt), met een atoommassa van 195,084(9) u, bezit 5 stabiele isotopen: $^{192}$Pt, $^{194}$Pt, $^{195}$Pt, $^{196}$Pt en $^{198}$Pt, waarvan $^{195}$Pt het meest abundant is (ongeveer 33,8%). Daarnaast komt in de natuur ook de radio-isotoop $^{190}$Pt voor, die een halfwaardetijd van 650 miljard jaar bezit. De overige 30 radio-isotopen zijn onstabiel en hebben een relatief korte halfwaardetijd (de meeste minder dan een seconde).
De kortstlevende isotoop van platina is $^{166}$Pt, met een halfwaardetijd van ongeveer 300 microseconden. De langstlevende is $^{190}$Pt, met een halfwaardetijd van 650 miljard jaar.

## Overzicht

| Nuclide | Z (p) | N (n) | Isotopische massa (u) | Halveringstijd | Radioactief verval | VP | Kernspin | Isotopische verhouding (molfractie) |
| Natuurlijk voorkomen (molfractie) |||
| $^{166}$Pt | 78 | 88 | 165,99486(54) | 300(100) µs | | | 0$^+$ | |
| $^{167}$Pt | 78 | 89 | 166,99298(44) | 700(200) µs | | | 7/2$^−$ | |
| $^{168}$Pt | 78 | 90 | 167,98815(22) | 2,00(18) ms | α | $^{164}$Os | 0$^+$ | |
| $^{168}$Pt | 78 | 90 | 167,98815(22) | 2,00(18) ms | β$^+$ (zelden) | $^{168}$Ir | 0$^+$ | |
| $^{169}$Pt | 78 | 91 | 168,98672(22) | 3,7(15) ms | α | $^{165}$Os | 3/2- | |
| $^{169}$Pt | 78 | 91 | 168,98672(22) | 3,7(15) ms | β$^+$ (zelden) | $^{169}$Ir | 3/2- | |
| $^{170}$Pt | 78 | 92 | 169,982495(20) | 14,0(2) ms | α (98%) | $^{166}$Os | 0$^+$ | |
| $^{170}$Pt | 78 | 92 | 169,982495(20) | 14,0(2) ms | β$^+$ (2%) | $^{170}$Ir | 0$^+$ | |
| $^{171}$Pt | 78 | 93 | 170,98124(9) | 51(2) ms | α (99%) | $^{167}$Os | 3/2$^−$ | |
| $^{171}$Pt | 78 | 93 | 170,98124(9) | 51(2) ms | β$^+$ (1%) | $^{171}$Ir | 3/2$^−$ | |
| $^{172}$Pt | 78 | 94 | 171,977347(14) | 98,4(24) ms | α (77%) | $^{168}$Os | 0$^+$ | |
| $^{172}$Pt | 78 | 94 | 171,977347(14) | 98,4(24) ms | β$^+$ (23%) | $^{172}$Ir | 0$^+$ | |
| $^{173}$Pt | 78 | 95 | 172,97644(6) | 365(7) ms | α (84%) | $^{169}$Os | 5/2$^−$ | |
| $^{173}$Pt | 78 | 95 | 172,97644(6) | 365(7) ms | β$^+$ (16%) | $^{173}$Ir | 5/2$^−$ | |
| $^{174}$Pt | 78 | 96 | 173,972819(13) | 0,889(17) s | α (83%) | $^{170}$Os | 0$^+$ | |
| $^{174}$Pt | 78 | 96 | 173,972819(13) | 0,889(17) s | β$^+$ (17%) | $^{174}$Ir | 0$^+$ | |
| $^{175}$Pt | 78 | 97 | 174,972421(20) | 2,53(6) s | α (64%) | $^{171}$Os | 5/2$^−$ | |
| $^{175}$Pt | 78 | 97 | 174,972421(20) | 2,53(6) s | β$^+$ (36%) | $^{175}$Ir | 5/2$^−$ | |
| $^{176}$Pt | 78 | 98 | 175,968945(15) | 6,33(15) s | β$^+$ (62%) | $^{176}$Ir | 0$^+$ | |
| $^{176}$Pt | 78 | 98 | 175,968945(15) | 6,33(15) s | α (38%) | $^{172}$Os | 0$^+$ | |
| $^{177}$Pt | 78 | 99 | 176,968469(16) | 10,6(4) s | β$^+$ (94,4%) | $^{177}$Ir | 5/2$^−$ | |
| $^{177}$Pt | 78 | 99 | 176,968469(16) | 10,6(4) s | α (5,6%) | $^{173}$Os | 5/2$^−$ | |
| $^{177m}$Pt | 147,4(4) keV | 147,4(4) keV | 147,4(4) keV | 2,2(3) µs | | | 1/2$^−$ | |
| $^{178}$Pt | 78 | 100 | 177,965649(12) | 21,1(6) s | β$^+$ (92,3%) | $^{178}$Ir | 0$^+$ | |
| $^{178}$Pt | 78 | 100 | 177,965649(12) | 21,1(6) s | α (7,7%) | $^{174}$Os | 0$^+$ | |
| $^{179}$Pt | 78 | 101 | 178,965363(10) | 21,2(4) s | β$^+$ (99,76%) | $^{179}$Ir | 1/2$^−$ | |
| $^{179}$Pt | 78 | 101 | 178,965363(10) | 21,2(4) s | α (0,24%) | $^{175}$Os | 1/2$^−$ | |
| $^{180}$Pt | 78 | 102 | 179,963031(12) | 56(2) s | β$^+$ (99,7%) | $^{180}$Ir | 0$^+$ | |
| $^{180}$Pt | 78 | 102 | 179,963031(12) | 56(2) s | α (0,3%) | $^{176}$Os | 0$^+$ | |
| $^{181}$Pt | 78 | 103 | 180,963097(16) | 52,0(22) s | β$^+$ (99,93%) | $^{181}$Ir | 1/2$^−$ | |
| $^{181}$Pt | 78 | 103 | 180,963097(16) | 52,0(22) s | α (0,074%) | $^{177}$Os | 1/2$^−$ | |
| $^{182}$Pt | 78 | 104 | 181,961171(17) | 2,2(1) min | β$^+$ (99,96%) | $^{182}$Ir | 0$^+$ | |
| $^{182}$Pt | 78 | 104 | 181,961171(17) | 2,2(1) min | α (0,038%) | $^{178}$Os | 0$^+$ | |
| $^{183}$Pt | 78 | 105 | 182,961597(17) | 6,5(10) min | β$^+$ (99,99%) | $^{183}$Ir | 1/2$^−$ | |
| $^{183}$Pt | 78 | 105 | 182,961597(17) | 6,5(10) min | α (0,0096%) | $^{179}$Os | 1/2$^−$ | |
| $^{183m1}$Pt | 34,50(8) keV | 34,50(8) keV | 34,50(8) keV | 43(5) s | β$^+$ (99,99%) | $^{183}$Ir | 7/2$^−$ | |
| $^{183m1}$Pt | 34,50(8) keV | 34,50(8) keV | 34,50(8) keV | 43(5) s | α (4 × 10$^{−4}$%) | $^{179}$Os | 7/2$^−$ | |
| $^{183m1}$Pt | 34,50(8) keV | 34,50(8) keV | 34,50(8) keV | 43(5) s | IT | $^{183}$Pt | 7/2$^−$ | |
| $^{183m2}$Pt | 195,68(11) keV | 195,68(11) keV | 195,68(11) keV | > 150 ns | | | 9/2$^+$ | |
| $^{184}$Pt | 78 | 106 | 183,959922(19) | 17,3(2) min | β$^+$ (99,99%) | $^{184}$Ir | 0$^+$ | |
| $^{184}$Pt | 78 | 106 | 183,959922(19) | 17,3(2) min | α (0,00169%) | $^{180}$Os | 0$^+$ | |
| $^{184m}$Pt | 1839,4(16) keV | 1839,4(16) keV | 1839,4(16) keV | 1,01(5) ms | IT | $^{184}$Pt | 8$^−$ | |
| $^{185}$Pt | 78 | 107 | 184,96062(4) | 70,9(24) min | β$^+$ (99,99%) | $^{185}$Ir | (9/2$^+$) | |
| $^{185}$Pt | 78 | 107 | 184,96062(4) | 70,9(24) min | α (0,005%) | $^{181}$Os | (9/2$^+$) | |
| $^{185m}$Pt | 103,4(2) keV | 103,4(2) keV | 103,4(2) keV | 33,0(8) min | β$^+$ (98%) | $^{185}$Ir | (1/2$^−$) | |
| $^{185m}$Pt | 103,4(2) keV | 103,4(2) keV | 103,4(2) keV | 33,0(8) min | α (2%) | $^{181}$Os | (1/2$^−$) | |
| $^{186}$Pt | 78 | 108 | 185,959351(23) | 2,08(5) uur | β$^+$ (99,99%) | $^{186}$Ir | 0$^+$ | |
| $^{186}$Pt | 78 | 108 | 185,959351(23) | 2,08(5) uur | α (1,4 × 10$^{−4}$%) | $^{182}$Os | 0$^+$ | |
| $^{187}$Pt | 78 | 109 | 186,96059(3) | 2,35(3) uur | β$^+$ | $^{187}$Ir | 3/2$^−$ | |
| $^{188}$Pt | 78 | 110 | 187,959395(6) | 10,2(3) d | EV (99,99%) | $^{188}$Ir | 0$^+$ | |
| $^{188}$Pt | 78 | 110 | 187,959395(6) | 10,2(3) d | α (2,6 × 10$^{−5}$%) | $^{184}$Os | 0$^+$ | |
| $^{189}$Pt | 78 | 111 | 188,960834(12) | 10,87(12) uur | β$^+$ | $^{189}$Ir | 3/2$^−$ | |
| $^{189m1}$Pt | 172,80(6) keV | 172,80(6) keV | 172,80(6) keV | 464(25) ns | | | 9/2$^−$ | |
| $^{189m2}$Pt | 191,6(4) keV | 191,6(4) keV | 191,6(4) keV | 143(5) µs | | | (13/2$^+$) | |
| $^{190}$Pt | 78 | 112 | 189,959932(6) | 6,5(3) × 10$^{11}$ jaar | α | $^{186}$Os | 0$^+$ | 1,4(1) × 10$^{−4}$ |
| $^{191}$Pt | 78 | 113 | 190,961677(5) | 2,862(7) dagen | EV | $^{191}$Ir | 3/2$^−$ | |
| $^{191m1}$Pt | 100,67(2) keV | 100,67(2) keV | 100,67(2) keV | > 1 µs | | | 9/2$^−$ | |
| $^{191m2}$Pt | 149,04(2) keV | 149,04(2) keV | 149,04(2) keV | 95(5) µs | | | 13/2$^+$ | |
| $^{192}$Pt | 78 | 114 | 191,9610380(27) | stabiel | stabiel | stabiel | 0$^+$ | 0,00782(7) |
| $^{193}$Pt | 78 | 115 | 192,9629874(18) | 50(6) jaar | EV | $^{193}$Ir | 1/2$^−$ | |
| $^{193m}$Pt | 149,78(4) keV | 149,78(4) keV | 149,78(4) keV | 4,33(3) dagen | IT | $^{193}$Pt | 13/2$^+$ | |
| $^{194}$Pt | 78 | 116 | 193,9626803(9) | stabiel | stabiel | stabiel | 0$^+$ | 0,32967(99) |
| $^{195}$Pt | 78 | 117 | 194,9647911(9) | stabiel | stabiel | stabiel | 1/2$^−$ | 0,33832(10) |
| $^{195m}$Pt | 259,30(8) keV | 259,30(8) keV | 259,30(8) keV | 4,010(5) dagen | IT | $^{195}$Pt | 13/2$^+$ | |
| $^{196}$Pt | 78 | 118 | 195,9649515(9) | stabiel | stabiel | stabiel | 0$^+$ | 0,25242(41) |
| $^{197}$Pt | 78 | 119 | 196,9673402(9) | 19,8915(19) uur | β$^−$ | $^{197}$Au | 1/2$^−$ | |
| $^{197m}$Pt | 399,59(20) keV | 399,59(20) keV | 399,59(20) keV | 95,41(18) min | IT (96,7%) | $^{197}$Pt | 13/2$^+$ | |
| $^{197m}$Pt | 399,59(20) keV | 399,59(20) keV | 399,59(20) keV | 95,41(18) min | β$^−$ (3,3%) | $^{197}$Au | 13/2$^+$ | |
| $^{198}$Pt | 78 | 120 | 197,967893(3) | stabiel | stabiel | stabiel | 0$^+$ | 0,07163(55) |
| $^{199}$Pt | 78 | 121 | 198,970593(3) | 30,80(21) min | β$^−$ | $^{199}$Au | 5/2$^−$ | |
| $^{199m}$Pt | 424(2) keV | 424(2) keV | 424(2) keV | 13,6(4) s | IT | $^{199}$Pt | (13/2)$^+$ | |
| $^{200}$Pt | 78 | 122 | 199,971441(22) | 12,5(3) uur | β$^−$ | $^{200}$Au | 0$^+$ | |
| $^{201}$Pt | 78 | 123 | 200,97451(5) | 2,5(1) min | β$^−$ | $^{201}$Au | (5/2$^−$) | |
| $^{202}$Pt | 78 | 124 | 201,97574(32) | 44(15) uur | β$^−$ | $^{202}$Au | 0$^+$ | |

## Overzicht van isotopen per element

* (en) R.B. Firestone, S.Y. Frank Chu & C.M. Baglin (1999) - Table of Isotopes (online versie van de cd-rom)
* (en) G. Audi, A.H. Wapstra, C. Thibault, J. Blachot & O. Bersillon (2003) - The NUBASE evaluation of nuclear and decay properties, Nuclear Physics A, 729, pp. 3-128
* (en) J.R. de Laeter, J.K. Böhlke, P. De Bièvre, H. Hidaka, H.S. Peiser, K.J.R. Rosman & P.D.P. Taylor (2003) - Atomic weights of the elements. Review 2000 (IUPAC Technical Report), Pure and Applied Chemistry, 75 (6), pp. 683–800
* (en) M.E. Wieser (2006) - Atomic weights of the elements 2005 (IUPAC Technical Report), Pure and Applied Chemistry, 78 (11), pp. 2051–2066
* (en) David R. Lide (2004) - CRC Handbook of Chemistry and Physics (85th ed.), hoofdstuk 11, CRC Press - ISBN 978-0849304859
$^{166}$Pt · $^{167}$Pt · $^{168}$Pt · $^{169}$Pt · $^{170}$Pt · $^{171}$Pt · $^{172}$Pt · $^{173}$Pt · $^{174}$Pt · $^{175}$Pt · $^{176}$Pt · $^{177}$Pt · $^{177m}$Pt · $^{178}$Pt · $^{179}$Pt · $^{180}$Pt · $^{181}$Pt · $^{182}$Pt · $^{183}$Pt · $^{183m1}$Pt · $^{183m2}$Pt · $^{184}$Pt · $^{184m}$Pt · $^{185}$Pt · $^{185m}$Pt · $^{186}$Pt · $^{187}$Pt · $^{188}$Pt · $^{189}$Pt · $^{189m1}$Pt · $^{189m2}$Pt · $^{190}$Pt · $^{191}$Pt · $^{191m1}$Pt · $^{191m2}$Pt · $^{192}$Pt · $^{193}$Pt · $^{193m}$Pt · $^{194}$Pt · $^{195}$Pt · $^{195m}$Pt · $^{196}$Pt · $^{197}$Pt · $^{197m}$Pt · $^{198}$Pt · $^{199}$Pt · $^{199m}$Pt · $^{200}$Pt · $^{201}$Pt · $^{202}$Pt · $^{203}$Pt · $^{204}$Pt · $^{205}$Pt · $^{206}$Pt · $^{207}$Pt · $^{208}$Pt