Talk:Isotopes of platinum

Column

There is a column on the right entitled "Range of natural variation" with no items in it. This is idiotic. — Preceding unsigned comment added by 92.26.7.176 (talk) 13:06, 18 February 2013 (UTC)

In the article Isotopes of copper, some numbers do appear in the column on the right, for the two stable isotopes of copper. — Preceding unsigned comment added by 92.27.109.117 (talk) 11:32, 19 February 2013 (UTC)

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The only beta-stable nuclide of odd mass number with N/Z = 1.5

¹⁹⁵Pt is the only beta-stable nuclide with odd mass number such that N:Z = 3:2. ⁵ⁿ_2nX is beta-stable for n = 1, 26, even numbers from 30 to 46 and 39 (not primordial for n = 1 or even numbers from 42 to 46). Cristiano Toàn (talk) 08:32, 28 February 2024 (UTC)For even n from 36 to 40 these nuclides are also double bete-stable

Also for 42 and 44 :) 129.104.241.242 (talk) 02:38, 5 May 2024 (UTC)

Bound-state β− decay of ¹⁹⁵Pt: reference required?

Could anyone please give some reference of the bound-state β− decay of ¹⁹⁵Pt to ¹⁹⁵Au, of which, unlike in the cases of ¹⁶³Dy and ²⁰⁵Tl, I can't find any? 129.104.241.214 (talk) 23:59, 9 October 2023 (UTC)

Removed. –LaundryPizza03 (dc̄) 14:12, 23 December 2023 (UTC)

Half-life of ¹⁹⁰Pt in dispute

proposes a half-life of 4.97(16)×10¹¹ years, 4.49(5)×10¹¹ years in , 3.9(3)×10¹¹ years in and 3.7(3)×10¹¹ years in . Note that a precise determination of half-life of ¹⁹⁰Pt is essential in radioisotopic age determination of some ores and meteorites. 129.104.241.214 (talk) 13:01, 23 December 2023 (UTC)

NUBASE2020 lists a half-life of 483(3) Gy, so we will go with that one. –LaundryPizza03 (dc̄) 13:16, 23 December 2023 (UTC)

"The Pt–Os system has seen only limited application as the radioactive contributions to ¹⁸⁶Os are, at best, very small. For the full utility of this system to be realized, better isotope ratio precisions than currently possible are needed." See page 167 of this book. 14.52.231.91 (talk) 06:49, 27 August 2024 (UTC)

NUBASE2020 is the most recent source, so I am still sticking with it. –LaundryPizza03 (dc̄) 02:17, 28 August 2024 (UTC)

Isotopes of samamrium and those of platinum are similar

Both elements have a weak alpha natural isotope (¹⁴⁷Sm and ¹⁹⁰Pt; ¹⁴⁸Sm and potentially ¹⁴⁹Sm can be seen as stable for pratical uses, but certainly not ¹⁴⁷Sm).

Both elements have an isotope with low beta energy and is expected to be stable (¹⁵¹Sm and ¹⁹³Pt). The similarity of these two nuclides has been pointed out here. Both nuclide have a neutron number with no beta-stable isotones (89 and 115).

Both elements have an isotope with the lowest energy among its isobars and surrounded by non-stable isotopes (¹⁵²Sm and ¹⁹²Pt). 129.104.241.17 (talk) 15:55, 3 February 2025 (UTC)

Why does the template show 0.0120% instead of 0.012% for abundance of Pt-190?

We certainly don't have that many significant digits. 129.104.244.74 (talk) 20:39, 27 May 2025 (UTC)

The template defaults to three significant digits for all values regardless of input. In this case, the trailing zero is necessary to establish three digits and be consistent with the other values. Precise values, as well as their uncertainties (in this case, 0.012(2)%), are listed in the main table. ^Complex/_Rational 22:42, 27 May 2025 (UTC)

OK, thanks. 129.104.244.74 (talk) 00:59, 28 May 2025 (UTC)

Alpha decay of ¹⁸⁷Pt

It is a bit strange that alpha decay of ¹⁸⁷Pt is not known, despite ¹⁸⁷Pt having higher Q_α value than ¹⁸⁵Pt and ¹⁸⁶Pt.

Nuclide	Qα (keV)	α transition	Total half-life	Branching ratio	Partial half-life
184Pt	4598	0+ → 0+	17.3 min	1.7×10−5	1.93 y
185Pt	4437	9/2+ → 1/2−	70.9 min	5.0×10−5	2.70 y
186Pt	4320	0+ → 0+	2.08 h	1.4×10−6	169 y
187Pt	4550	3/2− → 9/2+	2.35 h	?	?

129.104.244.60 (talk) 12:37, 10 July 2025 (UTC)

It seems that likely the adopted mass of its daughter Os-183 is incorrect; it is given with an unusually large uncertainty. I have no reason to think it should be that out of line. Of course the alpha branching of 187 (and 189) is probably measurable for we tried hard enough, but it hasn't. 73.228.195.198 (talk) 23:02, 12 July 2025 (UTC)

Thanks for the information! 194.9.172.211 (talk) 00:15, 2 August 2025 (UTC)

By the way, ¹⁹¹Pt may have an alpha-decay partially half-life of ~10^13.14 years by interpolation. ~2025-34979-90 (talk) 09:56, 20 November 2025 (UTC)