> **PROTOTYPE:** a suggestion, not an official CIAAW or IUPAC page. Official values are at [ciaaw.org](https://ciaaw.org).

# platinum

| Property | Value |
| --- | --- |
| Symbol | Pt |
| Atomic number | 78 |
| IRI | `https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/elements/Platinum` |
| Wikidata | [Q880](https://www.wikidata.org/wiki/Q880) |

## Standard atomic weight

| Value | Year | Source | Status | Declaration |
| --- | --- | --- | --- | --- |
| 195.084(9) | 2005 | [10.1351/pac200678112051](https://doi.org/10.1351/pac200678112051) | Current | [`AW-Pt-standard`](../id/AW-Pt-standard.md) |
| 195.078(2) | 1995 | [10.1351/pac199668122339](https://doi.org/10.1351/pac199668122339) | Deprecated, see [`AW-Pt-standard`](../id/AW-Pt-standard.md) | [`AW-Pt-standard-1995`](../id/AW-Pt-standard-1995.md) |
| 195.08(3) | 1979 | [10.1351/pac198052102349](https://doi.org/10.1351/pac198052102349) | Deprecated, see [`AW-Pt-standard-1995`](../id/AW-Pt-standard-1995.md) | [`AW-Pt-standard-1979`](../id/AW-Pt-standard-1979.md) |
| 195.09(3) | 1969 | [10.1351/pac197021010091](https://doi.org/10.1351/pac197021010091) | Deprecated, see [`AW-Pt-standard-1979`](../id/AW-Pt-standard-1979.md) | [`AW-Pt-standard-1969`](../id/AW-Pt-standard-1969.md) |
| 195.09 | 1955 | [10.1021/ja01595a001](https://doi.org/10.1021/ja01595a001) | Deprecated, see [`AW-Pt-standard-1969`](../id/AW-Pt-standard-1969.md) | [`AW-Pt-standard-1955`](../id/AW-Pt-standard-1955.md) |
| 195.23 | 1925 | [10.1039/CT9252700913](https://doi.org/10.1039/CT9252700913) | Deprecated, see [`AW-Pt-standard-1955`](../id/AW-Pt-standard-1955.md) | [`AW-Pt-standard-1925`](../id/AW-Pt-standard-1925.md) |
| 195.2 | 1911 | [10.1021/ja01928a001](https://doi.org/10.1021/ja01928a001) | Deprecated, see [`AW-Pt-standard-1925`](../id/AW-Pt-standard-1925.md) | [`AW-Pt-standard-1911`](../id/AW-Pt-standard-1911.md) |
| 195 | 1909 | [10.1021/ja01931a001](https://doi.org/10.1021/ja01931a001) | Deprecated, see [`AW-Pt-standard-1911`](../id/AW-Pt-standard-1911.md) | [`AW-Pt-standard-1909`](../id/AW-Pt-standard-1909.md) |
| 194.8 | 1902 | [10.1007/BF01370337](https://doi.org/10.1007/BF01370337) | Deprecated, see [`AW-Pt-standard-1909`](../id/AW-Pt-standard-1909.md) | [`AW-Pt-standard-1902`](../id/AW-Pt-standard-1902.md) |


## Isotopes

| A | Representative isotopic composition | Year | Source | Declaration | ChEBI | Wikidata |
| --- | --- | --- | --- | --- | --- | --- |
| [190](../id/Pt-190.md) | 0.000 12(2) | — | — | [`Abundance-Pt190`](../id/Abundance-Pt190.md) | — | [Q18883092](https://www.wikidata.org/wiki/Q18883092) |
| [192](../id/Pt-192.md) | 0.007 82(24) | — | — | [`Abundance-Pt192`](../id/Abundance-Pt192.md) | — | [Q18883096](https://www.wikidata.org/wiki/Q18883096) |
| [194](../id/Pt-194.md) | 0.328 64(410) | — | — | [`Abundance-Pt194`](../id/Abundance-Pt194.md) | — | [Q18883099](https://www.wikidata.org/wiki/Q18883099) |
| [195](../id/Pt-195.md) | 0.337 75(240) | — | — | [`Abundance-Pt195`](../id/Abundance-Pt195.md) | — | [Q18883100](https://www.wikidata.org/wiki/Q18883100) |
| [196](../id/Pt-196.md) | 0.252 11(340) | — | — | [`Abundance-Pt196`](../id/Abundance-Pt196.md) | — | [Q18883102](https://www.wikidata.org/wiki/Q18883102) |
| [198](../id/Pt-198.md) | 0.073 56(130) | — | — | [`Abundance-Pt198`](../id/Abundance-Pt198.md) | — | [Q18883105](https://www.wikidata.org/wiki/Q18883105) |

## Bibliography

<div class="csl-bib-body">
<div class="csl-entry">Aston, F. W., Baxter, G. P., Brauner, B., Debierne, A., Leduc, A., Richards, T. W., Soddy, F., &#38; Urbain, G. (1925). Second Report of the International Committee of the International Union of Pure and Applied Chemistry on the chemical elements. International atomic weights, 1925. <i>Journal of the Chemical Society, Transactions</i>, <i>127</i>, 913. https://doi.org/10.1039/ct9252700913 <a href="https://doi.org/10.1039/CT9252700913">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1039/CT9252700913">Scholia</a></div>
<div class="csl-entry">Atomic weights of the elements 1969. (1970). <i>Pure and Applied Chemistry</i>, <i>21</i>(1), 91–108. https://doi.org/10.1351/pac197021010091 <a href="https://doi.org/10.1351/pac197021010091">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1351/pac197021010091">Scholia</a></div>
<div class="csl-entry">Atomic Weights of the Elements 1979. (1980). <i>Pure and Applied Chemistry</i>, <i>52</i>(10), 2349–2384. https://doi.org/10.1351/pac198052102349 <a href="https://doi.org/10.1351/pac198052102349">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1351/pac198052102349">Scholia</a></div>
<div class="csl-entry">Clarke, F. W., Ostwald, W., Thorpe, T. E., &#38; Urbain, G. (1909). REPORT OF THE INTERNATIONAL COMMITTEE ON ATOMIC WEIGHTS. 1909. <i>Journal of the American Chemical Society</i>, <i>31</i>(1), 1–6. https://doi.org/10.1021/ja01931a001 <a href="https://doi.org/10.1021/ja01931a001">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1021/ja01931a001">Scholia</a></div>
<div class="csl-entry">Clarke, F. W., Thorpe, T. E., Ostwald, W., &#38; Urbain, G. (1910). ANNUAL REPORT OF THE INTERNATIONAL COMMITTEE ON ATOMIC WEIGHTS, 1911. <i>Journal of the American Chemical Society</i>, <i>32</i>(10), 1113–1116. https://doi.org/10.1021/ja01928a001 <a href="https://doi.org/10.1021/ja01928a001">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1021/ja01928a001">Scholia</a></div>
<div class="csl-entry">Coplen, T. B. (1996). Atomic weights of the elements 1995 (Technical Report). <i>Pure and Applied Chemistry</i>, <i>68</i>(12), 2339–2359. https://doi.org/10.1351/pac199668122339 <a href="https://doi.org/10.1351/pac199668122339">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1351/pac199668122339">Scholia</a></div>
<div class="csl-entry">Richards, Baxter, Hinrichsen, Köthner, P., &#38; Pellini, S. (1902). Zur Festsetzung der Atomgewichte. <i>Fresenius’ Zeitschrift für analytische Chemie</i>, <i>41</i>(2), 139–140. https://doi.org/10.1007/bf01370337 <a href="https://doi.org/10.1007/BF01370337">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1007/BF01370337">Scholia</a></div>
<div class="csl-entry">Wichers, E. (1956). Report on Atomic Weights for 1954-55. <i>Journal of the American Chemical Society</i>, <i>78</i>(14), 3235–3240. https://doi.org/10.1021/ja01595a001 <a href="https://doi.org/10.1021/ja01595a001">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1021/ja01595a001">Scholia</a></div>
<div class="csl-entry">Wieser, M. E. (2006). Atomic weights of the elements 2005 (IUPAC Technical Report). <i>Pure and Applied Chemistry</i>, <i>78</i>(11), 2051–2066. https://doi.org/10.1351/pac200678112051 <a href="https://doi.org/10.1351/pac200678112051">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1351/pac200678112051">Scholia</a></div>
</div>

## Turtle

This resource as a file: [Platinum.ttl](Platinum.ttl)

```turtle
# Prototype: a suggestion, not an official CIAAW or IUPAC record. Official values are at https://ciaaw.org

@prefix adms: <http://www.w3.org/ns/adms#> .
@prefix chemrof: <https://w3id.org/chemrof/> .
@prefix ciaaw: <https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/ciaaw-draft#> .
@prefix ciaaw_draft: <https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/id/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix element: <https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/elements/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix unit: <http://qudt.org/vocab/unit/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

ciaaw_draft:AW-Pt-standard-1902 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1909 ;
    dcterms:issued "1902"^^xsd:gYear ;
    dcterms:source <https://doi.org/10.1007/BF01370337> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 194.8 ] .

ciaaw_draft:AW-Pt-standard a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:issued "2005"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1995 ;
    dcterms:source <https://doi.org/10.1351/pac200678112051> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.084 ;
            qudt:standardUncertainty 0.009 ;
            ciaaw:significantFigures 6 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Pt-standard-1909 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1911 ;
    dcterms:issued "1909"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1902 ;
    dcterms:source <https://doi.org/10.1021/ja01931a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.0 ] .

ciaaw_draft:AW-Pt-standard-1911 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1925 ;
    dcterms:issued "1911"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1909 ;
    dcterms:source <https://doi.org/10.1021/ja01928a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.2 ] .

ciaaw_draft:AW-Pt-standard-1925 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1955 ;
    dcterms:issued "1925"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1911 ;
    dcterms:source <https://doi.org/10.1039/CT9252700913> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.23 ] .

ciaaw_draft:AW-Pt-standard-1955 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1969 ;
    dcterms:issued "1955"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1925 ;
    dcterms:source <https://doi.org/10.1021/ja01595a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.09 ] .

ciaaw_draft:AW-Pt-standard-1969 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1979 ;
    dcterms:issued "1969"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1955 ;
    dcterms:source <https://doi.org/10.1351/pac197021010091> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.09 ;
            qudt:standardUncertainty 0.03 ;
            ciaaw:significantFigures 5 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Pt-standard-1979 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard-1995 ;
    dcterms:issued "1979"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1969 ;
    dcterms:source <https://doi.org/10.1351/pac198052102349> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.08 ;
            qudt:standardUncertainty 0.03 ;
            ciaaw:significantFigures 5 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Pt-standard-1995 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Pt-standard ;
    dcterms:issued "1995"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Pt-standard-1979 ;
    dcterms:source <https://doi.org/10.1351/pac199668122339> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Platinum ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 195.078 ;
            qudt:standardUncertainty 0.002 ;
            ciaaw:significantFigures 6 ;
            ciaaw:significantFiguresUncertainty 1 ] .

element:Platinum a chemrof:ChemicalElement ;
    rdfs:label "platinum"@en ;
    ciaaw:currentStandardAtomicWeight ciaaw_draft:AW-Pt-standard ;
    ciaaw:hasDeclaration ciaaw_draft:AW-Pt-standard,
        ciaaw_draft:AW-Pt-standard-1902,
        ciaaw_draft:AW-Pt-standard-1909,
        ciaaw_draft:AW-Pt-standard-1911,
        ciaaw_draft:AW-Pt-standard-1925,
        ciaaw_draft:AW-Pt-standard-1955,
        ciaaw_draft:AW-Pt-standard-1969,
        ciaaw_draft:AW-Pt-standard-1979,
        ciaaw_draft:AW-Pt-standard-1995 ;
    ciaaw:hasIsotope ciaaw_draft:Pt-190,
        ciaaw_draft:Pt-192,
        ciaaw_draft:Pt-194,
        ciaaw_draft:Pt-195,
        ciaaw_draft:Pt-196,
        ciaaw_draft:Pt-198 ;
    ciaaw:standardAtomicWeightUncertainty 0.009 ;
    ciaaw:standardAtomicWeightValue 195.084 ;
    chemrof:atomic_number 78 ;
    chemrof:symbol "Pt" .
```

[All atomic weights](../atomic-weights.md) · [All isotopic abundances](../isotopic-abundances.md)