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

# iridium

| Property | Value |
| --- | --- |
| Symbol | Ir |
| Atomic number | 77 |
| IRI | `https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/elements/Iridium` |
| Wikidata | [Q877](https://www.wikidata.org/wiki/Q877) |

## Standard atomic weight

| Value | Year | Source | Status | Declaration |
| --- | --- | --- | --- | --- |
| 192.217(2) | 2017 | [10.1515/pac-2019-0603](https://doi.org/10.1515/pac-2019-0603) | Current | [`AW-Ir-standard`](../id/AW-Ir-standard.md) |
| 192.217(3) | 1993 | [10.1351/pac199466122423](https://doi.org/10.1351/pac199466122423) | Deprecated, see [`AW-Ir-standard`](../id/AW-Ir-standard.md) | [`AW-Ir-standard-1993`](../id/AW-Ir-standard-1993.md) |
| 192.22(3) | 1969 | [10.1351/pac197021010091](https://doi.org/10.1351/pac197021010091) | Deprecated, see [`AW-Ir-standard-1993`](../id/AW-Ir-standard-1993.md) | [`AW-Ir-standard-1969`](../id/AW-Ir-standard-1969.md) |
| 192.2 | 1953 | [10.1039/JR9540004713](https://doi.org/10.1039/JR9540004713) | Deprecated, see [`AW-Ir-standard-1969`](../id/AW-Ir-standard-1969.md) | [`AW-Ir-standard-1953`](../id/AW-Ir-standard-1953.md) |
| 193.1 | 1909 | [10.1021/ja01931a001](https://doi.org/10.1021/ja01931a001) | Deprecated, see [`AW-Ir-standard-1953`](../id/AW-Ir-standard-1953.md) | [`AW-Ir-standard-1909`](../id/AW-Ir-standard-1909.md) |
| 193 | 1902 | [10.1007/BF01370337](https://doi.org/10.1007/BF01370337) | Deprecated, see [`AW-Ir-standard-1909`](../id/AW-Ir-standard-1909.md) | [`AW-Ir-standard-1902`](../id/AW-Ir-standard-1902.md) |


## Isotopes

| A | Representative isotopic composition | Year | Source | Declaration | ChEBI | Wikidata |
| --- | --- | --- | --- | --- | --- | --- |
| [191](../id/Ir-191.md) | 0.3723(9) | — | — | [`Abundance-Ir191`](../id/Abundance-Ir191.md) | — | [Q18883039](https://www.wikidata.org/wiki/Q18883039) |
| [193](../id/Ir-193.md) | 0.6277(9) | — | — | [`Abundance-Ir193`](../id/Abundance-Ir193.md) | — | [Q18883045](https://www.wikidata.org/wiki/Q18883045) |

## Bibliography

<div class="csl-bib-body">
<div class="csl-entry">(1994). <i>Pure and Applied Chemistry</i>, <i>66</i>(12), 2423–2444. https://doi.org/10.1351/pac199466122423 <a href="https://doi.org/10.1351/pac199466122423">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1351/pac199466122423">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">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">International atomic weights, 1953. (1954). <i>Journal of the Chemical Society (Resumed)</i>, 4713. https://doi.org/10.1039/jr9540004713 <a href="https://doi.org/10.1039/JR9540004713">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1039/JR9540004713">Scholia</a></div>
<div class="csl-entry">Prohaska, T., Irrgeher, J., Benefield, J., Böhlke, J. K., Chesson, L. A., Coplen, T. B., Ding, T., Dunn, P. J. H., Gröning, M., Holden, N. E., Meijer, H. A. J., Moossen, H., Possolo, A., Takahashi, Y., Vogl, J., Walczyk, T., Wang, J., Wieser, M. E., Yoneda, S., … Meija, J. (2022). Standard atomic weights of the elements 2021 (IUPAC Technical Report). <i>Pure and Applied Chemistry</i>, <i>94</i>(5), 573–600. https://doi.org/10.1515/pac-2019-0603 <a href="https://doi.org/10.1515/pac-2019-0603">CrossRef</a> <a href="https://qlever.scholia.wiki/doi/10.1515/pac-2019-0603">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>

## Turtle

This resource as a file: [Iridium.ttl](Iridium.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-Ir-standard-1902 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Ir-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:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 193.0 ] .

ciaaw_draft:AW-Ir-standard a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:issued "2017"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Ir-standard-1993 ;
    dcterms:source <https://doi.org/10.1515/pac-2019-0603> ;
    ciaaw:ofElement element:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 192.217 ;
            qudt:standardUncertainty 0.002 ;
            ciaaw:significantFigures 6 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Ir-standard-1909 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Ir-standard-1953 ;
    dcterms:issued "1909"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Ir-standard-1902 ;
    dcterms:source <https://doi.org/10.1021/ja01931a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 193.1 ] .

ciaaw_draft:AW-Ir-standard-1953 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Ir-standard-1969 ;
    dcterms:issued "1953"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Ir-standard-1909 ;
    dcterms:source <https://doi.org/10.1039/JR9540004713> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 192.2 ] .

ciaaw_draft:AW-Ir-standard-1969 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Ir-standard-1993 ;
    dcterms:issued "1969"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Ir-standard-1953 ;
    dcterms:source <https://doi.org/10.1351/pac197021010091> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 192.22 ;
            qudt:standardUncertainty 0.03 ;
            ciaaw:significantFigures 5 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Ir-standard-1993 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Ir-standard ;
    dcterms:issued "1993"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Ir-standard-1969 ;
    dcterms:source <https://doi.org/10.1351/pac199466122423> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Iridium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 192.217 ;
            qudt:standardUncertainty 0.003 ;
            ciaaw:significantFigures 6 ;
            ciaaw:significantFiguresUncertainty 1 ] .

element:Iridium a chemrof:ChemicalElement ;
    rdfs:label "iridium"@en ;
    ciaaw:currentStandardAtomicWeight ciaaw_draft:AW-Ir-standard ;
    ciaaw:hasDeclaration ciaaw_draft:AW-Ir-standard,
        ciaaw_draft:AW-Ir-standard-1902,
        ciaaw_draft:AW-Ir-standard-1909,
        ciaaw_draft:AW-Ir-standard-1953,
        ciaaw_draft:AW-Ir-standard-1969,
        ciaaw_draft:AW-Ir-standard-1993 ;
    ciaaw:hasIsotope ciaaw_draft:Ir-191,
        ciaaw_draft:Ir-193 ;
    ciaaw:standardAtomicWeightUncertainty 0.002 ;
    ciaaw:standardAtomicWeightValue 192.217 ;
    chemrof:atomic_number 77 ;
    chemrof:symbol "Ir" .
```

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