hafnium
| Property | Value |
|---|---|
| Symbol | Hf |
| Atomic number | 72 |
| IRI | https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/elements/Hafnium |
| Wikidata | Q1119 |
Standard atomic weight
| Value | Year | Source | Status | Declaration |
|---|---|---|---|---|
| 178.486(6) | 2019 | 10.1515/pac-2019-0603 | Current | AW-Hf-standard |
| 178.49(2) | 1985 | 10.1351/pac198658121677 | Deprecated, see AW-Hf-standard |
AW-Hf-standard-1985 |
| 178.49(3) | 1969 | 10.1351/pac197021010091 | Deprecated, see AW-Hf-standard-1985 |
AW-Hf-standard-1969 |
| 178.49 | 1961 | 10.1021/ja00881a001 | Deprecated, see AW-Hf-standard-1969 |
AW-Hf-standard-1961 |
| 178.50 | 1955 | 10.1021/ja01595a001 | Deprecated, see AW-Hf-standard-1961 |
AW-Hf-standard-1955 |
| 178.6 | 1931 | 10.1039/JR9310001617 | Deprecated, see AW-Hf-standard-1955 |
AW-Hf-standard-1931 |
Notes: g
Isotopes
| A | Representative isotopic composition | Year | Source | Declaration | ChEBI | Wikidata |
|---|---|---|---|---|---|---|
| 174 | 0.001 61(2) | — | — | Abundance-Hf174 |
— | Q18087008 |
| 176 | 0.0524(14) | — | — | Abundance-Hf176 |
— | Q18087012 |
| 177 | 0.1858(9) | — | — | Abundance-Hf177 |
— | Q18087014 |
| 178 | 0.2728(6) | — | — | Abundance-Hf178 |
— | Q3125680 |
| 179 | 0.1363(3) | — | — | Abundance-Hf179 |
— | Q18087018 |
| 180 | 0.3512(16) | — | — | Abundance-Hf180 |
— | Q18087020 |
Notes: g
Notes
g Geological and biological materials are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such materials and that given in the table may exceed the stated uncertainty.
Bibliography
Atomic weights of the elements 1969. (1970). Pure and Applied Chemistry, 21(1), 91–108. https://doi.org/10.1351/pac197021010091 CrossRef Scholia
Atomic weights of the elements 1985. (1986). Pure and Applied Chemistry, 58(12), 1677–1692. https://doi.org/10.1351/pac198658121677 CrossRef Scholia
Baxter, G. P., Curie, Mme. M., Hönigschmid, O., Lebeau, P., & Meyer, R. J. (1931). First Report of the Committee on the Atomic Weights of the International Union of Chemistry. J. Chem. Soc., 0(0), 1617–1627. https://doi.org/10.1039/jr9310001617 CrossRef Scholia
Cameron, A. E., & Wichers, Edward. (1962). Report of the International Commission on Atomic Weights*(1961). Journal of the American Chemical Society, 84(22), 4175–4197. https://doi.org/10.1021/ja00881a001 CrossRef Scholia
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). Pure and Applied Chemistry, 94(5), 573–600. https://doi.org/10.1515/pac-2019-0603 CrossRef Scholia
Turtle
This resource as a file: Hafnium.ttl
# 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 skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix unit: <http://qudt.org/vocab/unit/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
ciaaw:note-g a ciaaw:Footnote ;
skos:definition "Geological and biological materials are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such materials and that given in the table may exceed the stated uncertainty."@en ;
skos:notation "g" .
ciaaw_draft:AW-Hf-standard-1931 a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:isReplacedBy ciaaw_draft:AW-Hf-standard-1955 ;
dcterms:issued "1931"^^xsd:gYear ;
dcterms:source <https://doi.org/10.1039/JR9310001617> ;
owl:deprecated true ;
adms:status <http://purl.org/adms/status/Deprecated> ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.6 ] .
ciaaw_draft:AW-Hf-standard a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:issued "2019"^^xsd:gYear ;
dcterms:replaces ciaaw_draft:AW-Hf-standard-1985 ;
dcterms:source <https://doi.org/10.1515/pac-2019-0603> ;
ciaaw:footnote ciaaw:note-g ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.486 ;
qudt:standardUncertainty 0.006 ;
ciaaw:significantFigures 6 ;
ciaaw:significantFiguresUncertainty 1 ] .
ciaaw_draft:AW-Hf-standard-1955 a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:isReplacedBy ciaaw_draft:AW-Hf-standard-1961 ;
dcterms:issued "1955"^^xsd:gYear ;
dcterms:replaces ciaaw_draft:AW-Hf-standard-1931 ;
dcterms:source <https://doi.org/10.1021/ja01595a001> ;
owl:deprecated true ;
adms:status <http://purl.org/adms/status/Deprecated> ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.50 ] .
ciaaw_draft:AW-Hf-standard-1961 a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:isReplacedBy ciaaw_draft:AW-Hf-standard-1969 ;
dcterms:issued "1961"^^xsd:gYear ;
dcterms:replaces ciaaw_draft:AW-Hf-standard-1955 ;
dcterms:source <https://doi.org/10.1021/ja00881a001> ;
owl:deprecated true ;
adms:status <http://purl.org/adms/status/Deprecated> ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.49 ] .
ciaaw_draft:AW-Hf-standard-1969 a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:isReplacedBy ciaaw_draft:AW-Hf-standard-1985 ;
dcterms:issued "1969"^^xsd:gYear ;
dcterms:replaces ciaaw_draft:AW-Hf-standard-1961 ;
dcterms:source <https://doi.org/10.1351/pac197021010091> ;
owl:deprecated true ;
adms:status <http://purl.org/adms/status/Deprecated> ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.49 ;
qudt:standardUncertainty 0.03 ;
ciaaw:significantFigures 5 ;
ciaaw:significantFiguresUncertainty 1 ] .
ciaaw_draft:AW-Hf-standard-1985 a ciaaw:StandardAtomicWeightDeclaration ;
dcterms:isReplacedBy ciaaw_draft:AW-Hf-standard ;
dcterms:issued "1985"^^xsd:gYear ;
dcterms:replaces ciaaw_draft:AW-Hf-standard-1969 ;
dcterms:source <https://doi.org/10.1351/pac198658121677> ;
owl:deprecated true ;
adms:status <http://purl.org/adms/status/Deprecated> ;
ciaaw:ofElement element:Hafnium ;
ciaaw:value [ a qudt:QuantityValue ;
qudt:hasUnit unit:UNITLESS ;
qudt:numericValue 178.49 ;
qudt:standardUncertainty 0.02 ;
ciaaw:significantFigures 5 ;
ciaaw:significantFiguresUncertainty 1 ] .
element:Hafnium a chemrof:ChemicalElement ;
rdfs:label "hafnium"@en ;
ciaaw:currentStandardAtomicWeight ciaaw_draft:AW-Hf-standard ;
ciaaw:hasDeclaration ciaaw_draft:AW-Hf-standard,
ciaaw_draft:AW-Hf-standard-1931,
ciaaw_draft:AW-Hf-standard-1955,
ciaaw_draft:AW-Hf-standard-1961,
ciaaw_draft:AW-Hf-standard-1969,
ciaaw_draft:AW-Hf-standard-1985 ;
ciaaw:hasIsotope ciaaw_draft:Hf-174,
ciaaw_draft:Hf-176,
ciaaw_draft:Hf-177,
ciaaw_draft:Hf-178,
ciaaw_draft:Hf-179,
ciaaw_draft:Hf-180 ;
ciaaw:standardAtomicWeightUncertainty 0.006 ;
ciaaw:standardAtomicWeightValue 178.486 ;
chemrof:atomic_number 72 ;
chemrof:symbol "Hf" .