PROTOTYPE: a suggestion, not an official CIAAW or IUPAC page. Official values are at ciaaw.org.
IUPAC Project 2019-020-2-024Linked-data suggestion · unofficial prototype

gadolinium

Property Value
Symbol Gd
Atomic number 64
IRI https://hendrikborgelt.github.io/Draft_for_IUPAC_CIAAW-Isotopic-Abundances-and-Atomic-Weights/elements/Gadolinium
Wikidata Q1832

Standard atomic weight

Value Year Source Status Declaration
157.249(2) 2024 — Current AW-Gd-standard
157.25(3) 1969 10.1351/pac197021010091 Deprecated, see AW-Gd-standard AW-Gd-standard-1969
157.25 1961 10.1021/ja00881a001 Deprecated, see AW-Gd-standard-1969 AW-Gd-standard-1961
157.26 1955 10.1021/ja01595a001 Deprecated, see AW-Gd-standard-1961 AW-Gd-standard-1955
156.9 1937 10.1039/JR9370001900 Deprecated, see AW-Gd-standard-1955 AW-Gd-standard-1937
157.3 1931 10.1039/JR9310001617 Deprecated, see AW-Gd-standard-1937 AW-Gd-standard-1931
157.26 1925 10.1039/CT9252700913 Deprecated, see AW-Gd-standard-1931 AW-Gd-standard-1925
157.3 1909 10.1021/ja01931a001 Deprecated, see AW-Gd-standard-1925 AW-Gd-standard-1909
156 1902 10.1007/BF01370337 Deprecated, see AW-Gd-standard-1909 AW-Gd-standard-1902

Notes: g

Isotopes

A Representative isotopic composition Year Source Declaration ChEBI Wikidata
152 0.002 04(2) — — Abundance-Gd152 — Q3532075
154 0.021 87(9) — — Abundance-Gd154 — Q2175390
155 0.148 28(60) — — Abundance-Gd155 — Q2972794
156 0.204 93(22) — — Abundance-Gd156 — Q4505367
157 0.156 57(17) — — Abundance-Gd157 — Q2226266
158 0.248 20(20) — — Abundance-Gd158 — Q2237256
160 0.218 11(28) — — Abundance-Gd160 — Q2488300

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

Aston, F. W., Baxter, G. P., Brauner, B., Debierne, A., Leduc, A., Richards, T. W., Soddy, F., & 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. Journal of the Chemical Society, Transactions, 127, 913. https://doi.org/10.1039/ct9252700913 CrossRef Scholia
Atomic weights of the elements 1969. (1970). Pure and Applied Chemistry, 21(1), 91–108. https://doi.org/10.1351/pac197021010091 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
Clarke, F. W., Ostwald, W., Thorpe, T. E., & Urbain, G. (1909). REPORT OF THE INTERNATIONAL COMMITTEE ON ATOMIC WEIGHTS. 1909. Journal of the American Chemical Society, 31(1), 1–6. https://doi.org/10.1021/ja01931a001 CrossRef Scholia
Hönigschmid, O., & Lebeau, P. (1937). Seventh Report of the Committee on Atomic Weights of the International Union of Chemistry. J. Chem. Soc., 0(0), 1900–1909. https://doi.org/10.1039/jr9370001900 CrossRef Scholia
Richards, Baxter, Hinrichsen, Köthner, P., & Pellini, S. (1902). Zur Festsetzung der Atomgewichte. Fresenius’ Zeitschrift für analytische Chemie, 41(2), 139–140. https://doi.org/10.1007/bf01370337 CrossRef Scholia
Wichers, E. (1956). Report on Atomic Weights for 1954-55. Journal of the American Chemical Society, 78(14), 3235–3240. https://doi.org/10.1021/ja01595a001 CrossRef Scholia

Turtle

This resource as a file: Gadolinium.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-Gd-standard-1902 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-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:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 156.0 ] .

ciaaw_draft:AW-Gd-standard a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:issued "2024"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1969 ;
    ciaaw:footnote ciaaw:note-g ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.249 ;
            qudt:standardUncertainty 0.002 ;
            ciaaw:significantFigures 6 ;
            ciaaw:significantFiguresUncertainty 1 ] .

ciaaw_draft:AW-Gd-standard-1909 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1925 ;
    dcterms:issued "1909"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1902 ;
    dcterms:source <https://doi.org/10.1021/ja01931a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.3 ] .

ciaaw_draft:AW-Gd-standard-1925 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1931 ;
    dcterms:issued "1925"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1909 ;
    dcterms:source <https://doi.org/10.1039/CT9252700913> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.26 ] .

ciaaw_draft:AW-Gd-standard-1931 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1937 ;
    dcterms:issued "1931"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1925 ;
    dcterms:source <https://doi.org/10.1039/JR9310001617> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.3 ] .

ciaaw_draft:AW-Gd-standard-1937 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1955 ;
    dcterms:issued "1937"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1931 ;
    dcterms:source <https://doi.org/10.1039/JR9370001900> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 156.9 ] .

ciaaw_draft:AW-Gd-standard-1955 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1961 ;
    dcterms:issued "1955"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1937 ;
    dcterms:source <https://doi.org/10.1021/ja01595a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.26 ] .

ciaaw_draft:AW-Gd-standard-1961 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard-1969 ;
    dcterms:issued "1961"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1955 ;
    dcterms:source <https://doi.org/10.1021/ja00881a001> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.25 ] .

ciaaw_draft:AW-Gd-standard-1969 a ciaaw:StandardAtomicWeightDeclaration ;
    dcterms:isReplacedBy ciaaw_draft:AW-Gd-standard ;
    dcterms:issued "1969"^^xsd:gYear ;
    dcterms:replaces ciaaw_draft:AW-Gd-standard-1961 ;
    dcterms:source <https://doi.org/10.1351/pac197021010091> ;
    owl:deprecated true ;
    adms:status <http://purl.org/adms/status/Deprecated> ;
    ciaaw:ofElement element:Gadolinium ;
    ciaaw:value [ a qudt:QuantityValue ;
            qudt:hasUnit unit:UNITLESS ;
            qudt:numericValue 157.25 ;
            qudt:standardUncertainty 0.03 ;
            ciaaw:significantFigures 5 ;
            ciaaw:significantFiguresUncertainty 1 ] .

element:Gadolinium a chemrof:ChemicalElement ;
    rdfs:label "gadolinium"@en ;
    ciaaw:currentStandardAtomicWeight ciaaw_draft:AW-Gd-standard ;
    ciaaw:hasDeclaration ciaaw_draft:AW-Gd-standard,
        ciaaw_draft:AW-Gd-standard-1902,
        ciaaw_draft:AW-Gd-standard-1909,
        ciaaw_draft:AW-Gd-standard-1925,
        ciaaw_draft:AW-Gd-standard-1931,
        ciaaw_draft:AW-Gd-standard-1937,
        ciaaw_draft:AW-Gd-standard-1955,
        ciaaw_draft:AW-Gd-standard-1961,
        ciaaw_draft:AW-Gd-standard-1969 ;
    ciaaw:hasIsotope ciaaw_draft:Gd-152,
        ciaaw_draft:Gd-154,
        ciaaw_draft:Gd-155,
        ciaaw_draft:Gd-156,
        ciaaw_draft:Gd-157,
        ciaaw_draft:Gd-158,
        ciaaw_draft:Gd-160 ;
    ciaaw:standardAtomicWeightUncertainty 0.002 ;
    ciaaw:standardAtomicWeightValue 157.249 ;
    chemrof:atomic_number 64 ;
    chemrof:symbol "Gd" .

All atomic weights · All isotopic abundances