# erbium

> chemical element with symbol Er and atomic number 68

**Wikidata**: [Q1849](https://www.wikidata.org/wiki/Q1849)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Erbium)  
**Source**: https://4ort.xyz/entity/erbium


## References

1. Source
2. erbium. Global Substance Registration System
3. ERBIUM. PubChem
4. ChEBI release 2020-09-01
5. Atomic weights of the elements 2009 (IUPAC Technical Report)
6. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=151138)
7. Freebase Data Dumps. 2013
8. Erbium. ChemSpider
9. erbium. ChEBI
10. Atomic weights of the elements 2013 (IUPAC Technical Report)
11. YSO-Wikidata mapping project
12. Erbium. ECHA Substance Infocard database
13. UMLS 2023
14. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
15. National Library of Israel
16. KBpedia
17. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
18. UniChem