iron(II) oxide

chemical compound
ChemicalSubstance type_of_chemical_entity Q196680
iron(II) oxide
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iron(II) oxide

Summary

iron(II) oxide is a type of chemical entity[1]. It ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (514 views/month).[2]

Key Facts

  • iron(II) oxide's instance of is recorded as type of chemical entity[3].
  • iron(II) oxide's canonical SMILES is recorded as O=[Fe][4].
  • iron(II) oxide's chemical formula is recorded as FeO[5].
  • iron(II) oxide is a type of iron oxide[6].
  • iron(II) oxide's crystal system is recorded as face-centered cubic[7].
  • iron(II) oxide's point group is recorded as cubic-hexoctahedral[8].
  • iron(II) oxide's space group is recorded as space group Fm-3m[9].
  • iron(II) oxide's described by source is recorded as Meyers Konversations-Lexikon, 4th edition (1885–1890)[10].
  • iron(II) oxide's density is recorded as {'amount': '+6.0'}[11].
  • iron(II) oxide's mass is recorded as {'amount': '+71.93'}[12].
  • iron(II) oxide's melting point is recorded as {'amount': '+1377'}[13].
  • iron(II) oxide's boiling point is recorded as {'amount': '+3414'}[14].
  • iron(II) oxide's has part is recorded as oxygen[15].
  • iron(II) oxide's has part is recorded as iron[16].
  • iron(II) oxide's standard molar entropy is recorded as {'amount': '+241.92'}[17].
  • iron(II) oxide's standard molar entropy is recorded as {'amount': '+75.4'}[18].
  • iron(II) oxide's standard molar entropy is recorded as {'amount': '+60.75'}[19].
  • iron(II) oxide's standard enthalpy of formation is recorded as {'amount': '+251.04'}[20].
  • iron(II) oxide's standard enthalpy of formation is recorded as {'amount': '-249.53'}[21].
  • iron(II) oxide's standard enthalpy of formation is recorded as {'amount': '-272.04'}[22].
  • iron(II) oxide's safety classification and labelling is recorded as NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response[23].
  • iron(II) oxide's safety classification and labelling is recorded as Regulation (EC) No. 1272/2008[24].

Why It Matters

iron(II) oxide ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (514 views/month).[2] It has Wikipedia articles in 26 language editions, a strong signal of global cultural recognition.[25] It is known by 41 alternative names across languages and contexts.[26]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [25] ↑ . Wikidata sitelinks. wikidata.org.
  3. [26] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). iron(II) oxide. Retrieved October 5, 2026, from https://4ort.xyz/entity/iron-ii-oxide
MLA “iron(II) oxide.” 4ort.xyz Knowledge Graph, 4ort.xyz, 5 Oct. 2026, https://4ort.xyz/entity/iron-ii-oxide.
BibTeX @misc{4ortxyz_iron-ii-oxide_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{iron(II) oxide}}, year = {2026}, url = {https://4ort.xyz/entity/iron-ii-oxide}, note = {Accessed: 2026-10-05}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): iron(II) oxide — https://4ort.xyz/entity/iron-ii-oxide (retrieved 2026-10-05)

Canonical URL: https://4ort.xyz/entity/iron-ii-oxide · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 10d ago · KrBot bot · 2026-09-26 view diff on Wikidata ↗
    Zvg number → 1190
    "/* wbsetclaimvalue:1| */ [[Property:P679]]: 1190, см. / see [[Template:Autofix|autofix]] на / on [[Property talk:P679]]"
  2. 13d ago · Mrwdat3 · 2026-09-23 view diff on Wikidata ↗
    Has part(s) → —
    Zvg number → 1190
    Standard enthalpy of formation → {'amount': '+251.04'}, {'amount': '-249.53'}, {'amount': '-272.04'}
    Has part(s) of the class → oxygen, iron
    + 2 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P679]]: 001190, [[:toollabs:quickstatements/#/batch/275042|batch #275042]]"
  3. 6w ago · Baum64 · 2026-08-23 view diff on Wikidata ↗
    Has part(s) → —
    Has part(s) of the class → oxygen, iron
    "/* wbcreateclaim-create:1| */ [[Property:P2670]]: [[Q629]], [[:toollabs:quickstatements/#/batch/269324|batch #269324]]"
  4. 7w ago · Baum64 · 2026-08-18 view diff on Wikidata ↗
    Crystal system → face-centered cubic
    Cod id → 9009766
    Space group → space group Fm-3m
    "/* wbcreateclaim-create:1| */ [[Property:P9824]]: 9009766, [[:toollabs:quickstatements/#/batch/269136|batch #269136]]"
  5. 14w ago · A121008 · 2026-06-30 view diff on Wikidata ↗
    Great norwegian encyclopedia id → jern(II)oksid
    "/* wbsetclaim-create:2||1 */ [[Property:P4342]]: jern(II)oksid"
  6. 15w ago · Nabbegat · 2026-06-19 view diff on Wikidata ↗
    Density → {'amount': '+6.0'}
    Unii → G7036X8B5H
    Local thumb → —
    Has parts → —
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-short:0||tr */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/37300|batch #37300]]"
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