portlandite

calcium hydroxide mineral
ChemicalSubstance mineral_species Q301805
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portlandite

Summary

portlandite is a mineral species[1]. portlandite draws 15 Wikipedia views per month (mineral_species category, ranking #149 of 1,431).[2]

Key Facts

  • portlandite's instance of is recorded as mineral species[3].
  • portland cement is named after portlandite[4].
  • portlandite's chemical formula is recorded as Ca(OH)₂[5].
  • portlandite is a type of brucite mineral group[6].
  • portlandite's Commons category is recorded as Portlandite[7].
  • portlandite's streak color is recorded as white[8].
  • portlandite's crystal system is recorded as trigonal crystal system[9].
  • portlandite's IMA status and/or rank is recorded as grandfathered mineral (G)[10].
  • portlandite's point group is recorded as ditrigonal scalahedral[11].
  • portlandite's space group is recorded as space group P-3m1[12].
  • portlandite's Strunz 8th edition is recorded as IV/F.03[13].
  • portlandite's Nickel-Strunz 9th edition is recorded as 4.FE.05[14].
  • portlandite's Nickel-Strunz '10th ed', review of is recorded as 4.FE.05[15].
  • portlandite's Mohs' hardness is recorded as {'amount': '+2.0'}[16].
  • portlandite's described by source is recorded as Portlandite, a new mineral from Scawt Hill, Co. Antrim[17].
  • portlandite's density is recorded as {'amount': '+2295.85'}[18].
  • portlandite's type locality is recorded as Scawt Hill[19].
  • portlandite's Poisson's ratio is recorded as {'amount': '+0.253'}[20].
  • portlandite's bulk modulus is recorded as {'amount': '+35543000000.0'}[21].
  • portlandite's shear modulus is recorded as {'amount': '+21012000000.0'}[22].
  • portlandite's IMA Mineral Symbol is recorded as Por[23].

Why It Matters

portlandite draws 15 Wikipedia views per month (mineral_species category, ranking #149 of 1,431).[2] portlandite has Wikipedia articles in 11 language editions, a strong signal of global cultural recognition.[24] portlandite is known by 9 alternative names across languages and contexts.[25]

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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [24] ↑ . Wikidata sitelinks. wikidata.org.
  3. [25] ↑ . 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). portlandite. Retrieved October 4, 2026, from https://4ort.xyz/entity/portlandite
MLA “portlandite.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/portlandite.
BibTeX @misc{4ortxyz_portlandite_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{portlandite}}, year = {2026}, url = {https://4ort.xyz/entity/portlandite}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): portlandite — https://4ort.xyz/entity/portlandite (retrieved 2026-10-04)

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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. 4w ago · Baum64 · 2026-09-02 view diff on Wikidata ↗
    Mohs' hardness → {'amount': '+2.0'}
    "/* wbcreateclaim-create:1| */ [[Property:P1088]]: 2.0, [[:toollabs:quickstatements/#/batch/270249|batch #270249]]"
  2. 6w ago · Baum64 · 2026-08-23 view diff on Wikidata ↗
    Bulk modulus → {'amount': '+35543000000.0'}
    Poisson's ratio → {'amount': '+0.253'}
    Shear modulus → {'amount': '+21012000000.0'}
    Point group → ditrigonal scalahedral
    "/* wbcreateclaim-create:1| */ [[Property:P589]]: [[Q13362471]], [[:toollabs:quickstatements/#/batch/269342|batch #269342]]"
  3. 7w ago · Baum64 · 2026-08-17 view diff on Wikidata ↗
    Streak color → white
    Cod id → 7020138
    Density → {'amount': '+2295.85'}
    "/* wbcreateclaim-create:1| */ [[Property:P9824]]: 7020138, [[:toollabs:quickstatements/#/batch/269092|batch #269092]]"
  4. 7w ago · Cipintina · 2026-08-15 view diff on Wikidata ↗
    Crystal system → trigonal crystal system
    Named after → —
    Described by source → Portlandite, a new mineral from Scawt Hill, Co. Antrim
    Subclass of → —
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ [[Property:P690]]: [[Q15040832]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.