Cirrolite

Ca3Al2(PO4)3(OH)3
IMA status
  • Approved
  • Grandfathered
  • Questionable
IMA symbol
Ci
Also known as
  • Cirroliet
  • Kirrolith

Where it forms, where it's found

2recorded occurrences
Source · OpenStreetMap

Physical

Hardness
123456789105 – 6/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Colour
Light yellow

Crystallography

Comment

No data on crystallography

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1515.999239.985
47.04%
20CaCalciumCalcium340.078120.234
23.57%
15PPhosphorusPhosphorus330.97492.922
18.22%
13AlAluminiumAluminium226.98253.964
10.58%
1HHydrogenHydrogen31.0083.024
0.59%
Total510.129100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • Cirroliet
  • Kirrolith

In other languages

German
Cirrolit
Italian
cirrolite

Classification

Strunz
10th ed.

8.BH.20

  • 8Phosphates, Arsenates, VanadatesClass
  • 8.BPhosphates, etc., with additional anions, without H2ODivision
  • 8.BHWith medium-sized and large cations, (OH,etc.):RO4 = 1:1Group
  • 8.BH.20CirroliteSpecies

Literature, links & citation

Citations
  1. 1868Dana, James D., Brush, George Jarvis (1868) A System of Mineralogy (5th ed.). p.882
  2. 1868Blomstrand, C. W. (1868) Om Vestanå Mineralier. Öfversigt af Kongl. vetenskaps-akademiens förhandlingar, 25. 197-212
  3. 1892Dana, Edward Salisbury; Dana, James Dwight (1892) A System of Mineralogy (6th ed.). John Wiley & Sons, Inc.
  4. 1951Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Cirrolite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/cirrolite-1053},
  note      = {Accessed 2026-05-11}
}