Where it forms, where it's found
- Geological setting
In annealed and fused marl associated with the combustion of hydrocarbons.
11recorded occurrences
Physical
- Transparency
- Transparent
- Cleavage
(001) readily observed in thin section
Crystallography
- Space group
- C2/c
- Cell parameters
- a = 6.83556(10) Å · b = 11.86962(18) Å · c = 19.6255(3) Å
- Cell angles
- α = 90 ° · β = 90.6805(13) ° · γ = 90 °
- Ratio a:b:c
- 1 : 1.736 : 2.871
- Unit cell volume
- 1592.22 ų
- Z
- 8
- Morphology
Platy on (001)
- Twinning
Polysynthetic, presumably || structural layers (001)
- Comment
Strongly pseudohexagonal metric; data is for 4M polytype (2M and 6-layer polytypes also known for synthetic analogue)
Crystal structure
Chemical composition
Synonyms
- Bourgeoisit
- Bourgeoisita
- Bourgeoisite
- Cyclowollastonita
- Cyclowollastonite
- Pseudowollastonita
- ß-Wollastonit
- ß-Wollastonita
- ß-Wollastonite
In other languages
- French
- Pseudowollastonite
- German
- Bourgeoisit · Cyclowollastonit · Pseudowollastonit · ß-Wollastonit · Wollastonit-4A
- Italian
- pseudowollastonite
Classification
Strunz
10th ed.9.CA.20
- 9SilicatesClass
- 9.CCyclosilicatesDivision
- 9.CA[Si3O9]6- 3-membered single rings (dreier-Einfachringe), without insular complex anionsGroup
- 9.CA.20PseudowollastoniteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- —Dera, P., Rapp, R., Chornkrathok, S., Zhang, D., Prakapenka, V.B., Woźniak, K. (2023). New high-pressure phase of CaSiO3 wollastonite with penta-coordinated silicon. 9th Meeting of the Mineralogical Society of Poland / 28th Meeting of the Petrology group of the Mineralogical Society of Poland, "Oceanic lithosphere: rocks, minerals, and critical resources", October 19-22, Bielawa, Poland. Mineralogia - Special Papers, 51, 51.
- 1932McLintock, W. F. P. (1932) On the Metamorphism Produced by the Combustion of Hydrocarbons in the Tertiary Sediments of South-West Persia. Mineralogical Magazine, 23 (139). 207-226 doi:10.1180/minmag.1932.023.139.01 DOI: 10.1180/minmag.1932.023.139.01
- 1958TOLLIDAY, JOAN (1958) Crystal Structure of β-Wollastonite. Nature, 182 (4641). 1012-1013 doi:10.1038/1821012a0DOI: 10.1038/1821012a0
- 1973Fleischer, Michael (1973) New mineral names. American Mineralogist, 58 (5-6). 560-562
- 1977Gross, S. (1977) The mineralogy of the Hatrurim formation, Israel. Geological Survey of Israel, Bulletin 70: 1-80.
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Pseudowollastonite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/pseudowollastonite-9535},
note = {Accessed 2026-05-11}
}