Where it forms, where it's found
- Type locality
- Ercolano
- Metropolitan City of Naples
- Campania
- Italy
43recorded occurrences
Physical
Optical
- Optical type
- Biaxial (+/-) · 2V measured = 32° · 2V calc = 36°
- Refractive index
- 1.478 – 1.49
- Principal indices
- nα 1.478 – 1.485 · nβ 1.48 – 1.4895 · nγ 1.48 – 1.49
- Dispersion
- none
Δ = 0Δmax
PPLpleochroism per grain
XPLindependent extinctions · rotate the stage
PPLpleochroism only · colour blends on rotation
XPLinterference colour · extinct every 90°
Retardation35 nm
Order1st order
XPL colour
Crystallography
- Space group
- #99
- Cell parameters
- a = 13.831 Å · c = 15.023 Å
- Comment
Data from Yakubovic et al. (2005) (193 K).
Crystal structure
Chemical composition
Synonyms
- Chabasita-K
- Chabasite-K
In other languages
- German
- Chabasit-K
- Italian
- cabasite-K · Chabazite-K
Classification
Strunz
10th ed.9.GD.10
- 9SilicatesClass
- 9.GTektosilicates with zeolitic H2O; zeolite familyDivision
- 9.GDChains of 6-membered rings – tabular zeolitesGroup
- 9.GD.10Chabazite-KSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 1970Passaglia, Elio (1970) The crystal chemistry of chabazites. American Mineralogist, 55 (7-8) 1278-1301
- 1982Alberti, A., Galli, E., Vezzalini, G., Passaglia, E., Zanazzi, P.F. (1982) Position of cations and water molecules in hydrated chabazite. Natural and Na-, Ca-, Sr- and K-exchanged chabazites. Zeolites, 2 (4) 303-309 doi:10.1016/s0144-2449(82)80075-4DOI: 10.1016/s0144-2449(82)80075-4
- 1983Mazzi, F., Galli, E. (1983) The tetrahedral framework of chabazite. Neues Jahrbuch für Mineralogie - Monatshefte, 1983. 461-480
- 1997Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, et al. (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6). 1571-1606
- 2003Neuhoff, Philip S., Stebbins, Jonathan F., Bird, Dennis K. (2003) Si-Al disorder and solid solutions in analcime, chabazite, and wairakite. American Mineralogist, 88 (2) 410-423 doi:10.2138/am-2003-2-317DOI: 10.2138/am-2003-2-317
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Chabazite-K — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/chabazite-k-6855},
note = {Accessed 2026-05-11}
}