Where it forms, where it's found
- Type locality
- Le Cetine di Cotorniano mine
- Chiusdino
- Siena Province
- Tuscany
- Italy
43.2320°, 11.1683°
4recorded occurrences
Physical
Optical
- UV response
- shows a bluish-white fluorescence under shortwave UV radiation (λ=254 nm) and a yellowish-white fluorescence under longwave UV radiation (λ=350 nm).
- Notes
The mean refractive index, calculated according to the Gladstone–Dale relationship, is 1.564.
Crystallography
- Space group
- #14
- Cell parameters
- a = 8.688(3) Å · b = 5.024(2) Å · c = 9.734(4) Å
- Cell angles
- β = 90.77(2) °
- Ratio a:b:c
- 1 : 0.578 : 1.120
- Z
- 4
- Type-locality form
occurs as (hemi-)spherical aggregates, up to 1 mm in diameter, formed by spindle-like crystals or tabular individuals.
- Comment
P21/n
Crystal structure
Chemical composition
Synonyms
- IMA2024-010
- Nannoniiet
- UM1990-28-OHF:Al
In other languages
- German
- Nannoniit
Classification
Strunz
10th ed.4.FE
- 4OxidesClass
- 4.FHydroxides (without V or U)Division
- 4.FEHydroxides with OH, without H2O; sheets of edge-sharing octahedraGroup
- 4.FENannoniiteSpecies
Literature, links & citation
Citations
- 1968Sabina, Ann P., Jambor, John L., Plant, A. G. (1968) Weloganite, a new strontium zirconium carbonate from Montreal Island, Canada. The Canadian Mineralogist, 9 (4) 468-477
- 1990Jambor, John L.; Sabina, Ann P.; Ramik, Robert A.; Sturman, B. Drako (1990) A fluorine-bearing gibbsite-like mineral from the Francon quarry, Montreal, Quebec. The Canadian Mineralogist, 28 (1). 147-153
- 2024Biagioni, C., Mugnaioli, E., Lorenzon, S., Mauro, D., Musetti, S., Sejkora, J., Belmonte, D., Demitri, N., Dolnı́ček, Z. (2024) Nannoniite, Al₂(OH)₅F, a new mineral from the Cetine di Cotorniano mine (Tuscany, Italy). European Journal of Mineralogy, 36 (6). 1011-1022 doi:10.5194/ejm-36-1011-2024DOI: 10.5194/ejm-36-1011-2024
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Nannoniite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/nannoniite-471229},
note = {Accessed 2026-05-11}
}