Where it forms, where it's found
- Geological setting
Contact zone between dolomite carbonatite and “jacupirangite” (=a pyroxenite)
- Type locality
- Jacupiranga mine
- Cajati
- São Paulo
- Brazil
-24.6983°, -48.1259°
1recorded occurrences
Physical
Optical
- Optical type
- Isotropic
- UV response
- None
- Notes
n>1.93(meas), calculated = 2.034
PPL intrinsic colour; no change on stage rotation
XPL extinct at every orientation
Crystallography
- Space group
- #203
- Cell parameters
- a = 13.017(1) Å
- Z
- 2
- Type-locality form
Rhombododecahedra up to 1 mm, isolated or in aggregates.
Crystal structure
Chemical composition
Synonyms
- IMA2005-023
- Menezesiet
In other languages
- German
- IMA 2005-023 · Menezesit
- Portuguese
- IMA2005-023 · Menezesita
Classification
Strunz
10th ed.4.FN.05
- 4OxidesClass
- 4.FHydroxides (without V or U)Division
- 4.FNHydroxides with H2O±(OH); frameworks of corner and/or face-sharing octahedraGroup
- 4.FN.05MenezesiteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 2006Atencio, D., Couthino, J.M.V., Doriguetto, A.C., Mascarenhas, Y.P., Ellena, J.A., Ferrari, V.C. (2006) Menezesite from Cajati, São Paulo, Brazil: The first heteropolyniobate mineral. 19th General Meeting of the International Mineralogical Association, IMA2006, 299pp.
- 2008Atencio, D., Coutinho, J. M.V., Doriguetto, A. C., Mascarenhas, Y. P., Ellena, J., Ferrari, V. C. (2008) Menezesite, the first natural heteropolyniobate, from Cajati, Sao Paulo, Brazil: Description and crystal structure. American Mineralogist, 93 (1) 81-87 doi:10.2138/am.2008.2536 DOI: 10.2138/am.2008.2536
- 2021(2021) Menezesite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Menezesite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/menezesite-27607},
note = {Accessed 2026-05-11}
}