Where it forms, where it's found
- Geological setting
Occurs along joints in granite porphyry.
- Type locality
- Oktyabr'skoye U Deposit
- Kyzyltyube-Sai
- Khodzhent (Leninabad)
- Sughd
- Tajikistan
1recorded occurrences
Radioactivity
Physical
Optical
- Pleochroism
- Weak
X = pale green; Z = green.
- Extinction
- Parallel. Elongation positive.
- UV response
- Fluorescent in greenish yellow under ultraviolet light.
Crystallography
- Type-locality form
Lemon-yellow earthy or nodular incrustations, rarely radiating spherulites.
- Comment
Poorly defined crystallography
Chemical composition
Synonyms
- Magnioursiliet
In other languages
- German
- Magnioursilit
- Italian
- magnioursilite
Classification
Strunz
10th ed.9.AK.35
- 9SilicatesClass
- 9.ANesosilicatesDivision
- 9.AKUranyl neso- and polysilicatesGroup
- 9.AK.35MagnioursiliteSpecies
Literature, links & citation
Citations
- 1957Chernikov A A, Krutetskaya O V, Sidelnikova V D (1957): Ursilite - a new silicate of uranium. Atomnaya Energiya Voprosy Geologii Urana, Supplement 6, 73-77 (in Russian).
- 1958Proc. 2nd U.N. Int. Conf. on the Peaceful Uses of Atomic Energy, 2: 298-299 (1958)
- 1959Proc. 2nd U.N. Int. Conf. on the Peaceful Uses of Atomic Energy, 3, 174-177 (1959)
- 1977Chernikov, A.A., Sidorenko, G.A., Valueva, A.A. (1977) New data on uranyl minerals of the ursilite-weeksite group (in Russian). Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 106(5), 553-564.
- 2018Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter No 43, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (3) 779-785 doi:10.1180/mgm.2018.72DOI: 10.1180/mgm.2018.72
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Magnioursilite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/magnioursilite-11332},
note = {Accessed 2026-05-11}
}