Where it forms, where it's found
- Geological setting
hydration–oxidation weathering of uraninite in the presence of solutions with dissolved CO2 that can originate from various sources
- Type locality
- Kamoto East Open cut
- Kamoto
- Mutshatsha
- Lualaba
- DR Congo
-10.7191°, 25.4180°
1recorded occurrences
Radioactivity
Physical
Optical
- UV response
- Pendevilleite-(Y) is non-fluorescent in both SW and LW ultraviolet light.
- Notes
No optical properties were determined due to the minimal size of the crystals and complicated intergrowths. A mean index of refraction, calculated based on Gladston-Dale equations, is nGD = 1.47.
Crystallography
- Cell parameters
- a = 11.9130(3) Å · b = 13.5252(11) Å · c = 16.1531(3) Å
- Cell angles
- α = 107.052(3) ° · β = 92.7765(19) ° · γ = 109.676(4) °
- Ratio a:b:c
- 1 : 1.135 : 1.356
- Z
- 2
- Type-locality form
occurs as extremely thin blades (up to about 0.08–0.10 mm in length and only about 1 μm thick), often forming lichen-like aggregates and crusts
Chemical composition
Synonyms
- IMA2022-054
- Pendevilleiet-(Y)
In other languages
- German
- IMA 2022-054 · Pendevilleit-(Y)
Classification
Strunz
10th ed.5.ED
- 5CarbonatesClass
- 5.EUranyl CarbonatesDivision
- 5.EDUO2:CO3 = 1:3Group
- 5.EDPendevilleite-(Y)Species
Literature, links & citation
Citations
- 2022Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 69. European Journal of Mineralogy, 34 (5) 463-468 doi:10.5194/ejm-34-463-2022 DOI: 10.5194/ejm-34-463-2022
- 2026Plášil, Jakub; Steciuk, Gwladys; Škoda, Radek; Philippo, Simon; Guennou, Mael (2026) Extending the mineralogy of U6+ (III.): Pendevilleite-(Y), a new uranyl carbonate mineral from Kamoto-East Open-Cut, Democratic Republic of Congo. Mineralogical Magazine, 90 (1). 150-163 doi:10.1180/mgm.2025.10095DOI: 10.1180/mgm.2025.10095
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Pendevilleite-(Y) — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/pendevilleite-y-470410},
note = {Accessed 2026-05-11}
}