European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 38, issue 4
Articles | Volume 38, issue 4
https://doi.org/10.5194/ejm-38-373-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-38-373-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 4
New minerals, nomenclature, and classification
 | 
07 Jul 2026
New minerals, nomenclature, and classification |  | 07 Jul 2026

Yttrotungstite-(Nd), a new mineral species from the Nyakabingo tungsten mine, Kigali, Rwanda

Frédéric Hatert, Simon Philippo, Pietro Vignola, and Maël Guennou

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Cited articles

Bosi, F., Hatert, F., Pasero, M., and Mills, S. J.: IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 76, Eur. J. Mineral., 35, 1073–1078, https://doi.org/10.5194/ejm-35-1073-2023, 2023. 
Bosi, F., Hatert, F., Pasero, M., and Mills, S. J.: IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 91, European Journal of Mineralogy, in press, 2026. 
Burnham, C. W.: LCLSQ version 8.4, least-squares refinement of crystallographic lattice parameters, Department of Earth & Planetary Sciences, Harvard University, 24 pp., 1991. 
Davis, R. J. and Smith, G. W.: Yttrotungstite, Mineral. Mag., 38, 261–285, 1971. 
De Clercq, F., Muchez, P., Dewaele, S., and Boyce, A.: The tungsten mineralisation at Nyakabingo and Gifurwe (Rwanda): Preliminary results, Geol. Belg., 11, 251–258, 2008. 
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Yttrotungstite-(Nd) is a new mineral species discovered in the Nyakabingo tungsten mine, Kigali, Rwanda. The mineral occurs in the oxidized zones of the deposit, where it forms tiny yellow-orange tabular crystals that reach a length of maximum of 100 µm, and frequently form radiated groups. The dominant form is {010}, and a twinning has been observed parallel to (001). Electron microprobe analyses and structural data, confirming that the species belongs to the yttrotungstite group.
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