Article (Scientific journals)
Supergene uranyl mineralization of the rabejac deposit, Lodève, France
Dal Bo, Fabrice; Hatert, Frédéric; Philippo, S.
2018In Minerals, 8 (9)
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Keywords :
Autunite group; Crystal structure; EMPA; Mineral evolution; Single-crystal X-ray; Uranyl minerals
Abstract :
[en] The Rabejac uranium deposit that is located in the Lodève region, France, is the type locality for three uranyl minerals species (fontanite, seelite, and rabejacite). In addition, this deposit shows an extraordinary supergene uranyl mineralization characterized by the presence of many rare secondary uranyl species. In the present study, a mineralogical description as well as new chemical and crystallographic data are reported on (meta)zeunerite, (meta)nováčekite, (meta)uranospinite, heinrichite, nováčekite-I, arsenuranospathite, umohoite, calcurmolite, becquerelite, billietite, and liebigite. The chemical data indicate that the arsenate members of the autunite/meta-autunite group incorporate a significant amount of phosphorus. Moreover, the uranospinite samples usually exhibit high Mg content, thus moving toward the nováčekite end-member composition. The refined unit-cell parameters for all of the investigated mineral species are in agreement with the previous data reported in the literature. Finally, a model describing the alteration of the primary uraninite and the formation of secondary uranyl minerals is proposed in agreement with the observed mineral assemblages. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Dal Bo, Fabrice ;  Université de Liège - ULiège > Département de géologie > Minéralogie et cristallochimie
Hatert, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Minéralogie et cristallochimie
Philippo, S.;  Section Minéralogie, Musée d’Histoire Naturelle, Rue Münster 25, Luxembourg, 2160, Luxembourg
Language :
English
Title :
Supergene uranyl mineralization of the rabejac deposit, Lodève, France
Publication date :
2018
Journal title :
Minerals
eISSN :
2075-163X
Publisher :
MDPI AG
Volume :
8
Issue :
9
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 March 2020

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