Vielleaureite-(Ce), a new epidote of the dollaseite group, coexisting with Mn-dominant hellandite in Mn deposits of the central Pyrenees

Ragu, Alain; Bindi, Luca; Bonazzi, Paola; Remusat, Laurent; Chopin, Christian

doi:https://doi.org/10.5194/ejm-37-627-2025

Articles | Volume 37, issue 5

https://doi.org/10.5194/ejm-37-627-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Celebrating the outstanding contribution of Paola Bonazzi...

https://doi.org/10.5194/ejm-37-627-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 37, issue 5

Research article

|

15 Sep 2025

Research article |

| 15 Sep 2025

Vielleaureite-(Ce), a new epidote of the dollaseite group, coexisting with Mn-dominant hellandite in Mn deposits of the central Pyrenees

Alain Ragu, Luca Bindi, Paola Bonazzi, Laurent Remusat, and Christian Chopin

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Latest update: 17 Sep 2025

Short summary

A new rare-earth-bearing silicate is described from a manganese ore deposit in the Pyrenees. It belongs to the epidote family and is characterised by the formula Mn²⁺Ce(MgAlMn²⁺)(Si₂O₇)(SiO₄)F(OH). This new mineral commonly contains inclusions of an Mn-rich yttrium borosilicate, a potentially new mineral of the hellandite family. This is a new type of occurrence for hellandite – while rare earths are under the spotlight.