Tancaite-(Ce), ideally FeCe(MoO4)3 &#9679; 3H2O: description and average crystal structure

Bonaccorsi, Elena; Orlandi, Paolo

doi:https://doi.org/10.5194/ejm-32-347-2020

Articles | Volume 32, issue 3

Eur. J. Mineral., 32, 347–354, 2020

https://doi.org/10.5194/ejm-32-347-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Eur. J. Mineral., 32, 347–354, 2020

https://doi.org/10.5194/ejm-32-347-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 32, issue 3

Research article 08 Jun 2020

Research article | 08 Jun 2020

Tancaite-(Ce), ideally FeCe(MoO₄)₃ ● 3H₂O: description and average crystal structure

Elena Bonaccorsi and Paolo Orlandi

Data sets

Tancaite-(Ce) data set E. Bonaccorsi, and P. Orlandi https://doi.org/10.6084/m9.figshare.12319214

Short summary

Molybdates are of a great interest due to their ionic conductivity, negative thermal expansion, and immobilization of radionuclides. The new mineral tancaite-(Ce), FeCe(MoO₄)₃•3H₂O, shows a new structure type never observed in natural and synthetic molybdates. Its cubic average structure may be described as a derivative of the perovskite structure, in which Fe-centred octahedra are linked through MoO₄ groups. The ordering of Mo and O atoms results in one or more complex superstructures.