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The crystal structure of Ni-rich gordaite–thérèsemagnanite from Cap Garonne, France
journal contributionposted on 2023-05-21, 15:50 authored by Mills, SJ, Owen MissenOwen Missen, Favreau, G
The crystal structure of Ni-rich gordaite–thérèsemagnanite has been determined from a sample collected at pillar 80 in the North mine, Cap Garonne, Var, France. The structure was refined to R1 = 0.0693 for 935 reflections with I > 2σ(I). The mineral is isostructural with gordaite, forming a layered structure with an extensive hydrogen-bonding network. The possible polytypic relationship between gordaite, thérèsemagnanite and guarinoite is also discussed. The guarinoite formula (Zn,Co,Ni)6(SO4)(OH,Cl)10·5H2O is also likely to be incorrect and is more likely to be Na(Zn,Co)4(SO4)(OH)6Cl·5–6H2O, meaning that guarinoite is equivalent to Co-rich gordaite-2H and would not be a distinct mineral species.
Publication titleMineralogical Magazine
Pagination459 - 463
Department/SchoolSchool of Natural Sciences
Place of publicationGermany
Rights statement© Mineralogical Society of Great Britain and Ireland 2019.