Articles | Volume 36, issue 2
Research article
13 Mar 2024
Research article |  | 13 Mar 2024

Macraeite, [(H2O)K]Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10  ⋅  4H2O, a new monoclinic paulkerrite-group mineral, from the Cubos–Mesquitela–Mangualde pegmatite, Portugal

Ian E. Grey, Christian Rewitzer, Rupert Hochleitner, Anthony R. Kampf, Stephanie Boer, William G. Mumme, and Nicholas C. Wilson

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Crystal chemistry of type paulkerrite and establishment of the paulkerrite group nomenclature
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Cited articles

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Bosi, F., Hatert, F., Halenius, U., Pasero, M., Ritsuro, M., and Mills, S. J.: On the application of the IMA-CNMNC dominant-valency rule to complex mineral compositions, Mineral. Mag., 83, 627–632, 2019a. 
Bosi, F., Biagioni, C., and Oberti, R.: On the chemical identification and classification of minerals, Minerals, 9, 591,, 2019b. 
Demartin, F., Pilati, T., Gay, H. D., and Gramaccioli, C. M.: The crystal structure of a mineral related to paulkerrite, Z. Kristallogr., 208, 57–71, 1993. 
Short summary
Macraeite is the fourth type mineral to be described from the Mangualde pegmatite, Portugal, and is the first paulkerrite-group mineral to be characterised from the locality. Its crystal structure has been refined using synchrotron diffraction data, and its chemical analysis, Raman spectrum, and optical properties are reported.