Formula: (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3
Origin of name: for F. Rosemary Wyllie, wife of petrologist Peter J. Wyllie
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
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Cleavage: none
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Comments: series with wyllieite and with ferrowyllieite
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