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Xanthoxenite
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Xanthoxenite is a rare calcium iron(III) phosphate mineral with formula: Ca₄Fe³⁺₂(PO₄)₄(OH)₂·3H₂O. It occurs as earthy pale to brownish yellow incrustations and lath shaped crystals. It crystallizes in the triclinic crystal system. It occurs as an... Wikipedia
Crystal class: Pinacoidal (1); (same H-M symbol)
Crystal habit: Occurs as platy crystals and as lamellar aggregates and crusts
Crystal system: Triclinic