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Figure 4
Comparison of average flamite structure with that of β-K2SO4 (standard Pnma setting, view along pseudohexagonal a axis). Balls represent cation sites [(Ca,Na,K) for flamite, K for β-K2SO4], tetrahedra – anions [(Si,P)O4 for flamite, SO4 for β-K2SO4]. Hereafter, visualizations of crystal structures are prepared using VESTA software (Momma & Izumi, 2011 ![]() |