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Crystal structure of raite. (A) Down the c-axis: triangles, SiO4 tetrahedra; white octahedra, Mn; shaded octahedra, Na. (B) SiO4 layer projected down a, at z ≈ 0. (C) Mn and Na polyhedra down a; the Ti octahedron (dotted) has one-ninth occupancy.
