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Figure 2 The Ca2+ cations with their oxygen neighbours, displayed with anisotropic displacement ellipsoids at the 70% probability level [Symmetry code: (ii) −x + y, −x, z; (v) 2/3-x + y, + y, − + z; (vi) + x, + x-y, + z; (vii) 1/3-x + y, − + y, + z; (viii) 2/3-y, 1/3-x, − + z; (x) 2/3-y, + x-y, − + z; (xi) 1/3-y, 2/3-y, + z.]. |