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Figure 1
Coordination polyhedra around the metal atoms in Sr[SnF6]·2H2O with atom numbering. The almost octa­hedral [SnF6]2– anion (green, left) and the distorted square-anti­prismatic [SrF5(H2O)3] polyhedron (blue, right) are on the same scale with all non-H atoms drawn as displacement ellipsoids at the 50% probability level. Covalent bonds are drawn in bronze, coordinative bonds are drawn in grey; the black dot labelled i indicates the position of the centre of symmetry generating the dimers of the strontium coordination polyhedra. [Symmetry codes: (1) 1 − x,1 − y,1 − z; (2) Mathematical equation + x, Mathematical equation − y, −Mathematical equation + z; (3) Mathematical equation − x, Mathematical equation + y, Mathematical equation − z; (4) 1 − x, 2 − y, 1 − z; (5) −Mathematical equation + x, Mathematical equation − y, −Mathematical equation + z.]

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