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Figure 1
A view of the asymmetric unit of Ba2Ti2Si2O9F2, showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. Symmetry-related atoms have been added to show the octahedral environments of atoms Ti1 and Ti2. [Symmetry codes: (ii) −x + ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |