BING-1 [tetrasodium tetratin tris(oxalate) hexafluoride] was synthesized so
lvothermally at 423 K and crystallized in the triclinic system, with the P
(1) over bar space group. The asymmetric unit consists of two types of tin(
II) centres, connected by oxalate groups. The Sn atoms are also bonded to f
luoride ions, which bond the tin oxalate layers together via interlayer Na
atoms, to define a three-dimensional framework.