Abstract: | The title compound, [Na(C8H20BO4)]n, has twofold crystallographic symmetry, with the Na+ cations bound by four O atoms [Na—O = 2.251 (3) Å]. The tetraethoxyborate anion acts as a bridging ligand to form one‐dimensional polymers running along the twofold crystal axis. The crystal was treated as a racemic twin. |