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The structure of a second crystal polymorph of silver(I) 2,6-dihydroxybenzoate, [Ag 2 ((OH) 2  · C 6 H 3 COO) 2 ]  n   has been determined by X-ray diffraction and refined to a residual  R  = 0.036 for 1332 observed reflections. Crystals are monoclinic, space group  P 2 1 / n  with two dimeric units in a cell of dimensions  a  = 7.090(1),  b  = 11.693(2),  c  = 8.164(1)Å,  β  = 90.58(1)°. As in the first reported polymorph, the structure contains centrosymmetric bis(carboxylato- O , O ′) bridged silver dimers. In the present structure, the dimers are cross-linked  via  Ag–O (hydroxyl) bonds [2.607(3)Å] to form a sheet polymer, whereas those in the earlier structure are discrete. Chelate-ring dimensions are essentially unchanged [Ag–O, 2.220, 2.236(3) cf. 2.203, 2.240(4)Í; Ag–Ag, 2.926(1) cf. 2.910(1)Å].