when a hydroxide is added to a solution of a lead(ii) salt, a hydrated lead oxide pbo·xho (with x < 1) is obtained. careful hydrolysis of lead(ii) acetate solution yields a crystalline product with a formula 6pbo·2ho = pbo(oh). this material is a cluster compound, consisting of an octahedron of pb centers, each face of which is capped by an oxide or a hydroxide. the structure is reminiscent of the mos subunit of the chevrel phases.