Collected on Rigaku's RAPID II, the monoclinic crystals are twinned by a twin law that results in a 180° rotation about the c axis. The two components of this particular sample existed in an approx 80:20 ratio. The cadmium complex forms infinite chains along the b-axis; the Cd centers are bridged by SO₄ groups.

The twin components were indexed and integrated with the Rigaku TwinSolve package; the structure was refined using the twin-handling capabilities of SHELXL.