KCr ( SO 4 ) 2 ⋅ 12 H 2 O KCr ( SO 4 ) 2 ⋅ 12 H 2 O [ Cd { SC ( NH 2 ) 2 } 2 ] ⋅ [ Cr ( SCN ) 4 ( NH 3 ) 2 ] 2 RNO 2 − ⋅ μ - Cl