| This compound and the corresponding potassium vanadyl thiocyanate are obtained in blue, isomorphous, rhombic crystals by the addition of ammonium or potassium thiocyanate, as the case may be, to a neutral solution of vanadyl sulphate, VOSO4. Their compositions are 2NH4SCN.VO(SCN)2.5H2O and 2KSCN.VO(SCN)2.5H2O. Neither the corresponding sodium compound nor the free vanadyl thiocyanate, VO(CNS)2, has been isolated, but a violet-red bismuth vanadyl thiocyanate, 2Bi(SCN)3.3VO(SCN)2.7H2O or (VO)3[Bi(SCN)6]2.7H2O, has recently been prepared. |