| By exposure of the tetrasulphide crystals to the air, red crystals of an oxysulphide, SrO.SrS4.12H2O, are obtained. Geuther, however, regarded them as mixed crystals of strontium thiosulphate and an otherwise unknown disulphide. By the action of sulphuretted hydrogen on strontium oxide the compound 2SrS.SrO is formed. |