Abstract: | The Crystal Structure of K2S3 and K2Se3 Well formed crystals of K2S3 and K2Se3 were obtained by reaction of the elements in liquid ammonia at 500 bar and 150°C. The substances are both orthorhombic, space group Cmc21. Cell constants are: The structure contains S32?(Se32?) polyanions, with S? S? S(Se? Se? Se) angles of 105.4(102.5)°. The S? S(Se? Se) distance is 2.083(2.383) Å. |