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As(S)24(I)3 crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three arsenic molecules, nine hydriodic acid molecules, and nine octasulfur molecules.
Ce3La9Si8(S8I)4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Ce3+ sites. In the first Ce3+ site, Ce3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of Ce–S bond distances ranging from 2.95–3.16 Å. The Ce–I bond length is 3.55 Å. In the second Ce3+ site, Ce3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of Ce–S bond distances ranging from 2.95–3.17 Å. The Ce–I bond length is 3.56 Å. In the third Ce3+ site, Ce3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of Ce–S bond distances ranging from 2.96–3.16 Å. The Ce–I bond length is 3.56 Å. There are nine inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.98–3.15 Å. The La–I bond length is 3.54 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.98–3.15 Å. The La–I bond length is 3.54 Å. In the third La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.97–3.15 Å. The La–I bond length is 3.54 Å. In the fourth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.99–3.14 Å. The La–I bond length is 3.53 Å. In the fifth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.98–3.14 Å. The La–I bond length is 3.53 Å. In the sixth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.96–3.32 Å. The La–I bond length is 3.35 Å. In the seventh La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.96–3.33 Å. The La–I bond length is 3.35 Å. In the eighth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.96–3.34 Å. The La–I bond length is 3.35 Å. In the ninth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight S2- and one I1- atom. There are a spread of La–S bond distances ranging from 2.96–3.34 Å. The La–I bond length is 3.35 Å. There are eight inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are three shorter (2.13 Å) and one longer (2.15 Å) Si–S bond lengths. In the second Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.12–2.15 Å. In the third Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are three shorter (2.13 Å) and one longer (2.15 Å) Si–S bond lengths. In the fourth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are three shorter (2.13 Å) and one longer (2.15 Å) Si–S bond lengths. In the fifth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.12–2.15 Å. In the sixth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of Si–S bond distances ranging from 2.12–2.15 Å. In the seventh Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are three shorter (2.13 Å) and one longer (2.15 Å) Si–S bond lengths. In the eighth Si4+ site, Si4+ is bonded in a tetrahedral geometry to four S2- atoms. There are three shorter (2.13 Å) and one longer (2.15 Å) Si–S bond lengths. There are thirty-two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to two Ce3+, one La3+, and one Si4+ atom. In the second S2- site, S2- is bonded in a 4-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the third S2- site, S2- is bonded in a 4-coordinate geometry to two Ce3+, one La3+, and one Si4+ atom. In the fourth S2- site, S2- is bonded in a 4-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the fifth S2- site, S2- is bonded in a 4-coordinate geometry to three La3+ and one Si4+ atom. In the sixth S2- site, S2- is bonded in a 4-coordinate geometry to three La3+ and one Si4+ atom. In the seventh S2- site, S2- is bonded in a 4-coordinate geometry to three La3+ and one Si4+ atom. In the eighth S2- site, S2- is bonded in a 4-coordinate geometry to three La3+ and one Si4+ atom. In the ninth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one Ce3+, two La3+, and one Si4+ atom. In the tenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three La3+ and one Si4+ atom. In the eleventh S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one Ce3+, two La3+, and one Si4+ atom. In the twelfth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one Ce3+, two La3+, and one Si4+ atom. In the thirteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to two Ce3+, one La3+, and one Si4+ atom. In the fourteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one Ce3+, two La3+, and one Si4+ atom. In the fifteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to two Ce3+, one La3+, and one Si4+ atom. In the sixteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to one Ce3+, two La3+, and one Si4+ atom. In the seventeenth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the eighteenth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the nineteenth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twentieth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-first S2- site, S2- is bonded in a 1-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the twenty-second S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-third S2- site, S2- is bonded in a 1-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the twenty-fourth S2- site, S2- is bonded in a 1-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the twenty-fifth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-sixth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-seventh S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-eighth S2- site, S2- is bonded in a 1-coordinate geometry to three La3+ and one Si4+ atom. In the twenty-ninth S2- site, S2- is bonded in a 1-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. In the thirtieth S2- site, S2- is bonded in a 1-coordinate geometry to two Ce3+, one La3+, and one Si4+ atom. In the thirty-first S2- site, S2- is bonded in a 1-coordinate geometry to two Ce3+, one La3+, and one Si4+ atom. In the thirty-second S2- site, S2- is bonded in a 1-coordinate geometry to one Ce3+, two La3+, and one Si4+ atom. There are four inequivalent I1- sites. In the first I1- site, I1- is bonded in a 3-coordinate geometry to three La3+ atoms. In the second I1- site, I1- is bonded in a 3-coordinate geometry to three La3+ atoms. In the third I1- site, I1- is bonded in a 1-coordinate geometry to two Ce3+ and one La3+ atom. In the fourth I1- site, I1- is bonded in a 3-coordinate geometry to one Ce3+ and two La3+ atoms.