KYbSiS4 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 7-coordinate geometry to three equivalent S(1) and four equivalent S(3) atoms. Yb(1) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(2), and four equivalent S(3) atoms. Si(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent K(1), one Yb(1), and one Si(1) atom to form a mixture of corner and edge-sharing SK3YbSi trigonal bipyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to three equivalent Yb(1) and one Si(1) atom. In the third S site, S(3) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent Yb(1), and one Si(1) atom.
KYbSiS4 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 7-coordinate geometry to three equivalent S(1) and four equivalent S(3) atoms. There are two shorter (3.17 Å) and one longer (3.23 Å) K(1)-S(1) bond length. There are two shorter (3.34 Å) and two longer (3.35 Å) K(1)-S(3) bond lengths. Yb(1) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(2), and four equivalent S(3) atoms. The Yb(1)-S(1) bond length is 2.80 Å. There is one shorter (2.87 Å) and two longer (2.97 Å) Yb(1)-S(2) bond lengths. There are two shorter (2.95 Å) and two longer (2.96 Å) Yb(1)-S(3) bond lengths. Si(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. The Si(1)-S(1) bond length is 2.07 Å. The Si(1)-S(2) bond length is 2.08 Å. Both Si(1)-S(3) bond lengths are 2.16 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent K(1), one Yb(1), and one Si(1) atom to form a mixture of corner and edge-sharing SK3YbSi trigonal bipyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to three equivalent Yb(1) and one Si(1) atom. In the third S site, S(3) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent Yb(1), and one Si(1) atom.