K4Ba2SnP4 crystallizes in the monoclinic Cc space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one Sn(1), one P(1), one P(2), one P(3), and two equivalent P(4) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(3) atoms. In the third K site, K(3) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(2) atoms. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one P(1), one P(2), one P(3), and one P(4) atom. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to one P(1), one P(2), one P(3), and two equivalent P(4) atoms. In the second Ba site, Ba(2) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(2), and two equivalent P(3) atoms. Sn(1) is bonded in a distorted tetrahedral geometry to one K(1), one P(1), one P(2), one P(3), and one P(4) atom. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 8-coordinate geometry to one K(2), one K(3), one K(4), two equivalent K(1), two equivalent Ba(1), and one Sn(1) atom. In the second P site, P(1) is bonded in a 7-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one Ba(1), one Ba(2), and one Sn(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one K(1), one K(4), two equivalent K(3), one Ba(1), two equivalent Ba(2), and one Sn(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one K(1), one K(4), two equivalent K(2), one Ba(1), two equivalent Ba(2), and one Sn(1) atom.
K4Ba2SnP4 crystallizes in the monoclinic Cc space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one Sn(1), one P(1), one P(2), one P(3), and two equivalent P(4) atoms. The K(1)-Sn(1) bond length is 3.59 Å. The K(1)-P(1) bond length is 3.41 Å. The K(1)-P(2) bond length is 3.66 Å. The K(1)-P(3) bond length is 3.41 Å. There is one shorter (3.37 Å) and one longer (3.61 Å) K(1)-P(4) bond length. In the second K site, K(2) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(3) atoms. The K(2)-P(1) bond length is 3.50 Å. The K(2)-P(4) bond length is 3.24 Å. There is one shorter (3.27 Å) and one longer (3.29 Å) K(2)-P(3) bond length. In the third K site, K(3) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(2) atoms. The K(3)-P(1) bond length is 3.42 Å. The K(3)-P(4) bond length is 3.25 Å. There is one shorter (3.28 Å) and one longer (3.35 Å) K(3)-P(2) bond length. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one P(1), one P(2), one P(3), and one P(4) atom. The K(4)-P(1) bond length is 3.52 Å. The K(4)-P(2) bond length is 3.34 Å. The K(4)-P(3) bond length is 3.33 Å. The K(4)-P(4) bond length is 3.29 Å. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to one P(1), one P(2), one P(3), and two equivalent P(4) atoms. The Ba(1)-P(1) bond length is 3.42 Å. The Ba(1)-P(2) bond length is 3.29 Å. The Ba(1)-P(3) bond length is 3.51 Å. There is one shorter (3.29 Å) and one longer (3.54 Å) Ba(1)-P(4) bond length. In the second Ba site, Ba(2) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(2), and two equivalent P(3) atoms. The Ba(2)-P(1) bond length is 3.29 Å. There is one shorter (3.28 Å) and one longer (3.60 Å) Ba(2)-P(2) bond length. There is one shorter (3.29 Å) and one longer (3.49 Å) Ba(2)-P(3) bond length. Sn(1) is bonded in a distorted tetrahedral geometry to one K(1), one P(1), one P(2), one P(3), and one P(4) atom. The Sn(1)-P(1) bond length is 2.60 Å. The Sn(1)-P(2) bond length is 2.59 Å. The Sn(1)-P(3) bond length is 2.61 Å. The Sn(1)-P(4) bond length is 2.56 Å. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 8-coordinate geometry to one K(2), one K(3), one K(4), two equivalent K(1), two equivalent Ba(1), and one Sn(1) atom. In the second P site, P(1) is bonded in a 7-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one Ba(1), one Ba(2), and one Sn(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one K(1), one K(4), two equivalent K(3), one Ba(1), two equivalent Ba(2), and one Sn(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one K(1), one K(4), two equivalent K(2), one Ba(1), two equivalent Ba(2), and one Sn(1) atom.