K5BaTaP4 crystallizes in the monoclinic Cc space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(3), and two equivalent P(4) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one P(1), one P(3), one P(4), and two equivalent P(2) atoms. In the third K site, K(3) is bonded in a 4-coordinate geometry to one P(1), one P(2), one P(3), and one P(4) atom. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(3) atoms. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(4) atoms. Ba(1) is bonded in a 5-coordinate geometry to one P(1), one P(3), one P(4), and two equivalent P(2) atoms. Ta(1) is bonded in a tetrahedral geometry to 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), two equivalent K(1), two equivalent K(5), one Ba(1), and one Ta(1) atom. In the second P site, P(1) is bonded in a 1-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), one Ba(1), and one Ta(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one K(3), one K(4), one K(5), two equivalent K(2), two equivalent Ba(1), and one Ta(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one K(2), one K(3), two equivalent K(1), two equivalent K(4), one Ba(1), and one Ta(1) atom.
K5BaTaP4 crystallizes in the monoclinic Cc space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one P(1), two equivalent P(3), and two equivalent P(4) atoms. The K(1)-P(1) bond length is 3.51 Å. There is one shorter (3.41 Å) and one longer (3.49 Å) K(1)-P(3) bond length. There is one shorter (3.36 Å) and one longer (3.59 Å) K(1)-P(4) bond length. In the second K site, K(2) is bonded in a 5-coordinate geometry to one P(1), one P(3), one P(4), and two equivalent P(2) atoms. The K(2)-P(1) bond length is 3.39 Å. The K(2)-P(3) bond length is 3.37 Å. The K(2)-P(4) bond length is 3.53 Å. There is one shorter (3.36 Å) and one longer (3.51 Å) K(2)-P(2) bond length. In the third K site, K(3) is bonded in a 4-coordinate geometry to one P(1), one P(2), one P(3), and one P(4) atom. The K(3)-P(1) bond length is 3.35 Å. The K(3)-P(2) bond length is 3.28 Å. The K(3)-P(3) bond length is 3.28 Å. The K(3)-P(4) bond length is 3.31 Å. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(3) atoms. The K(4)-P(1) bond length is 3.44 Å. The K(4)-P(2) bond length is 3.41 Å. There is one shorter (3.23 Å) and one longer (3.32 Å) K(4)-P(3) bond length. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one P(1), one P(2), and two equivalent P(4) atoms. The K(5)-P(1) bond length is 3.36 Å. The K(5)-P(2) bond length is 3.42 Å. There is one shorter (3.28 Å) and one longer (3.37 Å) K(5)-P(4) bond length. Ba(1) is bonded in a 5-coordinate geometry to one P(1), one P(3), one P(4), and two equivalent P(2) atoms. The Ba(1)-P(1) bond length is 3.33 Å. The Ba(1)-P(3) bond length is 3.37 Å. The Ba(1)-P(4) bond length is 3.25 Å. There is one shorter (3.28 Å) and one longer (3.47 Å) Ba(1)-P(2) bond length. Ta(1) is bonded in a tetrahedral geometry to one P(1), one P(2), one P(3), and one P(4) atom. The Ta(1)-P(1) bond length is 2.41 Å. The Ta(1)-P(2) bond length is 2.42 Å. The Ta(1)-P(3) bond length is 2.43 Å. The Ta(1)-P(4) bond length is 2.42 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), two equivalent K(1), two equivalent K(5), one Ba(1), and one Ta(1) atom. In the second P site, P(1) is bonded in a 1-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), one Ba(1), and one Ta(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one K(3), one K(4), one K(5), two equivalent K(2), two equivalent Ba(1), and one Ta(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one K(2), one K(3), two equivalent K(1), two equivalent K(4), one Ba(1), and one Ta(1) atom.