Na5SrNbP4 is alpha Pu-derived structured and crystallizes in the monoclinic Cc space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one Nb(1), one P(4), two equivalent P(2), and two equivalent P(3) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. In the third Na site, Na(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 Na site, Na(4) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(3) atoms. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(2) atoms. Sr(1) is bonded in a 5-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. Nb(1) is bonded in a tetrahedral geometry to one Na(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 7-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Na(5), one Sr(1), and one Nb(1) atom. In the second P site, P(1) is bonded in a 8-coordinate geometry to one Na(3), one Na(4), one Na(5), two equivalent Na(2), two equivalent Sr(1), and one Nb(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(5), one Sr(1), and one Nb(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(4), one Sr(1), and one Nb(1) atom.
Na5SrNbP4 is alpha Pu-derived structured and crystallizes in the monoclinic Cc space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one Nb(1), one P(4), two equivalent P(2), and two equivalent P(3) atoms. The Na(1)-Nb(1) bond length is 3.28 Å. The Na(1)-P(4) bond length is 3.03 Å. There is one shorter (3.06 Å) and one longer (3.33 Å) Na(1)-P(2) bond length. There is one shorter (3.04 Å) and one longer (3.23 Å) Na(1)-P(3) bond length. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. The Na(2)-P(2) bond length is 3.30 Å. The Na(2)-P(3) bond length is 3.05 Å. The Na(2)-P(4) bond length is 2.98 Å. There is one shorter (3.06 Å) and one longer (3.26 Å) Na(2)-P(1) bond length. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one P(1), one P(2), one P(3), and one P(4) atom. The Na(3)-P(1) bond length is 2.94 Å. The Na(3)-P(2) bond length is 2.92 Å. The Na(3)-P(3) bond length is 2.87 Å. The Na(3)-P(4) bond length is 3.11 Å. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(3) atoms. The Na(4)-P(1) bond length is 2.96 Å. The Na(4)-P(4) bond length is 3.04 Å. There is one shorter (2.85 Å) and one longer (2.98 Å) Na(4)-P(3) bond length. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one P(1), one P(4), and two equivalent P(2) atoms. The Na(5)-P(1) bond length is 2.96 Å. The Na(5)-P(4) bond length is 3.10 Å. There is one shorter (2.89 Å) and one longer (2.90 Å) Na(5)-P(2) bond length. Sr(1) is bonded in a 5-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. The Sr(1)-P(2) bond length is 3.07 Å. The Sr(1)-P(3) bond length is 3.18 Å. The Sr(1)-P(4) bond length is 3.01 Å. There is one shorter (3.07 Å) and one longer (3.23 Å) Sr(1)-P(1) bond length. Nb(1) is bonded in a tetrahedral geometry to one Na(1), one P(1), one P(2), one P(3), and one P(4) atom. The Nb(1)-P(1) bond length is 2.42 Å. The Nb(1)-P(2) bond length is 2.38 Å. The Nb(1)-P(3) bond length is 2.40 Å. The Nb(1)-P(4) bond length is 2.40 Å. There are four inequivalent P sites. In the first P site, P(4) is bonded in a 7-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Na(5), one Sr(1), and one Nb(1) atom. In the second P site, P(1) is bonded in a 8-coordinate geometry to one Na(3), one Na(4), one Na(5), two equivalent Na(2), two equivalent Sr(1), and one Nb(1) atom. In the third P site, P(2) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(5), one Sr(1), and one Nb(1) atom. In the fourth P site, P(3) is bonded in a 8-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(4), one Sr(1), and one Nb(1) atom.