NaSrMg6 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Sr(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3) atoms to form NaSr2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Sr2Mg10 cuboctahedra, edges with two equivalent Mg(2)Na2Mg10 cuboctahedra, edges with four equivalent Sr(1)Na2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Na2Mg10 cuboctahedra, and faces with two equivalent Mg(2)Na2Mg10 cuboctahedra. Sr(1) is bonded to two equivalent Na(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3,3) atoms to form SrNa2Mg10 cuboctahedra that share corners with six equivalent Sr(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Na2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Na2Mg10 cuboctahedra. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the second Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the third Mg site, Mg(2) is bonded to two equivalent Na(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(2)Na2Mg10 cuboctahedra, edges with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(2)Na2Mg10 cuboctahedra, and faces with six equivalent Sr(1)Na2Mg10 cuboctahedra. In the fourth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the fifth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the sixth Mg site, Mg(4) is bonded in a 12-coordinate geometry to two equivalent Sr(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3,3) atoms. In the seventh Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms.
NaSrMg6 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Sr(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3) atoms to form NaSr2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Sr2Mg10 cuboctahedra, edges with two equivalent Mg(2)Na2Mg10 cuboctahedra, edges with four equivalent Sr(1)Na2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Na2Mg10 cuboctahedra, and faces with two equivalent Mg(2)Na2Mg10 cuboctahedra. Both Na(1)-Sr(1) bond lengths are 3.41 Å. Both Na(1)-Mg(2) bond lengths are 3.43 Å. There are two shorter (3.31 Å) and two longer (3.59 Å) Na(1)-Mg(1,1) bond lengths. All Na(1)-Mg(3,3) bond lengths are 3.34 Å. Sr(1) is bonded to two equivalent Na(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3,3) atoms to form SrNa2Mg10 cuboctahedra that share corners with six equivalent Sr(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Sr(1)Na2Mg10 cuboctahedra, and faces with six equivalent Mg(2)Na2Mg10 cuboctahedra. Both Sr(1)-Mg(4) bond lengths are 3.42 Å. All Sr(1)-Mg(1,1) bond lengths are 3.40 Å. There are two shorter (3.41 Å) and two longer (3.48 Å) Sr(1)-Mg(3,3,3) bond lengths. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. There is one shorter (3.28 Å) and one longer (3.57 Å) Mg(1)-Mg(1) bond length. There is one shorter (3.44 Å) and one longer (3.45 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.31 Å. Both Mg(1)-Mg(4) bond lengths are 3.32 Å. In the second Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. There is one shorter (3.44 Å) and one longer (3.45 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.31 Å. Both Mg(1)-Mg(4) bond lengths are 3.32 Å. In the third Mg site, Mg(2) is bonded to two equivalent Na(1); two equivalent Mg(4); four Mg(1,1); and four Mg(3,3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Sr2Mg10 cuboctahedra, corners with six equivalent Mg(2)Na2Mg10 cuboctahedra, edges with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Na(1)Sr2Mg10 cuboctahedra, faces with two equivalent Mg(2)Na2Mg10 cuboctahedra, and faces with six equivalent Sr(1)Na2Mg10 cuboctahedra. Both Mg(2)-Mg(4) bond lengths are 3.38 Å. All Mg(2)-Mg(3,3) bond lengths are 3.37 Å. In the fourth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. Both Mg(3)-Mg(1) bond lengths are 3.31 Å. There is one shorter (3.42 Å) and one longer (3.43 Å) Mg(3)-Mg(3) bond length. There is one shorter (3.38 Å) and one longer (3.51 Å) Mg(3)-Mg(4) bond length. In the fifth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. Both Mg(3)-Mg(1) bond lengths are 3.31 Å. There is one shorter (3.38 Å) and one longer (3.51 Å) Mg(3)-Mg(4) bond length. In the sixth Mg site, Mg(4) is bonded in a 12-coordinate geometry to two equivalent Sr(1); two equivalent Mg(2); four Mg(1,1); and four Mg(3,3,3) atoms. Both Mg(4)-Mg(3) bond lengths are 3.38 Å. In the seventh Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. Both Mg(3)-Na(1) bond lengths are 3.34 Å. Both Mg(3)-Mg(2) bond lengths are 3.37 Å. There is one shorter (3.42 Å) and one longer (3.43 Å) Mg(3)-Mg(3) bond length.