BaSrMg6 crystallizes in the orthorhombic Amm2 space group. Ba(1) is bonded to two equivalent Sr(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form BaSr2Mg10 cuboctahedra that share corners with six equivalent Ba(1)Sr2Mg10 cuboctahedra, edges with four equivalent Sr(1)Ba2Mg10 cuboctahedra, faces with two equivalent Ba(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Ba2Mg10 cuboctahedra. Sr(1) is bonded to two equivalent Ba(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form SrBa2Mg10 cuboctahedra that share corners with six equivalent Sr(1)Ba2Mg10 cuboctahedra, edges with four equivalent Ba(1)Sr2Mg10 cuboctahedra, faces with two equivalent Ba(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Ba2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Ba(1), two equivalent Sr(1), one Mg(1), one Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Sr(1), two equivalent Mg(1), and two equivalent Mg(2) atoms. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Mg(2), and four equivalent Mg(1) atoms.
BaSrMg6 crystallizes in the orthorhombic Amm2 space group. Ba(1) is bonded to two equivalent Sr(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form BaSr2Mg10 cuboctahedra that share corners with six equivalent Ba(1)Sr2Mg10 cuboctahedra, edges with four equivalent Sr(1)Ba2Mg10 cuboctahedra, faces with two equivalent Ba(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Ba2Mg10 cuboctahedra. Both Ba(1)-Sr(1) bond lengths are 3.63 Å. Both Ba(1)-Mg(4) bond lengths are 3.62 Å. All Ba(1)-Mg(1) bond lengths are 3.48 Å. There are two shorter (3.44 Å) and two longer (3.72 Å) Ba(1)-Mg(3) bond lengths. Sr(1) is bonded to two equivalent Ba(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form SrBa2Mg10 cuboctahedra that share corners with six equivalent Sr(1)Ba2Mg10 cuboctahedra, edges with four equivalent Ba(1)Sr2Mg10 cuboctahedra, faces with two equivalent Ba(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Ba2Mg10 cuboctahedra. Both Sr(1)-Mg(2) bond lengths are 3.62 Å. There are two shorter (3.40 Å) and two longer (3.76 Å) Sr(1)-Mg(1) bond lengths. All Sr(1)-Mg(3) bond lengths are 3.44 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Ba(1), two equivalent Sr(1), one Mg(1), one Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. The Mg(1)-Mg(1) bond length is 3.35 Å. The Mg(1)-Mg(2) bond length is 3.52 Å. Both Mg(1)-Mg(3) bond lengths are 3.47 Å. Both Mg(1)-Mg(4) bond lengths are 3.36 Å. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. Both Mg(2)-Mg(4) bond lengths are 3.50 Å. All Mg(2)-Mg(3) bond lengths are 3.41 Å. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Sr(1), two equivalent Mg(1), and two equivalent Mg(2) atoms. In the fourth Mg site, Mg(4) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Mg(2), and four equivalent Mg(1) atoms.