BaSr4Cl10 is Fluorite-derived structured and crystallizes in the trigonal R-3m space group. Ba(1) is bonded in a body-centered cubic geometry to two equivalent Cl(1) and six equivalent Cl(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to one Cl(3), one Cl(4), three equivalent Cl(1), and three equivalent Cl(5) atoms. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to one Cl(5), three equivalent Cl(3), and four equivalent Cl(2) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Ba(1) and three equivalent Sr(1) atoms to form ClBaSr3 tetrahedra that share corners with three equivalent Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(3)Sr4 tetrahedra, corners with three equivalent Cl(5)Sr4 tetrahedra, corners with seven equivalent Cl(1)BaSr3 tetrahedra, edges with three equivalent Cl(4)Ba3Sr tetrahedra, and edges with three equivalent Cl(5)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form a mixture of edge and corner-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with six equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(3)Sr4 tetrahedra, edges with three equivalent Cl(2)Sr4 tetrahedra, and edges with three equivalent Cl(5)Sr4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to three equivalent Ba(1) and one Sr(1) atom to form ClBa3Sr tetrahedra that share  a cornercorner with one Cl(3)Sr4 tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with three equivalent Cl(5)Sr4 tetrahedra, corners with nine equivalent Cl(4)Ba3Sr tetrahedra, edges with three equivalent Cl(4)Ba3Sr tetrahedra, and edges with three equivalent Cl(1)BaSr3 tetrahedra. In the fifth Cl site, Cl(5) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form ClSr4 tetrahedra that share corners with three equivalent Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with four equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(5)Sr4 tetrahedra, edges with three equivalent Cl(1)BaSr3 tetrahedra, and edges with three equivalent Cl(3)Sr4 tetrahedra. In the sixth Cl site, Cl(4) is bonded to three equivalent Ba(1) and one Sr(1) atom to form ClBa3Sr tetrahedra that share  a cornercorner with one Cl(3)Sr4 tetrahedra; corners with three equivalent Cl(1)BaSr3 tetrahedra; corners with three equivalent Cl(5)Sr4 tetrahedra; corners with nine Cl(4,4)Ba3Sr tetrahedra; edges with three equivalent Cl(4)Ba3Sr tetrahedra; and edges with three equivalent Cl(1)BaSr3 tetrahedra.
BaSr4Cl10 is Fluorite-derived structured and crystallizes in the trigonal R-3m space group. Ba(1) is bonded in a body-centered cubic geometry to two equivalent Cl(1) and six equivalent Cl(4) atoms. Both Ba(1)-Cl(1) bond lengths are 3.22 Å. All Ba(1)-Cl(4) bond lengths are 3.14 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to one Cl(3), one Cl(4), three equivalent Cl(1), and three equivalent Cl(5) atoms. The Sr(1)-Cl(3) bond length is 3.02 Å. The Sr(1)-Cl(4) bond length is 3.05 Å. All Sr(1)-Cl(1) bond lengths are 3.08 Å. All Sr(1)-Cl(5) bond lengths are 3.07 Å. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to one Cl(5), three equivalent Cl(3), and four equivalent Cl(2) atoms. The Sr(2)-Cl(5) bond length is 3.05 Å. All Sr(2)-Cl(3) bond lengths are 3.08 Å. There is one shorter (3.08 Å) and three longer (3.09 Å) Sr(2)-Cl(2) bond lengths. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Ba(1) and three equivalent Sr(1) atoms to form ClBaSr3 tetrahedra that share corners with three equivalent Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(3)Sr4 tetrahedra, corners with three equivalent Cl(5)Sr4 tetrahedra, corners with seven equivalent Cl(1)BaSr3 tetrahedra, edges with three equivalent Cl(4)Ba3Sr tetrahedra, and edges with three equivalent Cl(5)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form a mixture of edge and corner-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with six equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(3)Sr4 tetrahedra, edges with three equivalent Cl(2)Sr4 tetrahedra, and edges with three equivalent Cl(5)Sr4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to three equivalent Ba(1) and one Sr(1) atom to form ClBa3Sr tetrahedra that share  a cornercorner with one Cl(3)Sr4 tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with three equivalent Cl(5)Sr4 tetrahedra, corners with nine equivalent Cl(4)Ba3Sr tetrahedra, edges with three equivalent Cl(4)Ba3Sr tetrahedra, and edges with three equivalent Cl(1)BaSr3 tetrahedra. In the fifth Cl site, Cl(5) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form ClSr4 tetrahedra that share corners with three equivalent Cl(4)Ba3Sr tetrahedra, corners with three equivalent Cl(1)BaSr3 tetrahedra, corners with four equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(5)Sr4 tetrahedra, edges with three equivalent Cl(1)BaSr3 tetrahedra, and edges with three equivalent Cl(3)Sr4 tetrahedra. In the sixth Cl site, Cl(4) is bonded to three equivalent Ba(1) and one Sr(1) atom to form ClBa3Sr tetrahedra that share  a cornercorner with one Cl(3)Sr4 tetrahedra; corners with three equivalent Cl(1)BaSr3 tetrahedra; corners with three equivalent Cl(5)Sr4 tetrahedra; corners with nine Cl(4,4)Ba3Sr tetrahedra; edges with three equivalent Cl(4)Ba3Sr tetrahedra; and edges with three equivalent Cl(1)BaSr3 tetrahedra. All Cl(4)-Ba(1) bond lengths are 3.14 Å. The Cl(4)-Sr(1) bond length is 3.05 Å.