Sr15La2Cl36 is alpha bismuth trifluoride-derived structured and crystallizes in the trigonal R3m space group. There are twelve inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Cl(4), three equivalent Cl(1), and three equivalent Cl(36) atoms. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to one Cl(1), one Cl(6), three equivalent Cl(2), and three equivalent Cl(4) atoms. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to one Cl(2), one Cl(7), three equivalent Cl(3), and three equivalent Cl(6) atoms. In the fourth Sr site, Sr(4) is bonded in a body-centered cubic geometry to one Cl(3); one Cl(9); three equivalent Cl(5,15); and three equivalent Cl(7) atoms. In the fifth Sr site, Sr(5,6,7) is bonded in a body-centered cubic geometry to one Cl(11,14,16,18,19); one Cl(5,15); three equivalent Cl(8,10,12,13); and three equivalent Cl(9) atoms. In the sixth Sr site, Sr(8,9) is bonded in a body-centered cubic geometry to four equivalent Cl(11,14,16,18,19) and four equivalent Cl(8,10,12,13) atoms. In the seventh Sr site, Sr(10) is bonded in a body-centered cubic geometry to one Cl(21); one Cl(5,15); three equivalent Cl(11,14,16,18,19); and three equivalent Cl(17) atoms. In the eighth Sr site, Sr(11) is bonded in a body-centered cubic geometry to one Cl(17), one Cl(23), three equivalent Cl(20), and three equivalent Cl(21) atoms. In the ninth Sr site, Sr(12) is bonded in a body-centered cubic geometry to one Cl(22), one Cl(27), three equivalent Cl(24), and three equivalent Cl(26) atoms. In the tenth Sr site, Sr(13) is bonded in a body-centered cubic geometry to one Cl(20), one Cl(26), three equivalent Cl(22), and three equivalent Cl(23) atoms. In the eleventh Sr site, Sr(14) is bonded in a body-centered cubic geometry to one Cl(24), one Cl(30), three equivalent Cl(25), and three equivalent Cl(27) atoms. In the twelfth Sr site, Sr(15) is bonded in a 7-coordinate geometry to one Cl(28), one Cl(35), three equivalent Cl(31), and three equivalent Cl(32) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 11-coordinate geometry to one Cl(25), one Cl(32), three equivalent Cl(28), three equivalent Cl(29), and three equivalent Cl(30) atoms. In the second La site, La(2) is bonded in a 11-coordinate geometry to one Cl(31), one Cl(36), three equivalent Cl(33), three equivalent Cl(34), and three equivalent Cl(35) atoms. There are twenty-eight inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(6)Sr4 tetrahedra, corners with three equivalent Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(1)Sr4 tetrahedra, edges with three equivalent Cl(36)Sr3La tetrahedra, and edges with three equivalent Cl(4)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to one Sr(3) and three equivalent Sr(2) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to one Sr(4) and three equivalent Sr(3) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with three equivalent Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(2)Sr4 tetrahedra, corners with three equivalent Cl(6)Sr4 tetrahedra, corners with six equivalent Cl(4)Sr4 tetrahedra, edges with three equivalent Cl(1)Sr4 tetrahedra, and edges with three equivalent Cl(2)Sr4 tetrahedra. In the fifth Cl site, Cl(5,15) is bonded to one Sr(5,6,7) and three equivalent Sr(4) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the sixth Cl site, Cl(6) is bonded to one Sr(2) and three equivalent Sr(3) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the seventh Cl site, Cl(7) is bonded to one Sr(3) and three equivalent Sr(4) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the eighth Cl site, Cl(8,10,12,13) is bonded to four equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the ninth Cl site, Cl(9) is bonded to one Sr(4) and three equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the tenth Cl site, Cl(11,14,16,18,19) is bonded to four equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the eleventh Cl site, Cl(17) is bonded to one Sr(11) and three equivalent Sr(10) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the twelfth Cl site, Cl(20) is bonded to one Sr(13) and three equivalent Sr(11) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the thirteenth Cl site, Cl(21) is bonded to one Sr(10) and three equivalent Sr(11) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fourteenth Cl site, Cl(22) is bonded to one Sr(12) and three equivalent Sr(13) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fifteenth Cl site, Cl(23) is bonded to one Sr(11) and three equivalent Sr(13) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the sixteenth Cl site, Cl(24) is bonded to one Sr(14) and three equivalent Sr(12) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(22)Sr4 tetrahedra, corners with three equivalent Cl(26)Sr4 tetrahedra, corners with six equivalent Cl(24)Sr4 tetrahedra, edges with three equivalent Cl(26)Sr4 tetrahedra, and edges with three equivalent Cl(27)Sr4 tetrahedra. In the seventeenth Cl site, Cl(25) is bonded to three equivalent Sr(14) and one La(1) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(24)Sr4 tetrahedra, corners with three equivalent Cl(27)Sr4 tetrahedra, corners with six equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(27)Sr4 tetrahedra, and edges with three equivalent Cl(30)SrLa3 tetrahedra. In the eighteenth Cl site, Cl(26) is bonded to one Sr(13) and three equivalent Sr(12) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the nineteenth Cl site, Cl(27) is bonded to one Sr(12) and three equivalent Sr(14) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(22)Sr4 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(26)Sr4 tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with six equivalent Cl(27)Sr4 tetrahedra, edges with three equivalent Cl(25)Sr3La tetrahedra, and edges with three equivalent Cl(24)Sr4 tetrahedra. In the twentieth Cl site, Cl(28) is bonded to one Sr(15) and three equivalent La(1) atoms to form distorted ClSrLa3 trigonal pyramids that share  a cornercorner with one Cl(35)SrLa3 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with six equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(32)Sr3La tetrahedra, and edges with three equivalent Cl(30)SrLa3 tetrahedra. In the twenty-first Cl site, Cl(29) is bonded in a 3-coordinate geometry to three equivalent La(1) atoms. In the twenty-second Cl site, Cl(30) is bonded to one Sr(14) and three equivalent La(1) atoms to form distorted ClSrLa3 tetrahedra that share  a cornercorner with one Cl(24)Sr4 tetrahedra, corners with three equivalent Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(27)Sr4 tetrahedra, corners with six equivalent Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(25)Sr3La tetrahedra, and edges with three equivalent Cl(28)SrLa3 trigonal pyramids. In the twenty-third Cl site, Cl(31) is bonded to three equivalent Sr(15) and one La(2) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(32)Sr3La tetrahedra, corners with six equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(32)Sr3La tetrahedra, and edges with three equivalent Cl(35)SrLa3 tetrahedra. In the twenty-fourth Cl site, Cl(32) is bonded to three equivalent Sr(15) and one La(1) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(35)SrLa3 tetrahedra, corners with six equivalent Cl(32)Sr3La tetrahedra, edges with three equivalent Cl(31)Sr3La tetrahedra, and edges with three equivalent Cl(28)SrLa3 trigonal pyramids. In the twenty-fifth Cl site, Cl(33) is bonded in a distorted trigonal planar geometry to three equivalent La(2) atoms. In the twenty-sixth Cl site, Cl(34) is bonded in a 3-coordinate geometry to three equivalent La(2) atoms. In the twenty-seventh Cl site, Cl(35) is bonded to one Sr(15) and three equivalent La(2) atoms to form distorted ClSrLa3 tetrahedra that share corners with three equivalent Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(36)Sr3La tetrahedra, corners with six equivalent Cl(35)SrLa3 tetrahedra,  a cornercorner with one Cl(28)SrLa3 trigonal pyramid, and edges with three equivalent Cl(31)Sr3La tetrahedra. In the twenty-eighth Cl site, Cl(36) is bonded to three equivalent Sr(1) and one La(2) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(1)Sr4 tetrahedra, corners with three equivalent Cl(4)Sr4 tetrahedra, corners with three equivalent Cl(35)SrLa3 tetrahedra, corners with six equivalent Cl(36)Sr3La tetrahedra, and edges with three equivalent Cl(1)Sr4 tetrahedra.
Sr15La2Cl36 is alpha bismuth trifluoride-derived structured and crystallizes in the trigonal R3m space group. There are twelve inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Cl(4), three equivalent Cl(1), and three equivalent Cl(36) atoms. The Sr(1)-Cl(4) bond length is 3.03 Å. All Sr(1)-Cl(1) bond lengths are 3.08 Å. All Sr(1)-Cl(36) bond lengths are 3.03 Å. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to one Cl(1), one Cl(6), three equivalent Cl(2), and three equivalent Cl(4) atoms. The Sr(2)-Cl(1) bond length is 2.96 Å. The Sr(2)-Cl(6) bond length is 3.07 Å. All Sr(2)-Cl(2) bond lengths are 3.06 Å. All Sr(2)-Cl(4) bond lengths are 3.06 Å. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to one Cl(2), one Cl(7), three equivalent Cl(3), and three equivalent Cl(6) atoms. The Sr(3)-Cl(2) bond length is 3.04 Å. The Sr(3)-Cl(7) bond length is 3.09 Å. All Sr(3)-Cl(3) bond lengths are 3.07 Å. All Sr(3)-Cl(6) bond lengths are 3.05 Å. In the fourth Sr site, Sr(4) is bonded in a body-centered cubic geometry to one Cl(3); one Cl(9); three equivalent Cl(5,15); and three equivalent Cl(7) atoms. The Sr(4)-Cl(3) bond length is 3.06 Å. The Sr(4)-Cl(9) bond length is 3.09 Å. All Sr(4)-Cl(5,15) bond lengths are 3.07 Å. All Sr(4)-Cl(7) bond lengths are 3.06 Å. In the fifth Sr site, Sr(5,6,7) is bonded in a body-centered cubic geometry to one Cl(11,14,16,18,19); one Cl(5,15); three equivalent Cl(8,10,12,13); and three equivalent Cl(9) atoms. The Sr(5,6,7)-Cl(11,14,16,18,19) bond length is 3.09 Å. The Sr(5,6,7)-Cl(5,15) bond length is 3.06 Å. All Sr(5,6,7)-Cl(8,10,12,13) bond lengths are 3.07 Å. All Sr(5,6,7)-Cl(9) bond lengths are 3.06 Å. In the sixth Sr site, Sr(8,9) is bonded in a body-centered cubic geometry to four equivalent Cl(11,14,16,18,19) and four equivalent Cl(8,10,12,13) atoms. There are three shorter (3.06 Å) and one longer (3.09 Å) Sr(8,9)-Cl(11,14,16,18,19) bond length. There is one shorter (3.06 Å) and three longer (3.07 Å) Sr(8,9)-Cl(8,10,12,13) bond lengths. In the seventh Sr site, Sr(10) is bonded in a body-centered cubic geometry to one Cl(21); one Cl(5,15); three equivalent Cl(11,14,16,18,19); and three equivalent Cl(17) atoms. The Sr(10)-Cl(21) bond length is 3.09 Å. The Sr(10)-Cl(5,15) bond length is 3.06 Å. All Sr(10)-Cl(11,14,16,18,19) bond lengths are 3.06 Å. All Sr(10)-Cl(17) bond lengths are 3.07 Å. In the eighth Sr site, Sr(11) is bonded in a body-centered cubic geometry to one Cl(17), one Cl(23), three equivalent Cl(20), and three equivalent Cl(21) atoms. The Sr(11)-Cl(17) bond length is 3.06 Å. The Sr(11)-Cl(23) bond length is 3.10 Å. All Sr(11)-Cl(20) bond lengths are 3.07 Å. All Sr(11)-Cl(21) bond lengths are 3.06 Å. In the ninth Sr site, Sr(12) is bonded in a body-centered cubic geometry to one Cl(22), one Cl(27), three equivalent Cl(24), and three equivalent Cl(26) atoms. The Sr(12)-Cl(22) bond length is 3.06 Å. The Sr(12)-Cl(27) bond length is 3.07 Å. All Sr(12)-Cl(24) bond lengths are 3.06 Å. All Sr(12)-Cl(26) bond lengths are 3.06 Å. In the tenth Sr site, Sr(13) is bonded in a body-centered cubic geometry to one Cl(20), one Cl(26), three equivalent Cl(22), and three equivalent Cl(23) atoms. The Sr(13)-Cl(20) bond length is 3.06 Å. The Sr(13)-Cl(26) bond length is 3.09 Å. All Sr(13)-Cl(22) bond lengths are 3.07 Å. All Sr(13)-Cl(23) bond lengths are 3.06 Å. In the eleventh Sr site, Sr(14) is bonded in a body-centered cubic geometry to one Cl(24), one Cl(30), three equivalent Cl(25), and three equivalent Cl(27) atoms. The Sr(14)-Cl(24) bond length is 3.05 Å. The Sr(14)-Cl(30) bond length is 2.92 Å. All Sr(14)-Cl(25) bond lengths are 3.11 Å. All Sr(14)-Cl(27) bond lengths are 3.05 Å. In the twelfth Sr site, Sr(15) is bonded in a 7-coordinate geometry to one Cl(28), one Cl(35), three equivalent Cl(31), and three equivalent Cl(32) atoms. The Sr(15)-Cl(28) bond length is 3.56 Å. The Sr(15)-Cl(35) bond length is 2.85 Å. All Sr(15)-Cl(31) bond lengths are 3.13 Å. All Sr(15)-Cl(32) bond lengths are 3.02 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 11-coordinate geometry to one Cl(25), one Cl(32), three equivalent Cl(28), three equivalent Cl(29), and three equivalent Cl(30) atoms. The La(1)-Cl(25) bond length is 3.27 Å. The La(1)-Cl(32) bond length is 2.94 Å. All La(1)-Cl(28) bond lengths are 2.90 Å. All La(1)-Cl(29) bond lengths are 3.27 Å. All La(1)-Cl(30) bond lengths are 3.26 Å. In the second La site, La(2) is bonded in a 11-coordinate geometry to one Cl(31), one Cl(36), three equivalent Cl(33), three equivalent Cl(34), and three equivalent Cl(35) atoms. The La(2)-Cl(31) bond length is 3.12 Å. The La(2)-Cl(36) bond length is 2.98 Å. All La(2)-Cl(33) bond lengths are 2.90 Å. All La(2)-Cl(34) bond lengths are 3.27 Å. All La(2)-Cl(35) bond lengths are 3.25 Å. There are twenty-eight inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(6)Sr4 tetrahedra, corners with three equivalent Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(2)Sr4 tetrahedra, corners with six equivalent Cl(1)Sr4 tetrahedra, edges with three equivalent Cl(36)Sr3La tetrahedra, and edges with three equivalent Cl(4)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to one Sr(3) and three equivalent Sr(2) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to one Sr(4) and three equivalent Sr(3) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fourth Cl site, Cl(4) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with three equivalent Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(2)Sr4 tetrahedra, corners with three equivalent Cl(6)Sr4 tetrahedra, corners with six equivalent Cl(4)Sr4 tetrahedra, edges with three equivalent Cl(1)Sr4 tetrahedra, and edges with three equivalent Cl(2)Sr4 tetrahedra. In the fifth Cl site, Cl(5,15) is bonded to one Sr(5,6,7) and three equivalent Sr(4) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the sixth Cl site, Cl(6) is bonded to one Sr(2) and three equivalent Sr(3) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the seventh Cl site, Cl(7) is bonded to one Sr(3) and three equivalent Sr(4) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the eighth Cl site, Cl(8,10,12,13) is bonded to four equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the ninth Cl site, Cl(9) is bonded to one Sr(4) and three equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the tenth Cl site, Cl(11,14,16,18,19) is bonded to four equivalent Sr(5,6,7) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the eleventh Cl site, Cl(17) is bonded to one Sr(11) and three equivalent Sr(10) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the twelfth Cl site, Cl(20) is bonded to one Sr(13) and three equivalent Sr(11) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the thirteenth Cl site, Cl(21) is bonded to one Sr(10) and three equivalent Sr(11) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fourteenth Cl site, Cl(22) is bonded to one Sr(12) and three equivalent Sr(13) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the fifteenth Cl site, Cl(23) is bonded to one Sr(11) and three equivalent Sr(13) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the sixteenth Cl site, Cl(24) is bonded to one Sr(14) and three equivalent Sr(12) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(22)Sr4 tetrahedra, corners with three equivalent Cl(26)Sr4 tetrahedra, corners with six equivalent Cl(24)Sr4 tetrahedra, edges with three equivalent Cl(26)Sr4 tetrahedra, and edges with three equivalent Cl(27)Sr4 tetrahedra. In the seventeenth Cl site, Cl(25) is bonded to three equivalent Sr(14) and one La(1) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(24)Sr4 tetrahedra, corners with three equivalent Cl(27)Sr4 tetrahedra, corners with six equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(27)Sr4 tetrahedra, and edges with three equivalent Cl(30)SrLa3 tetrahedra. In the eighteenth Cl site, Cl(26) is bonded to one Sr(13) and three equivalent Sr(12) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the nineteenth Cl site, Cl(27) is bonded to one Sr(12) and three equivalent Sr(14) atoms to form ClSr4 tetrahedra that share  a cornercorner with one Cl(22)Sr4 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(26)Sr4 tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with six equivalent Cl(27)Sr4 tetrahedra, edges with three equivalent Cl(25)Sr3La tetrahedra, and edges with three equivalent Cl(24)Sr4 tetrahedra. In the twentieth Cl site, Cl(28) is bonded to one Sr(15) and three equivalent La(1) atoms to form distorted ClSrLa3 trigonal pyramids that share  a cornercorner with one Cl(35)SrLa3 tetrahedra, corners with three equivalent Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with six equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(32)Sr3La tetrahedra, and edges with three equivalent Cl(30)SrLa3 tetrahedra. In the twenty-first Cl site, Cl(29) is bonded in a 3-coordinate geometry to three equivalent La(1) atoms. In the twenty-second Cl site, Cl(30) is bonded to one Sr(14) and three equivalent La(1) atoms to form distorted ClSrLa3 tetrahedra that share  a cornercorner with one Cl(24)Sr4 tetrahedra, corners with three equivalent Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(27)Sr4 tetrahedra, corners with six equivalent Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(25)Sr3La tetrahedra, and edges with three equivalent Cl(28)SrLa3 trigonal pyramids. In the twenty-third Cl site, Cl(31) is bonded to three equivalent Sr(15) and one La(2) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(36)Sr3La tetrahedra, corners with three equivalent Cl(32)Sr3La tetrahedra, corners with six equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(28)SrLa3 trigonal pyramids, edges with three equivalent Cl(32)Sr3La tetrahedra, and edges with three equivalent Cl(35)SrLa3 tetrahedra. In the twenty-fourth Cl site, Cl(32) is bonded to three equivalent Sr(15) and one La(1) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(25)Sr3La tetrahedra, corners with three equivalent Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(30)SrLa3 tetrahedra, corners with three equivalent Cl(35)SrLa3 tetrahedra, corners with six equivalent Cl(32)Sr3La tetrahedra, edges with three equivalent Cl(31)Sr3La tetrahedra, and edges with three equivalent Cl(28)SrLa3 trigonal pyramids. In the twenty-fifth Cl site, Cl(33) is bonded in a distorted trigonal planar geometry to three equivalent La(2) atoms. In the twenty-sixth Cl site, Cl(34) is bonded in a 3-coordinate geometry to three equivalent La(2) atoms. In the twenty-seventh Cl site, Cl(35) is bonded to one Sr(15) and three equivalent La(2) atoms to form distorted ClSrLa3 tetrahedra that share corners with three equivalent Cl(32)Sr3La tetrahedra, corners with three equivalent Cl(36)Sr3La tetrahedra, corners with six equivalent Cl(35)SrLa3 tetrahedra,  a cornercorner with one Cl(28)SrLa3 trigonal pyramid, and edges with three equivalent Cl(31)Sr3La tetrahedra. In the twenty-eighth Cl site, Cl(36) is bonded to three equivalent Sr(1) and one La(2) atom to form ClSr3La tetrahedra that share  a cornercorner with one Cl(31)Sr3La tetrahedra, corners with three equivalent Cl(1)Sr4 tetrahedra, corners with three equivalent Cl(4)Sr4 tetrahedra, corners with three equivalent Cl(35)SrLa3 tetrahedra, corners with six equivalent Cl(36)Sr3La tetrahedra, and edges with three equivalent Cl(1)Sr4 tetrahedra.