SrCoGe2O6 is Esseneite structured and crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(13), one O(19), one O(2), one O(24), one O(3), one O(6), one O(8), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(14), one O(20), one O(23), one O(4), one O(5), and one O(7) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(15), one O(17), one O(22), one O(4), one O(6), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(12), one O(16), one O(18), one O(2), one O(21), one O(3), one O(5), and one O(7) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(14), one O(16), one O(18), and one O(22) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. In the second Co site, Co(2) is bonded to one O(12), one O(14), one O(16), one O(20), one O(24), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. In the third Co site, Co(3) is bonded to one O(12), one O(13), one O(15), one O(17), one O(21), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(10), one O(11), one O(13), one O(15), one O(19), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(18), one O(4), one O(5), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Ge(7)O4 tetrahedra, and  a cornercorner with one Ge(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-64°. In the second Ge site, Ge(2) is bonded to one O(10), one O(17), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(7)O4 tetrahedra, and  a cornercorner with one Ge(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-61°. In the third Ge site, Ge(3) is bonded to one O(11), one O(2), one O(20), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(19), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-62°. In the fifth Ge site, Ge(5) is bonded to one O(1), one O(13), one O(22), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-60°. In the sixth Ge site, Ge(6) is bonded to one O(14), one O(2), one O(21), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. In the seventh Ge site, Ge(7) is bonded to one O(15), one O(24), one O(3), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-61°. In the eighth Ge site, Ge(8) is bonded to one O(16), one O(23), one O(4), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-62°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Ge(4), and one Ge(5) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Ge(3), and one Ge(6) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Ge(2), and one Ge(7) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Ge(1), and one Ge(8) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Ge(1), and one Ge(7) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Ge(2), and one Ge(8) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Ge(3), and one Ge(5) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Ge(4), and one Ge(6) atom. In the ninth O site, O(9) is bonded to one Sr(1), one Co(2), one Co(3), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the tenth O site, O(10) is bonded to one Sr(2), one Co(1), one Co(4), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the eleventh O site, O(11) is bonded to one Sr(3), one Co(1), one Co(4), and one Ge(3) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the twelfth O site, O(12) is bonded to one Sr(4), one Co(2), one Co(3), and one Ge(4) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the thirteenth O site, O(13) is bonded to one Sr(1), one Co(3), one Co(4), and one Ge(5) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the fourteenth O site, O(14) is bonded to one Sr(2), one Co(1), one Co(2), and one Ge(6) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the fifteenth O site, O(15) is bonded to one Sr(3), one Co(3), one Co(4), and one Ge(7) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the sixteenth O site, O(16) is bonded to one Sr(4), one Co(1), one Co(2), and one Ge(8) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted T-shaped geometry to one Sr(3), one Co(3), and one Ge(2) atom. In the eighteenth O site, O(18) is bonded in a distorted T-shaped geometry to one Sr(4), one Co(1), and one Ge(1) atom. In the nineteenth O site, O(19) is bonded in a distorted T-shaped geometry to one Sr(1), one Co(4), and one Ge(4) atom. In the twentieth O site, O(20) is bonded in a distorted T-shaped geometry to one Sr(2), one Co(2), and one Ge(3) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Sr(4), one Co(3), and one Ge(6) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Sr(3), one Co(1), and one Ge(5) atom. In the twenty-third O site, O(23) is bonded in a distorted T-shaped geometry to one Sr(2), one Co(4), and one Ge(8) atom. In the twenty-fourth O site, O(24) is bonded in a distorted T-shaped geometry to one Sr(1), one Co(2), and one Ge(7) atom.
SrCoGe2O6 is Esseneite structured and crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(13), one O(19), one O(2), one O(24), one O(3), one O(6), one O(8), and one O(9) atom. The Sr(1)-O(13) bond length is 2.53 Å. The Sr(1)-O(19) bond length is 2.57 Å. The Sr(1)-O(2) bond length is 2.72 Å. The Sr(1)-O(24) bond length is 2.55 Å. The Sr(1)-O(3) bond length is 2.73 Å. The Sr(1)-O(6) bond length is 2.80 Å. The Sr(1)-O(8) bond length is 2.70 Å. The Sr(1)-O(9) bond length is 2.53 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(14), one O(20), one O(23), one O(4), one O(5), and one O(7) atom. The Sr(2)-O(1) bond length is 2.78 Å. The Sr(2)-O(10) bond length is 2.52 Å. The Sr(2)-O(14) bond length is 2.52 Å. The Sr(2)-O(20) bond length is 2.58 Å. The Sr(2)-O(23) bond length is 2.56 Å. The Sr(2)-O(4) bond length is 2.73 Å. The Sr(2)-O(5) bond length is 2.74 Å. The Sr(2)-O(7) bond length is 2.72 Å. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(15), one O(17), one O(22), one O(4), one O(6), and one O(8) atom. The Sr(3)-O(1) bond length is 2.70 Å. The Sr(3)-O(11) bond length is 2.55 Å. The Sr(3)-O(15) bond length is 2.53 Å. The Sr(3)-O(17) bond length is 2.58 Å. The Sr(3)-O(22) bond length is 2.58 Å. The Sr(3)-O(4) bond length is 2.74 Å. The Sr(3)-O(6) bond length is 2.69 Å. The Sr(3)-O(8) bond length is 2.77 Å. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(12), one O(16), one O(18), one O(2), one O(21), one O(3), one O(5), and one O(7) atom. The Sr(4)-O(12) bond length is 2.55 Å. The Sr(4)-O(16) bond length is 2.54 Å. The Sr(4)-O(18) bond length is 2.56 Å. The Sr(4)-O(2) bond length is 2.74 Å. The Sr(4)-O(21) bond length is 2.55 Å. The Sr(4)-O(3) bond length is 2.76 Å. The Sr(4)-O(5) bond length is 2.73 Å. The Sr(4)-O(7) bond length is 2.77 Å. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(14), one O(16), one O(18), and one O(22) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. The Co(1)-O(10) bond length is 2.22 Å. The Co(1)-O(11) bond length is 2.08 Å. The Co(1)-O(14) bond length is 2.14 Å. The Co(1)-O(16) bond length is 2.09 Å. The Co(1)-O(18) bond length is 2.18 Å. The Co(1)-O(22) bond length is 2.12 Å. In the second Co site, Co(2) is bonded to one O(12), one O(14), one O(16), one O(20), one O(24), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The Co(2)-O(12) bond length is 2.17 Å. The Co(2)-O(14) bond length is 2.14 Å. The Co(2)-O(16) bond length is 2.15 Å. The Co(2)-O(20) bond length is 2.11 Å. The Co(2)-O(24) bond length is 2.11 Å. The Co(2)-O(9) bond length is 2.14 Å. In the third Co site, Co(3) is bonded to one O(12), one O(13), one O(15), one O(17), one O(21), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(6)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(4)O6 octahedra. The Co(3)-O(12) bond length is 2.10 Å. The Co(3)-O(13) bond length is 2.24 Å. The Co(3)-O(15) bond length is 2.07 Å. The Co(3)-O(17) bond length is 2.10 Å. The Co(3)-O(21) bond length is 2.19 Å. The Co(3)-O(9) bond length is 2.13 Å. In the fourth Co site, Co(4) is bonded to one O(10), one O(11), one O(13), one O(15), one O(19), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra,  a cornercorner with one Ge(5)O4 tetrahedra,  a cornercorner with one Ge(7)O4 tetrahedra,  a cornercorner with one Ge(8)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The Co(4)-O(10) bond length is 2.08 Å. The Co(4)-O(11) bond length is 2.19 Å. The Co(4)-O(13) bond length is 2.06 Å. The Co(4)-O(15) bond length is 2.24 Å. The Co(4)-O(19) bond length is 2.12 Å. The Co(4)-O(23) bond length is 2.20 Å. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(18), one O(4), one O(5), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Ge(7)O4 tetrahedra, and  a cornercorner with one Ge(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-64°. The Ge(1)-O(18) bond length is 1.73 Å. The Ge(1)-O(4) bond length is 1.82 Å. The Ge(1)-O(5) bond length is 1.85 Å. The Ge(1)-O(9) bond length is 1.75 Å. In the second Ge site, Ge(2) is bonded to one O(10), one O(17), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(7)O4 tetrahedra, and  a cornercorner with one Ge(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-61°. The Ge(2)-O(10) bond length is 1.75 Å. The Ge(2)-O(17) bond length is 1.74 Å. The Ge(2)-O(3) bond length is 1.81 Å. The Ge(2)-O(6) bond length is 1.85 Å. In the third Ge site, Ge(3) is bonded to one O(11), one O(2), one O(20), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. The Ge(3)-O(11) bond length is 1.76 Å. The Ge(3)-O(2) bond length is 1.81 Å. The Ge(3)-O(20) bond length is 1.74 Å. The Ge(3)-O(7) bond length is 1.85 Å. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(19), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(5)O4 tetrahedra, and  a cornercorner with one Ge(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-62°. The Ge(4)-O(1) bond length is 1.81 Å. The Ge(4)-O(12) bond length is 1.75 Å. The Ge(4)-O(19) bond length is 1.74 Å. The Ge(4)-O(8) bond length is 1.84 Å. In the fifth Ge site, Ge(5) is bonded to one O(1), one O(13), one O(22), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-60°. The Ge(5)-O(1) bond length is 1.85 Å. The Ge(5)-O(13) bond length is 1.75 Å. The Ge(5)-O(22) bond length is 1.74 Å. The Ge(5)-O(7) bond length is 1.81 Å. In the sixth Ge site, Ge(6) is bonded to one O(14), one O(2), one O(21), and one O(8) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and  a cornercorner with one Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. The Ge(6)-O(14) bond length is 1.75 Å. The Ge(6)-O(2) bond length is 1.85 Å. The Ge(6)-O(21) bond length is 1.73 Å. The Ge(6)-O(8) bond length is 1.82 Å. In the seventh Ge site, Ge(7) is bonded to one O(15), one O(24), one O(3), and one O(5) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-61°. The Ge(7)-O(15) bond length is 1.75 Å. The Ge(7)-O(24) bond length is 1.74 Å. The Ge(7)-O(3) bond length is 1.85 Å. The Ge(7)-O(5) bond length is 1.81 Å. In the eighth Ge site, Ge(8) is bonded to one O(16), one O(23), one O(4), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-62°. The Ge(8)-O(16) bond length is 1.76 Å. The Ge(8)-O(23) bond length is 1.73 Å. The Ge(8)-O(4) bond length is 1.85 Å. The Ge(8)-O(6) bond length is 1.82 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Ge(4), and one Ge(5) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Ge(3), and one Ge(6) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Ge(2), and one Ge(7) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(3), one Ge(1), and one Ge(8) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Ge(1), and one Ge(7) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Ge(2), and one Ge(8) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Ge(3), and one Ge(5) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Ge(4), and one Ge(6) atom. In the ninth O site, O(9) is bonded to one Sr(1), one Co(2), one Co(3), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the tenth O site, O(10) is bonded to one Sr(2), one Co(1), one Co(4), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the eleventh O site, O(11) is bonded to one Sr(3), one Co(1), one Co(4), and one Ge(3) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the twelfth O site, O(12) is bonded to one Sr(4), one Co(2), one Co(3), and one Ge(4) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the thirteenth O site, O(13) is bonded to one Sr(1), one Co(3), one Co(4), and one Ge(5) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the fourteenth O site, O(14) is bonded to one Sr(2), one Co(1), one Co(2), and one Ge(6) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the fifteenth O site, O(15) is bonded to one Sr(3), one Co(3), one Co(4), and one Ge(7) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the sixteenth O site, O(16) is bonded to one Sr(4), one Co(1), one Co(2), and one Ge(8) atom to form a mixture of distorted corner and edge-sharing OSrCo2Ge tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted T-shaped geometry to one Sr(3), one Co(3), and one Ge(2) atom. In the eighteenth O site, O(18) is bonded in a distorted T-shaped geometry to one Sr(4), one Co(1), and one Ge(1) atom. In the nineteenth O site, O(19) is bonded in a distorted T-shaped geometry to one Sr(1), one Co(4), and one Ge(4) atom. In the twentieth O site, O(20) is bonded in a distorted T-shaped geometry to one Sr(2), one Co(2), and one Ge(3) atom. In the twenty-first O site, O(21) is bonded in a distorted T-shaped geometry to one Sr(4), one Co(3), and one Ge(6) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Sr(3), one Co(1), and one Ge(5) atom. In the twenty-third O site, O(23) is bonded in a distorted T-shaped geometry to one Sr(2), one Co(4), and one Ge(8) atom. In the twenty-fourth O site, O(24) is bonded in a distorted T-shaped geometry to one Sr(1), one Co(2), and one Ge(7) atom.