Ca2YSnO5 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(4), one O(6), and one O(7) atom. In the third Ca site, Ca(3) is bonded to one O(1), one O(10), one O(4), one O(6), and one O(7) atom to form distorted CaO5 square pyramids that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid,  a cornercorner with one Ca(4)O5 square pyramid,  an edgeedge with one Sn(1)O6 pentagonal pyramid, and  a faceface with one Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. In the fourth Ca site, Ca(4) is bonded to one O(1), one O(3), one O(5), one O(8), and one O(9) atom to form distorted CaO5 square pyramids that share corners with two equivalent Y(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid,  a cornercorner with one Ca(3)O5 square pyramid, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 67-75°. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(10), one O(2), one O(4), one O(5), and one O(6) atom to form distorted YO6 octahedra that share  a cornercorner with one Ca(3)O5 square pyramid, corners with two equivalent Ca(4)O5 square pyramids,  an edgeedge with one Sn(1)O6 pentagonal pyramid, and  a faceface with one Ca(3)O5 square pyramid. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(10), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form distorted SnO6 pentagonal pyramids that share  a cornercorner with one Ca(3)O5 square pyramid,  a cornercorner with one Ca(4)O5 square pyramid,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Ca(3)O5 square pyramid, and  an edgeedge with one Ca(4)O5 square pyramid. In the second Sn site, Sn(2) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(7), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(3), one Ca(4), one Y(1), and one Y(2) atom to form distorted OCa2Y2 tetrahedra that share corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), one Y(1), and one Y(2) atom to form OCa2Y2 tetrahedra that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the third O site, O(3) is bonded to one Ca(1), one Ca(4), one Y(2), and one Sn(1) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(4)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  a cornercorner with one O(10)Ca2YSn trigonal pyramid. In the fourth O site, O(4) is bonded to one Ca(2), one Ca(3), one Y(1), and one Sn(1) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(3)Ca2YSn tetrahedra,  a cornercorner with one O(5)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(10)Ca2YSn trigonal pyramids, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(4), one Y(1), and one Sn(2) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(4)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, and  a cornercorner with one O(10)Ca2YSn trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Ca(2), one Ca(3), one Y(1), and one Y(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Sn(1), and one Sn(2) atom. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Ca(1), one Ca(4), one Sn(1), and one Sn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(4), one Y(2), and one Sn(1) atom. In the tenth O site, O(10) is bonded to one Ca(2), one Ca(3), one Y(1), and one Sn(1) atom to form distorted OCa2YSn trigonal pyramids that share  a cornercorner with one O(3)Ca2YSn tetrahedra,  a cornercorner with one O(5)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra,  an edgeedge with one O(1)Ca2Y2 tetrahedra,  an edgeedge with one O(2)Ca2Y2 tetrahedra, and  an edgeedge with one O(4)Ca2YSn tetrahedra.
Ca2YSnO5 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. The Ca(1)-O(2) bond length is 2.31 Å. The Ca(1)-O(3) bond length is 2.41 Å. The Ca(1)-O(5) bond length is 2.36 Å. The Ca(1)-O(7) bond length is 2.94 Å. The Ca(1)-O(8) bond length is 2.39 Å. The Ca(1)-O(9) bond length is 2.35 Å. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(4), one O(6), and one O(7) atom. The Ca(2)-O(10) bond length is 2.28 Å. The Ca(2)-O(2) bond length is 2.26 Å. The Ca(2)-O(4) bond length is 2.29 Å. The Ca(2)-O(6) bond length is 2.30 Å. The Ca(2)-O(7) bond length is 2.99 Å. In the third Ca site, Ca(3) is bonded to one O(1), one O(10), one O(4), one O(6), and one O(7) atom to form distorted CaO5 square pyramids that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid,  a cornercorner with one Ca(4)O5 square pyramid,  an edgeedge with one Sn(1)O6 pentagonal pyramid, and  a faceface with one Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. The Ca(3)-O(1) bond length is 2.38 Å. The Ca(3)-O(10) bond length is 2.30 Å. The Ca(3)-O(4) bond length is 2.32 Å. The Ca(3)-O(6) bond length is 2.35 Å. The Ca(3)-O(7) bond length is 2.33 Å. In the fourth Ca site, Ca(4) is bonded to one O(1), one O(3), one O(5), one O(8), and one O(9) atom to form distorted CaO5 square pyramids that share corners with two equivalent Y(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid,  a cornercorner with one Ca(3)O5 square pyramid, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 67-75°. The Ca(4)-O(1) bond length is 2.27 Å. The Ca(4)-O(3) bond length is 2.29 Å. The Ca(4)-O(5) bond length is 2.45 Å. The Ca(4)-O(8) bond length is 2.40 Å. The Ca(4)-O(9) bond length is 2.33 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(10), one O(2), one O(4), one O(5), and one O(6) atom to form distorted YO6 octahedra that share  a cornercorner with one Ca(3)O5 square pyramid, corners with two equivalent Ca(4)O5 square pyramids,  an edgeedge with one Sn(1)O6 pentagonal pyramid, and  a faceface with one Ca(3)O5 square pyramid. The Y(1)-O(1) bond length is 2.28 Å. The Y(1)-O(10) bond length is 2.50 Å. The Y(1)-O(2) bond length is 2.31 Å. The Y(1)-O(4) bond length is 2.26 Å. The Y(1)-O(5) bond length is 2.30 Å. The Y(1)-O(6) bond length is 2.42 Å. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(9) atom. The Y(2)-O(1) bond length is 2.14 Å. The Y(2)-O(2) bond length is 2.27 Å. The Y(2)-O(3) bond length is 2.21 Å. The Y(2)-O(6) bond length is 2.22 Å. The Y(2)-O(9) bond length is 2.75 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(10), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form distorted SnO6 pentagonal pyramids that share  a cornercorner with one Ca(3)O5 square pyramid,  a cornercorner with one Ca(4)O5 square pyramid,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Ca(3)O5 square pyramid, and  an edgeedge with one Ca(4)O5 square pyramid. The Sn(1)-O(10) bond length is 2.04 Å. The Sn(1)-O(3) bond length is 2.13 Å. The Sn(1)-O(4) bond length is 2.24 Å. The Sn(1)-O(7) bond length is 2.15 Å. The Sn(1)-O(8) bond length is 2.21 Å. The Sn(1)-O(9) bond length is 2.09 Å. In the second Sn site, Sn(2) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(7), and one O(8) atom. The Sn(2)-O(5) bond length is 2.22 Å. The Sn(2)-O(7) bond length is 2.14 Å. The Sn(2)-O(8) bond length is 2.13 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(3), one Ca(4), one Y(1), and one Y(2) atom to form distorted OCa2Y2 tetrahedra that share corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the second O site, O(2) is bonded to one Ca(1), one Ca(2), one Y(1), and one Y(2) atom to form OCa2Y2 tetrahedra that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the third O site, O(3) is bonded to one Ca(1), one Ca(4), one Y(2), and one Sn(1) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(4)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(5)Ca2YSn tetrahedra, and  a cornercorner with one O(10)Ca2YSn trigonal pyramid. In the fourth O site, O(4) is bonded to one Ca(2), one Ca(3), one Y(1), and one Sn(1) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(3)Ca2YSn tetrahedra,  a cornercorner with one O(5)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(10)Ca2YSn trigonal pyramids, and  an edgeedge with one O(10)Ca2YSn trigonal pyramid. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(4), one Y(1), and one Sn(2) atom to form OCa2YSn tetrahedra that share  a cornercorner with one O(4)Ca2YSn tetrahedra, corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YSn tetrahedra, and  a cornercorner with one O(10)Ca2YSn trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Ca(2), one Ca(3), one Y(1), and one Y(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Sn(1), and one Sn(2) atom. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Ca(1), one Ca(4), one Sn(1), and one Sn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(4), one Y(2), and one Sn(1) atom. In the tenth O site, O(10) is bonded to one Ca(2), one Ca(3), one Y(1), and one Sn(1) atom to form distorted OCa2YSn trigonal pyramids that share  a cornercorner with one O(3)Ca2YSn tetrahedra,  a cornercorner with one O(5)Ca2YSn tetrahedra, corners with two equivalent O(4)Ca2YSn tetrahedra,  an edgeedge with one O(1)Ca2Y2 tetrahedra,  an edgeedge with one O(2)Ca2Y2 tetrahedra, and  an edgeedge with one O(4)Ca2YSn tetrahedra.