Ca2YAgO5 crystallizes in the triclinic P1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-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 5-coordinate geometry to one O(10), one O(2), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the third Ca site, Ca(3) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the fourth Ca site, Ca(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form YO4 tetrahedra that share  a cornercorner with one Ag(1)O6 octahedra,  a cornercorner with one Ag(2)O6 octahedra, and corners with two equivalent Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. In the second Y site, Y(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form YO4 tetrahedra that share  a cornercorner with one Ag(1)O6 octahedra,  a cornercorner with one Ag(2)O6 octahedra, and corners with two equivalent Y(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. There are two inequivalent Ag sites. In the first Ag site, Ag(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 AgO6 octahedra that share corners with four equivalent Ag(2)O6 octahedra,  a cornercorner with one Y(1)O4 tetrahedra, and  a cornercorner with one Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-32°. In the second Ag site, Ag(2) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form AgO6 octahedra that share corners with four equivalent Ag(1)O6 octahedra,  a cornercorner with one Y(1)O4 tetrahedra, and  a cornercorner with one Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-32°. 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 OCa2Y2 tetrahedra that share corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YAg trigonal pyramids, corners with two equivalent O(4)Ca2YAg trigonal pyramids, corners with two equivalent O(5)Ca2YAg trigonal pyramids, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. 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)Ca2YAg trigonal pyramids, corners with two equivalent O(4)Ca2YAg trigonal pyramids, corners with two equivalent O(5)Ca2YAg trigonal pyramids, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. In the third O site, O(3) is bonded to one Ca(1), one Ca(4), one Y(2), and one Ag(1) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(4)Ca2YAg trigonal pyramid,  a cornercorner with one O(6)Ca2YAg trigonal pyramid, and corners with two equivalent O(5)Ca2YAg trigonal pyramids. In the fourth O site, O(4) is bonded to one Ca(2), one Ca(3), one Y(1), and one Ag(1) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(3)Ca2YAg trigonal pyramid,  a cornercorner with one O(5)Ca2YAg trigonal pyramid, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(4), one Y(1), and one Ag(2) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(4)Ca2YAg trigonal pyramid,  a cornercorner with one O(6)Ca2YAg trigonal pyramid, and corners with two equivalent O(3)Ca2YAg trigonal pyramids. In the sixth O site, O(6) is bonded to one Ca(2), one Ca(3), one Y(2), and one Ag(2) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(3)Ca2YAg trigonal pyramid,  a cornercorner with one O(5)Ca2YAg trigonal pyramid, and corners with two equivalent O(4)Ca2YAg trigonal pyramids. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one Ag(1), and one Ag(2) atom.
Ca2YAgO5 crystallizes in the triclinic P1 space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-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 2.43 Å. The Ca(1)-O(3) bond length is 2.36 Å. The Ca(1)-O(5) bond length is 2.28 Å. The Ca(1)-O(7) bond length is 2.95 Å. The Ca(1)-O(8) bond length is 2.40 Å. The Ca(1)-O(9) bond length is 2.54 Å. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. The Ca(2)-O(10) bond length is 2.43 Å. The Ca(2)-O(2) bond length is 2.44 Å. The Ca(2)-O(4) bond length is 2.28 Å. The Ca(2)-O(6) bond length is 2.35 Å. The Ca(2)-O(7) bond length is 2.49 Å. The Ca(2)-O(8) bond length is 3.04 Å. The Ca(2)-O(9) bond length is 2.84 Å. In the third Ca site, Ca(3) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. The Ca(3)-O(1) bond length is 2.45 Å. The Ca(3)-O(10) bond length is 2.49 Å. The Ca(3)-O(4) bond length is 2.34 Å. The Ca(3)-O(6) bond length is 2.28 Å. The Ca(3)-O(7) bond length is 2.43 Å. The Ca(3)-O(8) bond length is 2.82 Å. The Ca(3)-O(9) bond length is 3.05 Å. In the fourth Ca site, Ca(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. The Ca(4)-O(1) bond length is 2.43 Å. The Ca(4)-O(3) bond length is 2.28 Å. The Ca(4)-O(5) bond length is 2.38 Å. The Ca(4)-O(7) bond length is 2.94 Å. The Ca(4)-O(8) bond length is 2.54 Å. The Ca(4)-O(9) bond length is 2.40 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form YO4 tetrahedra that share  a cornercorner with one Ag(1)O6 octahedra,  a cornercorner with one Ag(2)O6 octahedra, and corners with two equivalent Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-58°. The Y(1)-O(1) bond length is 2.23 Å. The Y(1)-O(2) bond length is 2.19 Å. The Y(1)-O(4) bond length is 2.13 Å. The Y(1)-O(5) bond length is 2.13 Å. In the second Y site, Y(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form YO4 tetrahedra that share  a cornercorner with one Ag(1)O6 octahedra,  a cornercorner with one Ag(2)O6 octahedra, and corners with two equivalent Y(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. The Y(2)-O(1) bond length is 2.19 Å. The Y(2)-O(2) bond length is 2.23 Å. The Y(2)-O(3) bond length is 2.13 Å. The Y(2)-O(6) bond length is 2.13 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(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 AgO6 octahedra that share corners with four equivalent Ag(2)O6 octahedra,  a cornercorner with one Y(1)O4 tetrahedra, and  a cornercorner with one Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-32°. The Ag(1)-O(10) bond length is 2.14 Å. The Ag(1)-O(3) bond length is 2.34 Å. The Ag(1)-O(4) bond length is 2.35 Å. The Ag(1)-O(7) bond length is 2.17 Å. The Ag(1)-O(8) bond length is 2.19 Å. The Ag(1)-O(9) bond length is 2.12 Å. In the second Ag site, Ag(2) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form AgO6 octahedra that share corners with four equivalent Ag(1)O6 octahedra,  a cornercorner with one Y(1)O4 tetrahedra, and  a cornercorner with one Y(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-32°. The Ag(2)-O(10) bond length is 2.16 Å. The Ag(2)-O(5) bond length is 2.32 Å. The Ag(2)-O(6) bond length is 2.32 Å. The Ag(2)-O(7) bond length is 2.14 Å. The Ag(2)-O(8) bond length is 2.12 Å. The Ag(2)-O(9) bond length is 2.18 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 OCa2Y2 tetrahedra that share corners with two equivalent O(2)Ca2Y2 tetrahedra, corners with two equivalent O(3)Ca2YAg trigonal pyramids, corners with two equivalent O(4)Ca2YAg trigonal pyramids, corners with two equivalent O(5)Ca2YAg trigonal pyramids, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. 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)Ca2YAg trigonal pyramids, corners with two equivalent O(4)Ca2YAg trigonal pyramids, corners with two equivalent O(5)Ca2YAg trigonal pyramids, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. In the third O site, O(3) is bonded to one Ca(1), one Ca(4), one Y(2), and one Ag(1) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(4)Ca2YAg trigonal pyramid,  a cornercorner with one O(6)Ca2YAg trigonal pyramid, and corners with two equivalent O(5)Ca2YAg trigonal pyramids. In the fourth O site, O(4) is bonded to one Ca(2), one Ca(3), one Y(1), and one Ag(1) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(3)Ca2YAg trigonal pyramid,  a cornercorner with one O(5)Ca2YAg trigonal pyramid, and corners with two equivalent O(6)Ca2YAg trigonal pyramids. In the fifth O site, O(5) is bonded to one Ca(1), one Ca(4), one Y(1), and one Ag(2) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(4)Ca2YAg trigonal pyramid,  a cornercorner with one O(6)Ca2YAg trigonal pyramid, and corners with two equivalent O(3)Ca2YAg trigonal pyramids. In the sixth O site, O(6) is bonded to one Ca(2), one Ca(3), one Y(2), and one Ag(2) atom to form distorted OCa2YAg trigonal pyramids that share corners with two equivalent O(1)Ca2Y2 tetrahedra, corners with two equivalent O(2)Ca2Y2 tetrahedra,  a cornercorner with one O(3)Ca2YAg trigonal pyramid,  a cornercorner with one O(5)Ca2YAg trigonal pyramid, and corners with two equivalent O(4)Ca2YAg trigonal pyramids. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Ca(1), one Ca(2), one Ca(3), one Ca(4), one Ag(1), and one Ag(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ca(2), one Ca(3), one Ag(1), and one Ag(2) atom.