Ag2FeMn2(PO4)3 crystallizes in the monoclinic C2 space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(8) atom. In the second Mn site, Mn(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(6) atoms. In the third Mn site, Mn(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(10) and two equivalent O(12) atoms. Fe(1) is bonded to one O(10), one O(11), one O(2), one O(3), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one P(4)O4 tetrahedra. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(5) atoms. In the second Ag site, Ag(2) is bonded in a 5-coordinate geometry to one P(3), one O(12), one O(3), one O(6), and one O(8) atom. In the third Ag site, Ag(3) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(8), and two equivalent O(9) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(3), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(5) atoms. In the third P site, P(3) is bonded in a distorted bent 120 degrees geometry to one Ag(2), one O(10), and one O(9) atom. In the fourth P site, P(4) is bonded to two equivalent O(11) and two equivalent O(7) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(1)O5 square pyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mn(1), one Fe(1), and one Ag(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1), one Ag(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Mn(1) and one O(6) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ag(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mn(2), one Ag(2), and one O(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded to one Mn(1), one Fe(1), one Ag(2), and one Ag(3) atom to form distorted corner-sharing OMnFeAg2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Ag(3) and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mn(3), one Fe(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 1-coordinate geometry to one Fe(1), one Ag(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(3), one Ag(2), and one P(1) atom.
Ag2FeMn2(PO4)3 crystallizes in the monoclinic C2 space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(8) atom. The Mn(1)-O(1) bond length is 2.13 Å. The Mn(1)-O(2) bond length is 1.96 Å. The Mn(1)-O(4) bond length is 2.06 Å. The Mn(1)-O(8) bond length is 2.00 Å. In the second Mn site, Mn(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(6) atoms. Both Mn(2)-O(1) bond lengths are 2.06 Å. Both Mn(2)-O(6) bond lengths are 2.07 Å. In the third Mn site, Mn(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(10) and two equivalent O(12) atoms. Both Mn(3)-O(10) bond lengths are 2.44 Å. Both Mn(3)-O(12) bond lengths are 1.97 Å. Fe(1) is bonded to one O(10), one O(11), one O(2), one O(3), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one P(4)O4 tetrahedra. The Fe(1)-O(10) bond length is 2.08 Å. The Fe(1)-O(11) bond length is 2.34 Å. The Fe(1)-O(2) bond length is 1.86 Å. The Fe(1)-O(3) bond length is 1.96 Å. The Fe(1)-O(8) bond length is 1.97 Å. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(5) atoms. Both Ag(1)-O(2) bond lengths are 2.33 Å. Both Ag(1)-O(5) bond lengths are 2.47 Å. In the second Ag site, Ag(2) is bonded in a 5-coordinate geometry to one P(3), one O(12), one O(3), one O(6), and one O(8) atom. The Ag(2)-P(3) bond length is 2.35 Å. The Ag(2)-O(12) bond length is 2.58 Å. The Ag(2)-O(3) bond length is 2.76 Å. The Ag(2)-O(6) bond length is 2.47 Å. The Ag(2)-O(8) bond length is 2.18 Å. In the third Ag site, Ag(3) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(8), and two equivalent O(9) atoms. Both Ag(3)-O(11) bond lengths are 2.83 Å. Both Ag(3)-O(8) bond lengths are 2.64 Å. Both Ag(3)-O(9) bond lengths are 2.61 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(3), and one O(7) atom. The P(1)-O(12) bond length is 1.58 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(7) bond length is 1.73 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(5) atoms. Both P(2)-O(1) bond lengths are 1.62 Å. Both P(2)-O(5) bond lengths are 1.52 Å. In the third P site, P(3) is bonded in a distorted bent 120 degrees geometry to one Ag(2), one O(10), and one O(9) atom. The P(3)-O(10) bond length is 1.55 Å. The P(3)-O(9) bond length is 1.50 Å. In the fourth P site, P(4) is bonded to two equivalent O(11) and two equivalent O(7) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(1)O5 square pyramids. Both P(4)-O(11) bond lengths are 1.52 Å. Both P(4)-O(7) bond lengths are 1.62 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mn(1), one Fe(1), and one Ag(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1), one Ag(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Mn(1) and one O(6) atom. The O(4)-O(6) bond length is 1.36 Å. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ag(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mn(2), one Ag(2), and one O(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. In the eighth O site, O(8) is bonded to one Mn(1), one Fe(1), one Ag(2), and one Ag(3) atom to form distorted corner-sharing OMnFeAg2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Ag(3) and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mn(3), one Fe(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 1-coordinate geometry to one Fe(1), one Ag(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(3), one Ag(2), and one P(1) atom.