Mn3Ga3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted MnN4 trigonal pyramids that share  a cornercorner with one Ga(3)N4 tetrahedra, corners with three equivalent Mn(3)N4 tetrahedra, and  an edgeedge with one Ga(3)N4 tetrahedra. In the second Mn site, Mn(2) is bonded in a 3-coordinate geometry to one Ga(2), one N(1), one N(3), and one N(5) atom. In the third Mn site, Mn(3) is bonded to one N(1), one N(2), one N(3), and one N(5) atom to form MnN4 tetrahedra that share corners with two equivalent Ga(3)N4 tetrahedra and corners with three equivalent Mn(1)N4 trigonal pyramids. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted water-like geometry to one N(3) and one N(5) atom. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to one Mn(2), one N(2), and two equivalent N(4) atoms. In the third Ga site, Ga(3) is bonded to one N(1), one N(5), and two equivalent N(4) atoms to form distorted GaN4 tetrahedra that share corners with two equivalent Mn(3)N4 tetrahedra,  a cornercorner with one Mn(1)N4 trigonal pyramid,  an edgeedge with one Ga(3)N4 tetrahedra, and  an edgeedge with one Mn(1)N4 trigonal pyramid. There are five inequivalent N sites. In the first N site, N(1) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Ga(3) atom to form NMn3Ga tetrahedra that share corners with three equivalent N(5)Mn2Ga2 tetrahedra,  a cornercorner with one N(4)MnGa4 trigonal bipyramid, corners with three equivalent N(3)Mn3Ga trigonal pyramids, and  an edgeedge with one N(4)MnGa4 trigonal bipyramid. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Ga(2) atom. In the third N site, N(3) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Ga(1) atom to form distorted NMn3Ga trigonal pyramids that share  a cornercorner with one N(5)Mn2Ga2 tetrahedra, corners with three equivalent N(1)Mn3Ga tetrahedra,  a cornercorner with one N(4)MnGa4 trigonal bipyramid, and  an edgeedge with one N(5)Mn2Ga2 tetrahedra. In the fourth N site, N(4) is bonded to one Mn(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form NMnGa4 trigonal bipyramids that share  a cornercorner with one N(1)Mn3Ga tetrahedra, corners with two equivalent N(5)Mn2Ga2 tetrahedra,  a cornercorner with one N(3)Mn3Ga trigonal pyramid,  an edgeedge with one N(1)Mn3Ga tetrahedra, and edges with two equivalent N(4)MnGa4 trigonal bipyramids. In the fifth N site, N(5) is bonded to one Mn(2), one Mn(3), one Ga(1), and one Ga(3) atom to form NMn2Ga2 tetrahedra that share corners with three equivalent N(1)Mn3Ga tetrahedra, corners with two equivalent N(4)MnGa4 trigonal bipyramids,  a cornercorner with one N(3)Mn3Ga trigonal pyramid, and  an edgeedge with one N(3)Mn3Ga trigonal pyramid.
Mn3Ga3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted MnN4 trigonal pyramids that share  a cornercorner with one Ga(3)N4 tetrahedra, corners with three equivalent Mn(3)N4 tetrahedra, and  an edgeedge with one Ga(3)N4 tetrahedra. The Mn(1)-N(1) bond length is 1.90 Å. The Mn(1)-N(2) bond length is 1.81 Å. The Mn(1)-N(3) bond length is 1.85 Å. The Mn(1)-N(4) bond length is 2.04 Å. In the second Mn site, Mn(2) is bonded in a 3-coordinate geometry to one Ga(2), one N(1), one N(3), and one N(5) atom. The Mn(2)-Ga(2) bond length is 2.53 Å. The Mn(2)-N(1) bond length is 1.98 Å. The Mn(2)-N(3) bond length is 1.92 Å. The Mn(2)-N(5) bond length is 1.99 Å. In the third Mn site, Mn(3) is bonded to one N(1), one N(2), one N(3), and one N(5) atom to form MnN4 tetrahedra that share corners with two equivalent Ga(3)N4 tetrahedra and corners with three equivalent Mn(1)N4 trigonal pyramids. The Mn(3)-N(1) bond length is 1.85 Å. The Mn(3)-N(2) bond length is 1.76 Å. The Mn(3)-N(3) bond length is 1.84 Å. The Mn(3)-N(5) bond length is 1.89 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted water-like geometry to one N(3) and one N(5) atom. The Ga(1)-N(3) bond length is 1.99 Å. The Ga(1)-N(5) bond length is 1.96 Å. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to one Mn(2), one N(2), and two equivalent N(4) atoms. The Ga(2)-N(2) bond length is 2.01 Å. There is one shorter (2.00 Å) and one longer (2.41 Å) Ga(2)-N(4) bond length. In the third Ga site, Ga(3) is bonded to one N(1), one N(5), and two equivalent N(4) atoms to form distorted GaN4 tetrahedra that share corners with two equivalent Mn(3)N4 tetrahedra,  a cornercorner with one Mn(1)N4 trigonal pyramid,  an edgeedge with one Ga(3)N4 tetrahedra, and  an edgeedge with one Mn(1)N4 trigonal pyramid. The Ga(3)-N(1) bond length is 1.94 Å. The Ga(3)-N(5) bond length is 1.90 Å. There is one shorter (1.97 Å) and one longer (2.19 Å) Ga(3)-N(4) bond length. There are five inequivalent N sites. In the first N site, N(1) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Ga(3) atom to form NMn3Ga tetrahedra that share corners with three equivalent N(5)Mn2Ga2 tetrahedra,  a cornercorner with one N(4)MnGa4 trigonal bipyramid, corners with three equivalent N(3)Mn3Ga trigonal pyramids, and  an edgeedge with one N(4)MnGa4 trigonal bipyramid. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Ga(2) atom. In the third N site, N(3) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Ga(1) atom to form distorted NMn3Ga trigonal pyramids that share  a cornercorner with one N(5)Mn2Ga2 tetrahedra, corners with three equivalent N(1)Mn3Ga tetrahedra,  a cornercorner with one N(4)MnGa4 trigonal bipyramid, and  an edgeedge with one N(5)Mn2Ga2 tetrahedra. In the fourth N site, N(4) is bonded to one Mn(1), two equivalent Ga(2), and two equivalent Ga(3) atoms to form NMnGa4 trigonal bipyramids that share  a cornercorner with one N(1)Mn3Ga tetrahedra, corners with two equivalent N(5)Mn2Ga2 tetrahedra,  a cornercorner with one N(3)Mn3Ga trigonal pyramid,  an edgeedge with one N(1)Mn3Ga tetrahedra, and edges with two equivalent N(4)MnGa4 trigonal bipyramids. In the fifth N site, N(5) is bonded to one Mn(2), one Mn(3), one Ga(1), and one Ga(3) atom to form NMn2Ga2 tetrahedra that share corners with three equivalent N(1)Mn3Ga tetrahedra, corners with two equivalent N(4)MnGa4 trigonal bipyramids,  a cornercorner with one N(3)Mn3Ga trigonal pyramid, and  an edgeedge with one N(3)Mn3Ga trigonal pyramid.