Materials Data on Ho2Ga8Co by Materials Project
Ho2CoGa8 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Ho is bonded to twelve Ga atoms to form HoGa12 cuboctahedra that share corners with eight equivalent HoGa12 cuboctahedra, edges with twelve GaHo4Ga8 cuboctahedra, faces with five equivalent HoGa12 cuboctahedra, and faces with eight GaHo4Ga8 cuboctahedra. There are a spread of Ho–Ga bond distances ranging from 2.98–3.02 Å. Co is bonded in a body-centered cubic geometry to eight Ga atoms. All Co–Ga bond lengths are 2.48 Å. There are five inequivalent Ga sites. In the first Ga site, Ga is bonded to four equivalent Ho and eight Ga atoms to form distorted GaHo4Ga8 cuboctahedra that share corners with four equivalent GaHo4Ga8 cuboctahedra, edges with eight equivalent HoGa12 cuboctahedra, edges with eight equivalent GaHo4Ga8 cuboctahedra, faces with four equivalent HoGa12 cuboctahedra, and faces with twelve GaHo4Ga8 cuboctahedra. There are four shorter (2.99 Å) and four longer (3.04 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 4-coordinate geometry to two equivalent Ho, two equivalent Co, and seven Ga atoms. There are a spread of Ga–Ga bond distances ranging from 2.59–2.99 Å. In the third Ga site, Ga is bonded in a 4-coordinate geometry to two equivalent Ho, two equivalent Co, and seven Ga atoms. There are one shorter (2.59 Å) and two longer (2.97 Å) Ga–Ga bond lengths. In the fourth Ga site, Ga is bonded to four equivalent Ho and eight Ga atoms to form distorted GaHo4Ga8 cuboctahedra that share corners with eight equivalent GaHo4Ga8 cuboctahedra, edges with four equivalent HoGa12 cuboctahedra, edges with eight equivalent GaHo4Ga8 cuboctahedra, faces with four equivalent HoGa12 cuboctahedra, and faces with nine GaHo4Ga8 cuboctahedra. Both Ga–Ga bond lengths are 2.97 Å. In the fifth Ga site, Ga is bonded in a 4-coordinate geometry to two equivalent Ho, two equivalent Co, and seven Ga atoms. Both Ga–Ho bond lengths are 2.98 Å. All Ga–Ga bond lengths are 2.99 Å.