AgErSn2 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. Er(1) is bonded to four equivalent Ag(1) and eight equivalent Sn(1) atoms to form ErAg4Sn8 cuboctahedra that share corners with twelve equivalent Er(1)Ag4Sn8 cuboctahedra, edges with eight equivalent Ag(1)Er4Sn8 cuboctahedra, edges with sixteen equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Ag(1)Er4Sn8 cuboctahedra, faces with six equivalent Er(1)Ag4Sn8 cuboctahedra, and faces with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra. Ag(1) is bonded to four equivalent Er(1) and eight equivalent Sn(1) atoms to form AgEr4Sn8 cuboctahedra that share corners with twelve equivalent Ag(1)Er4Sn8 cuboctahedra, edges with eight equivalent Er(1)Ag4Sn8 cuboctahedra, edges with sixteen equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Er(1)Ag4Sn8 cuboctahedra, faces with six equivalent Ag(1)Er4Sn8 cuboctahedra, and faces with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra. Sn(1) is bonded to four equivalent Er(1), four equivalent Ag(1), and four equivalent Sn(1) atoms to form distorted SnEr4Ag4Sn4 cuboctahedra that share corners with twelve equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, edges with eight equivalent Er(1)Ag4Sn8 cuboctahedra, edges with eight equivalent Ag(1)Er4Sn8 cuboctahedra, edges with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Er(1)Ag4Sn8 cuboctahedra, faces with four equivalent Ag(1)Er4Sn8 cuboctahedra, and faces with ten equivalent Sn(1)Er4Ag4Sn4 cuboctahedra.
AgErSn2 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. Er(1) is bonded to four equivalent Ag(1) and eight equivalent Sn(1) atoms to form ErAg4Sn8 cuboctahedra that share corners with twelve equivalent Er(1)Ag4Sn8 cuboctahedra, edges with eight equivalent Ag(1)Er4Sn8 cuboctahedra, edges with sixteen equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Ag(1)Er4Sn8 cuboctahedra, faces with six equivalent Er(1)Ag4Sn8 cuboctahedra, and faces with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra. All Er(1)-Ag(1) bond lengths are 3.26 Å. All Er(1)-Sn(1) bond lengths are 3.16 Å. Ag(1) is bonded to four equivalent Er(1) and eight equivalent Sn(1) atoms to form AgEr4Sn8 cuboctahedra that share corners with twelve equivalent Ag(1)Er4Sn8 cuboctahedra, edges with eight equivalent Er(1)Ag4Sn8 cuboctahedra, edges with sixteen equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Er(1)Ag4Sn8 cuboctahedra, faces with six equivalent Ag(1)Er4Sn8 cuboctahedra, and faces with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra. All Ag(1)-Sn(1) bond lengths are 3.16 Å. Sn(1) is bonded to four equivalent Er(1), four equivalent Ag(1), and four equivalent Sn(1) atoms to form distorted SnEr4Ag4Sn4 cuboctahedra that share corners with twelve equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, edges with eight equivalent Er(1)Ag4Sn8 cuboctahedra, edges with eight equivalent Ag(1)Er4Sn8 cuboctahedra, edges with eight equivalent Sn(1)Er4Ag4Sn4 cuboctahedra, faces with four equivalent Er(1)Ag4Sn8 cuboctahedra, faces with four equivalent Ag(1)Er4Sn8 cuboctahedra, and faces with ten equivalent Sn(1)Er4Ag4Sn4 cuboctahedra. All Sn(1)-Sn(1) bond lengths are 3.26 Å.