EuBrCl crystallizes in the orthorhombic Pnma space group. Eu(1) is bonded in a 9-coordinate geometry to five equivalent Br(1) and four equivalent Cl(1) atoms. Br(1) is bonded to five equivalent Eu(1) atoms to form distorted BrEu5 trigonal bipyramids that share corners with eight equivalent Cl(1)Eu4 tetrahedra, corners with eight equivalent Br(1)Eu5 trigonal bipyramids, edges with six equivalent Cl(1)Eu4 tetrahedra, and edges with six equivalent Br(1)Eu5 trigonal bipyramids. Cl(1) is bonded to four equivalent Eu(1) atoms to form ClEu4 tetrahedra that share corners with eight equivalent Cl(1)Eu4 tetrahedra, corners with eight equivalent Br(1)Eu5 trigonal bipyramids, edges with two equivalent Cl(1)Eu4 tetrahedra, and edges with six equivalent Br(1)Eu5 trigonal bipyramids.
EuBrCl crystallizes in the orthorhombic Pnma space group. Eu(1) is bonded in a 9-coordinate geometry to five equivalent Br(1) and four equivalent Cl(1) atoms. There are a spread of Eu(1)-Br(1) bond distances ranging from 3.26-3.35 Å. There are a spread of Eu(1)-Cl(1) bond distances ranging from 2.94-2.99 Å. Br(1) is bonded to five equivalent Eu(1) atoms to form distorted BrEu5 trigonal bipyramids that share corners with eight equivalent Cl(1)Eu4 tetrahedra, corners with eight equivalent Br(1)Eu5 trigonal bipyramids, edges with six equivalent Cl(1)Eu4 tetrahedra, and edges with six equivalent Br(1)Eu5 trigonal bipyramids. Cl(1) is bonded to four equivalent Eu(1) atoms to form ClEu4 tetrahedra that share corners with eight equivalent Cl(1)Eu4 tetrahedra, corners with eight equivalent Br(1)Eu5 trigonal bipyramids, edges with two equivalent Cl(1)Eu4 tetrahedra, and edges with six equivalent Br(1)Eu5 trigonal bipyramids.