NaErCl4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent Cl(2) and four equivalent Cl(1) atoms to form NaCl6 octahedra that share corners with eight equivalent Er(1)Cl6 octahedra and edges with two equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. Er(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form ErCl6 octahedra that share corners with eight equivalent Na(1)Cl6 octahedra and edges with two equivalent Er(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Er(1) atom. In the second Cl site, Cl(2) is bonded in a trigonal planar geometry to one Na(1) and two equivalent Er(1) atoms.
NaErCl4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Na(1) is bonded to two equivalent Cl(2) and four equivalent Cl(1) atoms to form NaCl6 octahedra that share corners with eight equivalent Er(1)Cl6 octahedra and edges with two equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. Both Na(1)-Cl(2) bond lengths are 2.88 Å. There are two shorter (2.74 Å) and two longer (2.79 Å) Na(1)-Cl(1) bond lengths. Er(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form ErCl6 octahedra that share corners with eight equivalent Na(1)Cl6 octahedra and edges with two equivalent Er(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. Both Er(1)-Cl(1) bond lengths are 2.52 Å. There are two shorter (2.64 Å) and two longer (2.72 Å) Er(1)-Cl(2) bond lengths. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Er(1) atom. In the second Cl site, Cl(2) is bonded in a trigonal planar geometry to one Na(1) and two equivalent Er(1) atoms.