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ErZn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Er is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. All Er–Zn bond lengths are 3.07 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Er atoms.
ErZn5 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Er is bonded in a 10-coordinate geometry to fourteen Zn atoms. There are a spread of Er–Zn bond distances ranging from 3.04–3.30 Å. There are five inequivalent Zn sites. In the first Zn site, Zn is bonded in a 6-coordinate geometry to six equivalent Zn atoms. All Zn–Zn bond lengths are 2.61 Å. In the second Zn site, Zn is bonded in a 12-coordinate geometry to three equivalent Er and nine Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.57–2.87 Å. In the third Zn site, Zn is bonded to four equivalent Er and eight Zn atoms to form ZnEr4Zn8 cuboctahedra that share corners with fourteen ZnEr4Zn8 cuboctahedra, edges with four equivalent ZnEr3Zn9 cuboctahedra, and faces with fourteen ZnEr4Zn8 cuboctahedra. There are two shorter (2.49 Å) and four longer (2.74 Å) Zn–Zn bond lengths. In the fourth Zn site, Zn is bonded in a 12-coordinate geometry to two equivalent Er and ten Zn atoms. There are two shorter (2.63 Å) and four longer (2.71 Å) Zn–Zn bond lengths. In the fifth Zn site, Zn is bonded to three equivalent Er and nine Zn atoms to form distorted ZnEr3Zn9 cuboctahedra that share corners with thirteen ZnEr4Zn8 cuboctahedra, edges with six ZnEr3Zn9 cuboctahedra, and faces with eleven ZnEr4Zn8 cuboctahedra. There are one shorter (2.84 Å) and two longer (2.98 Å) Zn–Zn bond lengths.
ErZn12 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Er is bonded in a 12-coordinate geometry to twenty Zn atoms. There are a spread of Er–Zn bond distances ranging from 3.15–3.40 Å. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a distorted q6 geometry to two equivalent Er and ten Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.59–2.87 Å. In the second Zn site, Zn is bonded to two equivalent Er and ten Zn atoms to form a mixture of corner, edge, and face-sharing ZnEr2Zn10 cuboctahedra. There are two shorter (2.59 Å) and four longer (2.73 Å) Zn–Zn bond lengths. In the third Zn site, Zn is bonded in a 10-coordinate geometry to one Er and nine Zn atoms. The Zn–Zn bond length is 2.60 Å.
Er6Zn23 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Er is bonded in a 12-coordinate geometry to twelve Zn atoms. There are a spread of Er–Zn bond distances ranging from 3.08–3.21 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded in a 10-coordinate geometry to three equivalent Er and seven Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.69–2.76 Å. In the second Zn site, Zn is bonded in a 12-coordinate geometry to three equivalent Er and nine Zn atoms. There are three shorter (2.58 Å) and three longer (2.84 Å) Zn–Zn bond lengths. In the third Zn site, Zn is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. In the fourth Zn site, Zn is bonded to four equivalent Er and eight Zn atoms to form a mixture of corner and face-sharing ZnEr4Zn8 cuboctahedra.
Er2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Er is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Er–Zn bond distances ranging from 3.10–3.45 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Er and nine Zn atoms to form distorted ZnEr3Zn9 cuboctahedra that share corners with twenty-three ZnEr2Zn10 cuboctahedra, edges with ten ZnEr2Zn10 cuboctahedra, and faces with twenty ZnEr3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.53–2.86 Å. In the second Zn site, Zn is bonded in a 2-coordinate geometry to one Er and thirteen Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.65–2.98 Å. In the third Zn site, Zn is bonded to two equivalent Er and ten Zn atoms to form ZnEr2Zn10 cuboctahedra that share corners with twenty-two ZnEr2Zn10 cuboctahedra, edges with ten ZnEr2Zn10 cuboctahedra, and faces with eighteen ZnEr3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.59 Å. In the fourth Zn site, Zn is bonded to two equivalent Er and ten Zn atoms to form distorted ZnEr2Zn10 cuboctahedra that share corners with twenty-four ZnEr2Zn10 cuboctahedra, edges with five ZnEr2Zn10 cuboctahedra, and faces with twenty-one ZnEr3Zn9 cuboctahedra. Both Zn–Zn bond lengths are 2.67 Å.
ErZn5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Er is bonded in a 6-coordinate geometry to eighteen Zn atoms. There are six shorter (3.05 Å) and twelve longer (3.38 Å) Er–Zn bond lengths. There are two inequivalent Zn sites. In the first Zn site, Zn is bonded to four equivalent Er and eight Zn atoms to form a mixture of corner, edge, and face-sharing ZnEr4Zn8 cuboctahedra. There are four shorter (2.61 Å) and four longer (2.64 Å) Zn–Zn bond lengths. In the second Zn site, Zn is bonded in a 12-coordinate geometry to three equivalent Er and six equivalent Zn atoms.
ErZn2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Er is bonded in a 12-coordinate geometry to twelve equivalent Zn atoms. There are a spread of Er–Zn bond distances ranging from 3.05–3.20 Å. Zn is bonded in a 10-coordinate geometry to six equivalent Er and four equivalent Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.56–2.89 Å.