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EuIn2 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to twelve equivalent In atoms. There are six shorter (3.32 Å) and six longer (3.72 Å) Eu–In bond lengths. In is bonded in a 10-coordinate geometry to six equivalent Eu and four equivalent In atoms. There are three shorter (3.01 Å) and one longer (3.16 Å) In–In bond lengths.
EuIn4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Eu is bonded in a 1-coordinate geometry to fifteen In atoms. There are a spread of Eu–In bond distances ranging from 3.51–3.98 Å. There are four inequivalent In sites. In the first In site, In is bonded in a 8-coordinate geometry to three equivalent Eu and five In atoms. There are a spread of In–In bond distances ranging from 2.95–3.24 Å. In the second In site, In is bonded in a 8-coordinate geometry to four equivalent Eu and four In atoms. There are a spread of In–In bond distances ranging from 2.95–3.11 Å. In the third In site, In is bonded in a 10-coordinate geometry to five equivalent Eu and five In atoms. The In–In bond length is 2.85 Å. In the fourth In site, In is bonded in a distorted body-centered cubic geometry to three equivalent Eu and five In atoms. The In–In bond length is 3.45 Å.
Eu3In is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to eight equivalent Eu and four equivalent In atoms. There are a spread of Eu–Eu bond distances ranging from 3.54–3.91 Å. There are two shorter (3.55 Å) and two longer (3.73 Å) Eu–In bond lengths. In is bonded to twelve equivalent Eu atoms to form a mixture of corner and face-sharing InEu12 cuboctahedra.
Eu8In3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are eight inequivalent Eu sites. In the first Eu site, Eu is bonded in a 3-coordinate geometry to three In atoms. There are a spread of Eu–In bond distances ranging from 3.49–3.84 Å. In the second Eu site, Eu is bonded in a 4-coordinate geometry to four In atoms. There are a spread of Eu–In bond distances ranging from 3.31–3.78 Å. In the third Eu site, Eu is bonded in a 4-coordinate geometry to four In atoms. There are a spread of Eu–In bond distances ranging from 3.42–3.67 Å. In the fourth Eu site, Eu is bonded in a 4-coordinate geometry to four In atoms. There are a spread of Eu–In bond distances ranging from 3.37–3.74 Å. In the fifth Eu site, Eu is bonded in a 4-coordinate geometry to four In atoms. There are a spread of Eu–In bond distances ranging from 3.35–3.76 Å. In the sixth Eu site, Eu is bonded in a 2-coordinate geometry to four In atoms. There are a spread of Eu–In bond distances ranging from 3.37–3.86 Å. In the seventh Eu site, Eu is bonded in a distorted trigonal non-coplanar geometry to three In atoms. There are a spread of Eu–In bond distances ranging from 3.42–3.53 Å. In the eighth Eu site, Eu is bonded in a distorted trigonal non-coplanar geometry to three In atoms. There are a spread of Eu–In bond distances ranging from 3.41–3.59 Å. There are four inequivalent In sites. In the first In site, In is bonded in a 10-coordinate geometry to ten Eu atoms. In the second In site, In is bonded in a 10-coordinate geometry to ten Eu atoms. In the third In site, In is bonded in a body-centered cubic geometry to eight Eu atoms. In the fourth In site, In is bonded in a distorted q6 geometry to ten Eu atoms.
EuIn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Eu is bonded to twelve equivalent In atoms to form EuIn12 cuboctahedra that share corners with twelve equivalent EuIn12 cuboctahedra, edges with twenty-four equivalent InEu4In8 cuboctahedra, faces with six equivalent EuIn12 cuboctahedra, and faces with twelve equivalent InEu4In8 cuboctahedra. All Eu–In bond lengths are 3.33 Å. In is bonded to four equivalent Eu and eight equivalent In atoms to form distorted InEu4In8 cuboctahedra that share corners with twelve equivalent InEu4In8 cuboctahedra, edges with eight equivalent EuIn12 cuboctahedra, edges with sixteen equivalent InEu4In8 cuboctahedra, faces with four equivalent EuIn12 cuboctahedra, and faces with fourteen equivalent InEu4In8 cuboctahedra. All In–In bond lengths are 3.33 Å.
EuIn is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Eu is bonded in a body-centered cubic geometry to eight equivalent In atoms. All Eu–In bond lengths are 3.44 Å. In is bonded in a body-centered cubic geometry to eight equivalent Eu atoms.
Eu2In is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Eu sites. In the first Eu site, Eu is bonded in a 5-coordinate geometry to five equivalent In atoms. There are three shorter (3.45 Å) and two longer (3.82 Å) Eu–In bond lengths. In the second Eu site, Eu is bonded in a 4-coordinate geometry to five equivalent In atoms. There are a spread of Eu–In bond distances ranging from 3.32–4.00 Å. In is bonded in a 10-coordinate geometry to ten Eu atoms.