Eu8In3 crystallizes in the triclinic P-1 space group. There are eight inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 3-coordinate geometry to one In(2) and two equivalent In(1) atoms. In the second Eu site, Eu(2) is bonded in a 4-coordinate geometry to one In(1), one In(3), and two equivalent In(2) atoms. In the third Eu site, Eu(3) is bonded in a 4-coordinate geometry to one In(2), one In(4), and two equivalent In(1) atoms. In the fourth Eu site, Eu(4) is bonded in a 4-coordinate geometry to one In(1), one In(3), and two equivalent In(2) atoms. In the fifth Eu site, Eu(5) is bonded in a 4-coordinate geometry to one In(3), one In(4), and two equivalent In(1) atoms. In the sixth Eu site, Eu(6) is bonded in a 4-coordinate geometry to one In(3), one In(4), and two equivalent In(2) atoms. In the seventh Eu site, Eu(7) is bonded in a distorted trigonal non-coplanar geometry to one In(1), one In(2), and one In(4) atom. In the eighth Eu site, Eu(8) is bonded in a distorted trigonal non-coplanar geometry to one In(1), one In(2), and one In(4) atom. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to one Eu(2), one Eu(4), one Eu(7), one Eu(8), two equivalent Eu(1), two equivalent Eu(3), and two equivalent Eu(5) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to one Eu(1), one Eu(3), one Eu(7), one Eu(8), two equivalent Eu(2), two equivalent Eu(4), and two equivalent Eu(6) atoms. In the third In site, In(3) is bonded in a body-centered cubic geometry to two equivalent Eu(2), two equivalent Eu(4), two equivalent Eu(5), and two equivalent Eu(6) atoms. In the fourth In site, In(4) is bonded in a distorted q6 geometry to two equivalent Eu(3), two equivalent Eu(5), two equivalent Eu(6), two equivalent Eu(7), and two equivalent Eu(8) atoms.
Eu8In3 crystallizes in the triclinic P-1 space group. There are eight inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 3-coordinate geometry to one In(2) and two equivalent In(1) atoms. The Eu(1)-In(2) bond length is 3.84 Å. There is one shorter (3.49 Å) and one longer (3.50 Å) Eu(1)-In(1) bond length. In the second Eu site, Eu(2) is bonded in a 4-coordinate geometry to one In(1), one In(3), and two equivalent In(2) atoms. The Eu(2)-In(1) bond length is 3.73 Å. The Eu(2)-In(3) bond length is 3.42 Å. There is one shorter (3.31 Å) and one longer (3.78 Å) Eu(2)-In(2) bond length. In the third Eu site, Eu(3) is bonded in a 4-coordinate geometry to one In(2), one In(4), and two equivalent In(1) atoms. The Eu(3)-In(2) bond length is 3.57 Å. The Eu(3)-In(4) bond length is 3.67 Å. There is one shorter (3.42 Å) and one longer (3.67 Å) Eu(3)-In(1) bond length. In the fourth Eu site, Eu(4) is bonded in a 4-coordinate geometry to one In(1), one In(3), and two equivalent In(2) atoms. The Eu(4)-In(1) bond length is 3.67 Å. The Eu(4)-In(3) bond length is 3.37 Å. There is one shorter (3.37 Å) and one longer (3.74 Å) Eu(4)-In(2) bond length. In the fifth Eu site, Eu(5) is bonded in a 4-coordinate geometry to one In(3), one In(4), and two equivalent In(1) atoms. The Eu(5)-In(3) bond length is 3.35 Å. The Eu(5)-In(4) bond length is 3.66 Å. There is one shorter (3.40 Å) and one longer (3.76 Å) Eu(5)-In(1) bond length. In the sixth Eu site, Eu(6) is bonded in a 4-coordinate geometry to one In(3), one In(4), and two equivalent In(2) atoms. The Eu(6)-In(3) bond length is 3.38 Å. The Eu(6)-In(4) bond length is 3.66 Å. There is one shorter (3.37 Å) and one longer (3.86 Å) Eu(6)-In(2) bond length. In the seventh Eu site, Eu(7) is bonded in a distorted trigonal non-coplanar geometry to one In(1), one In(2), and one In(4) atom. The Eu(7)-In(1) bond length is 3.47 Å. The Eu(7)-In(2) bond length is 3.42 Å. The Eu(7)-In(4) bond length is 3.53 Å. In the eighth Eu site, Eu(8) is bonded in a distorted trigonal non-coplanar geometry to one In(1), one In(2), and one In(4) atom. The Eu(8)-In(1) bond length is 3.46 Å. The Eu(8)-In(2) bond length is 3.41 Å. The Eu(8)-In(4) bond length is 3.59 Å. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to one Eu(2), one Eu(4), one Eu(7), one Eu(8), two equivalent Eu(1), two equivalent Eu(3), and two equivalent Eu(5) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to one Eu(1), one Eu(3), one Eu(7), one Eu(8), two equivalent Eu(2), two equivalent Eu(4), and two equivalent Eu(6) atoms. In the third In site, In(3) is bonded in a body-centered cubic geometry to two equivalent Eu(2), two equivalent Eu(4), two equivalent Eu(5), and two equivalent Eu(6) atoms. In the fourth In site, In(4) is bonded in a distorted q6 geometry to two equivalent Eu(3), two equivalent Eu(5), two equivalent Eu(6), two equivalent Eu(7), and two equivalent Eu(8) atoms.