Dy3ReB7 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 11-coordinate geometry to two equivalent B(2), two equivalent B(4), three equivalent B(1), and four equivalent B(3) atoms. In the second Dy site, Dy(2) is bonded in a 10-coordinate geometry to one B(4), four equivalent B(2), and six equivalent B(1) atoms. Re(1) is bonded in a 10-coordinate geometry to two equivalent B(4), four equivalent B(2), and four equivalent B(3) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Dy(2), one B(2), and two equivalent B(1) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), two equivalent Re(1), one B(1), one B(2), and one B(3) atom. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Re(1), one B(2), one B(3), and one B(4) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to one Dy(2), four equivalent Dy(1), two equivalent Re(1), and two equivalent B(3) atoms.
Dy3ReB7 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 11-coordinate geometry to two equivalent B(2), two equivalent B(4), three equivalent B(1), and four equivalent B(3) atoms. Both Dy(1)-B(2) bond lengths are 2.68 Å. Both Dy(1)-B(4) bond lengths are 2.70 Å. There is one shorter (2.66 Å) and two longer (2.75 Å) Dy(1)-B(1) bond lengths. There are two shorter (2.65 Å) and two longer (2.68 Å) Dy(1)-B(3) bond lengths. In the second Dy site, Dy(2) is bonded in a 10-coordinate geometry to one B(4), four equivalent B(2), and six equivalent B(1) atoms. The Dy(2)-B(4) bond length is 3.40 Å. All Dy(2)-B(2) bond lengths are 2.65 Å. All Dy(2)-B(1) bond lengths are 2.70 Å. Re(1) is bonded in a 10-coordinate geometry to two equivalent B(4), four equivalent B(2), and four equivalent B(3) atoms. Both Re(1)-B(4) bond lengths are 2.33 Å. All Re(1)-B(2) bond lengths are 2.36 Å. All Re(1)-B(3) bond lengths are 2.34 Å. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Dy(2), one B(2), and two equivalent B(1) atoms. The B(1)-B(2) bond length is 1.86 Å. Both B(1)-B(1) bond lengths are 2.01 Å. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), two equivalent Re(1), one B(1), one B(2), and one B(3) atom. The B(2)-B(2) bond length is 1.86 Å. The B(2)-B(3) bond length is 1.84 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Re(1), one B(2), one B(3), and one B(4) atom. The B(3)-B(3) bond length is 1.90 Å. The B(3)-B(4) bond length is 1.76 Å. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to one Dy(2), four equivalent Dy(1), two equivalent Re(1), and two equivalent B(3) atoms.