Sc5(Re2Si3)4 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 13-coordinate geometry to one Re(1), one Re(5), one Re(6), three equivalent Re(2), one Si(1), one Si(2), one Si(3), one Si(8), two equivalent Si(7), and two equivalent Si(9) atoms. In the second Sc site, Sc(2) is bonded in a 4-coordinate geometry to two equivalent Re(5), four equivalent Re(3), two equivalent Si(4), two equivalent Si(5), and four equivalent Si(1) atoms. In the third Sc site, Sc(3) is bonded in a 7-coordinate geometry to one Re(2), one Re(3), one Re(5), one Re(6), two equivalent Re(4), one Si(4), one Si(5), one Si(6), one Si(9), two equivalent Si(1), and two equivalent Si(7) atoms. In the fourth Sc site, Sc(4) is bonded in a 8-coordinate geometry to two equivalent Re(1), two equivalent Re(6), two equivalent Si(3), two equivalent Si(8), and four equivalent Si(9) atoms. There are six inequivalent Re sites. In the first Re site, Re(1) is bonded in a 10-coordinate geometry to one Sc(4), two equivalent Sc(1), one Si(2), two equivalent Si(3), two equivalent Si(8), and two equivalent Si(9) atoms. In the second Re site, Re(2) is bonded in a 10-coordinate geometry to one Sc(3), three equivalent Sc(1), one Si(8), one Si(9), two equivalent Si(2), and two equivalent Si(7) atoms. In the third Re site, Re(3) is bonded in a 11-coordinate geometry to two equivalent Sc(2), two equivalent Sc(3), one Si(6), two equivalent Si(1), two equivalent Si(4), and two equivalent Si(5) atoms. In the fourth Re site, Re(4) is bonded in a 8-coordinate geometry to two equivalent Sc(3), one Si(1), one Si(5), two equivalent Si(6), and two equivalent Si(7) atoms. In the fifth Re site, Re(5) is bonded in a 13-coordinate geometry to one Sc(2), two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(6), one Si(3), one Si(4), two equivalent Si(1), and two equivalent Si(9) atoms. In the sixth Re site, Re(6) is bonded in a 13-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(5), one Si(3), one Si(4), two equivalent Si(1), and two equivalent Si(9) atoms. There are nine inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to one Sc(1), one Sc(2), two equivalent Sc(3), one Re(3), one Re(4), one Re(5), one Re(6), one Si(4), and one Si(5) atom. In the second Si site, Si(2) is bonded in a 11-coordinate geometry to two equivalent Sc(1), one Re(1), four equivalent Re(2), two equivalent Si(2), and two equivalent Si(8) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Sc(4), two equivalent Sc(1), one Re(5), one Re(6), two equivalent Re(1), and two equivalent Si(9) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Sc(2), two equivalent Sc(3), one Re(5), one Re(6), two equivalent Re(3), and two equivalent Si(1) atoms. In the fifth Si site, Si(5) is bonded in a 10-coordinate geometry to one Sc(2), two equivalent Sc(3), two equivalent Re(3), two equivalent Re(4), one Si(6), and two equivalent Si(1) atoms. In the sixth Si site, Si(6) is bonded in a 8-coordinate geometry to two equivalent Sc(3), one Re(3), four equivalent Re(4), and one Si(5) atom. In the seventh Si site, Si(7) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(2), two equivalent Re(4), and two equivalent Si(7) atoms. In the eighth Si site, Si(8) is bonded in a 11-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Re(1), two equivalent Re(2), two equivalent Si(2), and two equivalent Si(9) atoms. In the ninth Si site, Si(9) is bonded in a 10-coordinate geometry to one Sc(3), one Sc(4), two equivalent Sc(1), one Re(1), one Re(2), one Re(5), one Re(6), one Si(3), and one Si(8) atom.
Sc5(Re2Si3)4 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 13-coordinate geometry to one Re(1), one Re(5), one Re(6), three equivalent Re(2), one Si(1), one Si(2), one Si(3), one Si(8), two equivalent Si(7), and two equivalent Si(9) atoms. The Sc(1)-Re(1) bond length is 2.89 Å. The Sc(1)-Re(5) bond length is 3.35 Å. The Sc(1)-Re(6) bond length is 2.99 Å. There are a spread of Sc(1)-Re(2) bond distances ranging from 3.00-3.20 Å. The Sc(1)-Si(1) bond length is 2.82 Å. The Sc(1)-Si(2) bond length is 3.13 Å. The Sc(1)-Si(3) bond length is 2.95 Å. The Sc(1)-Si(8) bond length is 2.84 Å. There is one shorter (2.87 Å) and one longer (2.89 Å) Sc(1)-Si(7) bond length. There is one shorter (2.82 Å) and one longer (2.89 Å) Sc(1)-Si(9) bond length. In the second Sc site, Sc(2) is bonded in a 4-coordinate geometry to two equivalent Re(5), four equivalent Re(3), two equivalent Si(4), two equivalent Si(5), and four equivalent Si(1) atoms. Both Sc(2)-Re(5) bond lengths are 3.34 Å. There are two shorter (3.06 Å) and two longer (3.15 Å) Sc(2)-Re(3) bond lengths. Both Sc(2)-Si(4) bond lengths are 2.69 Å. Both Sc(2)-Si(5) bond lengths are 2.60 Å. All Sc(2)-Si(1) bond lengths are 2.93 Å. In the third Sc site, Sc(3) is bonded in a 7-coordinate geometry to one Re(2), one Re(3), one Re(5), one Re(6), two equivalent Re(4), one Si(4), one Si(5), one Si(6), one Si(9), two equivalent Si(1), and two equivalent Si(7) atoms. The Sc(3)-Re(2) bond length is 3.21 Å. The Sc(3)-Re(3) bond length is 3.00 Å. The Sc(3)-Re(5) bond length is 3.00 Å. The Sc(3)-Re(6) bond length is 3.37 Å. Both Sc(3)-Re(4) bond lengths are 3.09 Å. The Sc(3)-Si(4) bond length is 2.82 Å. The Sc(3)-Si(5) bond length is 2.83 Å. The Sc(3)-Si(6) bond length is 3.02 Å. The Sc(3)-Si(9) bond length is 2.78 Å. There is one shorter (2.84 Å) and one longer (2.89 Å) Sc(3)-Si(1) bond length. Both Sc(3)-Si(7) bond lengths are 2.81 Å. In the fourth Sc site, Sc(4) is bonded in a 8-coordinate geometry to two equivalent Re(1), two equivalent Re(6), two equivalent Si(3), two equivalent Si(8), and four equivalent Si(9) atoms. Both Sc(4)-Re(1) bond lengths are 3.15 Å. Both Sc(4)-Re(6) bond lengths are 3.21 Å. Both Sc(4)-Si(3) bond lengths are 2.69 Å. Both Sc(4)-Si(8) bond lengths are 2.77 Å. All Sc(4)-Si(9) bond lengths are 2.89 Å. There are six inequivalent Re sites. In the first Re site, Re(1) is bonded in a 10-coordinate geometry to one Sc(4), two equivalent Sc(1), one Si(2), two equivalent Si(3), two equivalent Si(8), and two equivalent Si(9) atoms. The Re(1)-Si(2) bond length is 2.38 Å. Both Re(1)-Si(3) bond lengths are 2.55 Å. There is one shorter (2.70 Å) and one longer (2.76 Å) Re(1)-Si(8) bond length. Both Re(1)-Si(9) bond lengths are 2.51 Å. In the second Re site, Re(2) is bonded in a 10-coordinate geometry to one Sc(3), three equivalent Sc(1), one Si(8), one Si(9), two equivalent Si(2), and two equivalent Si(7) atoms. The Re(2)-Si(8) bond length is 2.53 Å. The Re(2)-Si(9) bond length is 2.48 Å. There is one shorter (2.47 Å) and one longer (2.54 Å) Re(2)-Si(2) bond length. There is one shorter (2.47 Å) and one longer (2.49 Å) Re(2)-Si(7) bond length. In the third Re site, Re(3) is bonded in a 11-coordinate geometry to two equivalent Sc(2), two equivalent Sc(3), one Si(6), two equivalent Si(1), two equivalent Si(4), and two equivalent Si(5) atoms. The Re(3)-Si(6) bond length is 2.50 Å. Both Re(3)-Si(1) bond lengths are 2.52 Å. Both Re(3)-Si(4) bond lengths are 2.50 Å. There is one shorter (2.71 Å) and one longer (2.84 Å) Re(3)-Si(5) bond length. In the fourth Re site, Re(4) is bonded in a 8-coordinate geometry to two equivalent Sc(3), one Si(1), one Si(5), two equivalent Si(6), and two equivalent Si(7) atoms. The Re(4)-Si(1) bond length is 2.49 Å. The Re(4)-Si(5) bond length is 2.47 Å. There is one shorter (2.46 Å) and one longer (2.48 Å) Re(4)-Si(6) bond length. Both Re(4)-Si(7) bond lengths are 2.54 Å. In the fifth Re site, Re(5) is bonded in a 13-coordinate geometry to one Sc(2), two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(6), one Si(3), one Si(4), two equivalent Si(1), and two equivalent Si(9) atoms. There is one shorter (2.67 Å) and one longer (2.75 Å) Re(5)-Re(6) bond length. The Re(5)-Si(3) bond length is 2.50 Å. The Re(5)-Si(4) bond length is 2.42 Å. Both Re(5)-Si(1) bond lengths are 2.43 Å. Both Re(5)-Si(9) bond lengths are 2.64 Å. In the sixth Re site, Re(6) is bonded in a 13-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(5), one Si(3), one Si(4), two equivalent Si(1), and two equivalent Si(9) atoms. The Re(6)-Si(3) bond length is 2.52 Å. The Re(6)-Si(4) bond length is 2.42 Å. Both Re(6)-Si(1) bond lengths are 2.68 Å. Both Re(6)-Si(9) bond lengths are 2.45 Å. There are nine inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to one Sc(1), one Sc(2), two equivalent Sc(3), one Re(3), one Re(4), one Re(5), one Re(6), one Si(4), and one Si(5) atom. The Si(1)-Si(4) bond length is 2.51 Å. The Si(1)-Si(5) bond length is 2.76 Å. In the second Si site, Si(2) is bonded in a 11-coordinate geometry to two equivalent Sc(1), one Re(1), four equivalent Re(2), two equivalent Si(2), and two equivalent Si(8) atoms. Both Si(2)-Si(2) bond lengths are 2.87 Å. There is one shorter (2.74 Å) and one longer (2.77 Å) Si(2)-Si(8) bond length. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Sc(4), two equivalent Sc(1), one Re(5), one Re(6), two equivalent Re(1), and two equivalent Si(9) atoms. Both Si(3)-Si(9) bond lengths are 2.52 Å. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Sc(2), two equivalent Sc(3), one Re(5), one Re(6), two equivalent Re(3), and two equivalent Si(1) atoms. In the fifth Si site, Si(5) is bonded in a 10-coordinate geometry to one Sc(2), two equivalent Sc(3), two equivalent Re(3), two equivalent Re(4), one Si(6), and two equivalent Si(1) atoms. The Si(5)-Si(6) bond length is 2.50 Å. In the sixth Si site, Si(6) is bonded in a 8-coordinate geometry to two equivalent Sc(3), one Re(3), four equivalent Re(4), and one Si(5) atom. In the seventh Si site, Si(7) is bonded in a 10-coordinate geometry to two equivalent Sc(1), two equivalent Sc(3), two equivalent Re(2), two equivalent Re(4), and two equivalent Si(7) atoms. Both Si(7)-Si(7) bond lengths are 2.62 Å. In the eighth Si site, Si(8) is bonded in a 11-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Re(1), two equivalent Re(2), two equivalent Si(2), and two equivalent Si(9) atoms. Both Si(8)-Si(9) bond lengths are 2.75 Å. In the ninth Si site, Si(9) is bonded in a 10-coordinate geometry to one Sc(3), one Sc(4), two equivalent Sc(1), one Re(1), one Re(2), one Re(5), one Re(6), one Si(3), and one Si(8) atom.