Re4Si7 crystallizes in the monoclinic Cm space group. There are eight inequivalent Re sites. In the first Re site, Re(1) is bonded in a 9-coordinate geometry to one Si(8), two equivalent Si(11), two equivalent Si(5), two equivalent Si(7), and two equivalent Si(9) atoms. In the second Re site, Re(2) is bonded in a 8-coordinate geometry to one Si(12), one Si(9), two equivalent Si(14), two equivalent Si(2), and two equivalent Si(8) atoms. In the third Re site, Re(3) is bonded in a 8-coordinate geometry to one Si(10), one Si(3), two equivalent Si(11), two equivalent Si(13), and two equivalent Si(6) atoms. In the fourth Re site, Re(4) is bonded in a 9-coordinate geometry to one Si(6), two equivalent Si(1), two equivalent Si(10), two equivalent Si(12), and two equivalent Si(4) atoms. In the fifth Re site, Re(5) is bonded in a 8-coordinate geometry to one Si(14), one Si(2), two equivalent Si(4), two equivalent Si(7), and two equivalent Si(9) atoms. In the sixth Re site, Re(6) is bonded in a 8-coordinate geometry to one Si(13), one Si(5), two equivalent Si(1), two equivalent Si(10), and two equivalent Si(3) atoms. In the seventh Re site, Re(7) is bonded in a 8-coordinate geometry to one Si(11), one Si(7), two equivalent Si(14), two equivalent Si(3), and two equivalent Si(8) atoms. In the eighth Re site, Re(8) is bonded in a 8-coordinate geometry to one Si(1), one Si(4), two equivalent Si(13), two equivalent Si(2), and two equivalent Si(6) atoms. There are fourteen inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Re(8), two equivalent Re(4), two equivalent Re(6), one Si(10), one Si(12), and two equivalent Si(13) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Re(5), two equivalent Re(2), two equivalent Re(8), two equivalent Si(4), and two equivalent Si(9) atoms. In the third Si site, Si(3) is bonded in a distorted q6 geometry to one Re(3), two equivalent Re(6), two equivalent Re(7), two equivalent Si(11), and two equivalent Si(13) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Re(8), two equivalent Re(4), two equivalent Re(5), two equivalent Si(2), and two equivalent Si(6) atoms. In the fifth Si site, Si(5) is bonded in a 4-coordinate geometry to one Re(6), two equivalent Re(1), one Si(7), and two equivalent Si(10) atoms. In the sixth Si site, Si(6) is bonded in a distorted q6 geometry to one Re(4), two equivalent Re(3), two equivalent Re(8), one Si(13), two equivalent Si(10), and two equivalent Si(4) atoms. In the seventh Si site, Si(7) is bonded in a distorted q6 geometry to one Re(7), two equivalent Re(1), two equivalent Re(5), one Si(5), one Si(9), and two equivalent Si(14) atoms. In the eighth Si site, Si(8) is bonded in a distorted q6 geometry to one Re(1), two equivalent Re(2), two equivalent Re(7), one Si(14), two equivalent Si(11), and two equivalent Si(9) atoms. In the ninth Si site, Si(9) is bonded in a distorted q6 geometry to one Re(2), two equivalent Re(1), two equivalent Re(5), one Si(7), two equivalent Si(2), and two equivalent Si(8) atoms. In the tenth Si site, Si(10) is bonded in a 10-coordinate geometry to one Re(3), two equivalent Re(4), two equivalent Re(6), one Si(1), two equivalent Si(5), and two equivalent Si(6) atoms. In the eleventh Si site, Si(11) is bonded in a distorted q6 geometry to one Re(7), two equivalent Re(1), two equivalent Re(3), two equivalent Si(3), and two equivalent Si(8) atoms. In the twelfth Si site, Si(12) is bonded in a 4-coordinate geometry to one Re(2), two equivalent Re(4), one Si(1), and two equivalent Si(14) atoms. In the thirteenth Si site, Si(13) is bonded in a distorted q6 geometry to one Re(6), two equivalent Re(3), two equivalent Re(8), one Si(6), two equivalent Si(1), and two equivalent Si(3) atoms. In the fourteenth Si site, Si(14) is bonded in a 10-coordinate geometry to one Re(5), two equivalent Re(2), two equivalent Re(7), one Si(8), two equivalent Si(12), and two equivalent Si(7) atoms.
Re4Si7 crystallizes in the monoclinic Cm space group. There are eight inequivalent Re sites. In the first Re site, Re(1) is bonded in a 9-coordinate geometry to one Si(8), two equivalent Si(11), two equivalent Si(5), two equivalent Si(7), and two equivalent Si(9) atoms. The Re(1)-Si(8) bond length is 2.58 Å. Both Re(1)-Si(11) bond lengths are 2.54 Å. Both Re(1)-Si(5) bond lengths are 2.51 Å. Both Re(1)-Si(7) bond lengths are 2.67 Å. Both Re(1)-Si(9) bond lengths are 2.57 Å. In the second Re site, Re(2) is bonded in a 8-coordinate geometry to one Si(12), one Si(9), two equivalent Si(14), two equivalent Si(2), and two equivalent Si(8) atoms. The Re(2)-Si(12) bond length is 2.42 Å. The Re(2)-Si(9) bond length is 2.52 Å. Both Re(2)-Si(14) bond lengths are 2.54 Å. Both Re(2)-Si(2) bond lengths are 2.52 Å. Both Re(2)-Si(8) bond lengths are 2.51 Å. In the third Re site, Re(3) is bonded in a 8-coordinate geometry to one Si(10), one Si(3), two equivalent Si(11), two equivalent Si(13), and two equivalent Si(6) atoms. The Re(3)-Si(10) bond length is 2.58 Å. The Re(3)-Si(3) bond length is 2.65 Å. Both Re(3)-Si(11) bond lengths are 2.50 Å. Both Re(3)-Si(13) bond lengths are 2.49 Å. Both Re(3)-Si(6) bond lengths are 2.58 Å. In the fourth Re site, Re(4) is bonded in a 9-coordinate geometry to one Si(6), two equivalent Si(1), two equivalent Si(10), two equivalent Si(12), and two equivalent Si(4) atoms. The Re(4)-Si(6) bond length is 2.53 Å. Both Re(4)-Si(1) bond lengths are 2.62 Å. Both Re(4)-Si(10) bond lengths are 2.70 Å. Both Re(4)-Si(12) bond lengths are 2.50 Å. Both Re(4)-Si(4) bond lengths are 2.52 Å. In the fifth Re site, Re(5) is bonded in a 8-coordinate geometry to one Si(14), one Si(2), two equivalent Si(4), two equivalent Si(7), and two equivalent Si(9) atoms. The Re(5)-Si(14) bond length is 2.59 Å. The Re(5)-Si(2) bond length is 2.68 Å. Both Re(5)-Si(4) bond lengths are 2.54 Å. Both Re(5)-Si(7) bond lengths are 2.54 Å. Both Re(5)-Si(9) bond lengths are 2.50 Å. In the sixth Re site, Re(6) is bonded in a 8-coordinate geometry to one Si(13), one Si(5), two equivalent Si(1), two equivalent Si(10), and two equivalent Si(3) atoms. The Re(6)-Si(13) bond length is 2.51 Å. The Re(6)-Si(5) bond length is 2.41 Å. Both Re(6)-Si(1) bond lengths are 2.51 Å. Both Re(6)-Si(10) bond lengths are 2.53 Å. Both Re(6)-Si(3) bond lengths are 2.52 Å. In the seventh Re site, Re(7) is bonded in a 8-coordinate geometry to one Si(11), one Si(7), two equivalent Si(14), two equivalent Si(3), and two equivalent Si(8) atoms. The Re(7)-Si(11) bond length is 2.67 Å. The Re(7)-Si(7) bond length is 2.56 Å. Both Re(7)-Si(14) bond lengths are 2.67 Å. Both Re(7)-Si(3) bond lengths are 2.51 Å. Both Re(7)-Si(8) bond lengths are 2.50 Å. In the eighth Re site, Re(8) is bonded in a 8-coordinate geometry to one Si(1), one Si(4), two equivalent Si(13), two equivalent Si(2), and two equivalent Si(6) atoms. The Re(8)-Si(1) bond length is 2.60 Å. The Re(8)-Si(4) bond length is 2.59 Å. Both Re(8)-Si(13) bond lengths are 2.57 Å. Both Re(8)-Si(2) bond lengths are 2.49 Å. Both Re(8)-Si(6) bond lengths are 2.52 Å. There are fourteen inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Re(8), two equivalent Re(4), two equivalent Re(6), one Si(10), one Si(12), and two equivalent Si(13) atoms. The Si(1)-Si(10) bond length is 2.75 Å. The Si(1)-Si(12) bond length is 2.40 Å. Both Si(1)-Si(13) bond lengths are 2.56 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Re(5), two equivalent Re(2), two equivalent Re(8), two equivalent Si(4), and two equivalent Si(9) atoms. Both Si(2)-Si(4) bond lengths are 2.67 Å. Both Si(2)-Si(9) bond lengths are 2.65 Å. In the third Si site, Si(3) is bonded in a distorted q6 geometry to one Re(3), two equivalent Re(6), two equivalent Re(7), two equivalent Si(11), and two equivalent Si(13) atoms. Both Si(3)-Si(11) bond lengths are 2.65 Å. Both Si(3)-Si(13) bond lengths are 2.68 Å. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to one Re(8), two equivalent Re(4), two equivalent Re(5), two equivalent Si(2), and two equivalent Si(6) atoms. Both Si(4)-Si(6) bond lengths are 2.63 Å. In the fifth Si site, Si(5) is bonded in a 4-coordinate geometry to one Re(6), two equivalent Re(1), one Si(7), and two equivalent Si(10) atoms. The Si(5)-Si(7) bond length is 2.39 Å. Both Si(5)-Si(10) bond lengths are 2.87 Å. In the sixth Si site, Si(6) is bonded in a distorted q6 geometry to one Re(4), two equivalent Re(3), two equivalent Re(8), one Si(13), two equivalent Si(10), and two equivalent Si(4) atoms. The Si(6)-Si(13) bond length is 2.55 Å. Both Si(6)-Si(10) bond lengths are 2.64 Å. In the seventh Si site, Si(7) is bonded in a distorted q6 geometry to one Re(7), two equivalent Re(1), two equivalent Re(5), one Si(5), one Si(9), and two equivalent Si(14) atoms. The Si(7)-Si(9) bond length is 2.61 Å. Both Si(7)-Si(14) bond lengths are 2.55 Å. In the eighth Si site, Si(8) is bonded in a distorted q6 geometry to one Re(1), two equivalent Re(2), two equivalent Re(7), one Si(14), two equivalent Si(11), and two equivalent Si(9) atoms. The Si(8)-Si(14) bond length is 2.62 Å. Both Si(8)-Si(11) bond lengths are 2.63 Å. Both Si(8)-Si(9) bond lengths are 2.65 Å. In the ninth Si site, Si(9) is bonded in a distorted q6 geometry to one Re(2), two equivalent Re(1), two equivalent Re(5), one Si(7), two equivalent Si(2), and two equivalent Si(8) atoms. In the tenth Si site, Si(10) is bonded in a 10-coordinate geometry to one Re(3), two equivalent Re(4), two equivalent Re(6), one Si(1), two equivalent Si(5), and two equivalent Si(6) atoms. In the eleventh Si site, Si(11) is bonded in a distorted q6 geometry to one Re(7), two equivalent Re(1), two equivalent Re(3), two equivalent Si(3), and two equivalent Si(8) atoms. In the twelfth Si site, Si(12) is bonded in a 4-coordinate geometry to one Re(2), two equivalent Re(4), one Si(1), and two equivalent Si(14) atoms. Both Si(12)-Si(14) bond lengths are 2.84 Å. In the thirteenth Si site, Si(13) is bonded in a distorted q6 geometry to one Re(6), two equivalent Re(3), two equivalent Re(8), one Si(6), two equivalent Si(1), and two equivalent Si(3) atoms. In the fourteenth Si site, Si(14) is bonded in a 10-coordinate geometry to one Re(5), two equivalent Re(2), two equivalent Re(7), one Si(8), two equivalent Si(12), and two equivalent Si(7) atoms.