Hf3AlGe5 is Zirconium Disilicide-derived structured and crystallizes in the orthorhombic Amm2 space group. There are six inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(4), two equivalent Ge(6), and four equivalent Ge(8) atoms. In the second Hf site, Hf(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Ge(2), two equivalent Ge(7), and four equivalent Ge(9) atoms. In the third Hf site, Hf(3) is bonded in a 10-coordinate geometry to two equivalent Al(2), two equivalent Ge(3), two equivalent Ge(5), and four equivalent Ge(10) atoms. In the fourth Hf site, Hf(4) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(10), two equivalent Ge(4), and four equivalent Ge(5) atoms. In the fifth Hf site, Hf(5) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Ge(2), two equivalent Ge(8), and four equivalent Ge(6) atoms. In the sixth Hf site, Hf(6) is bonded in a 10-coordinate geometry to two equivalent Al(2), two equivalent Ge(3), two equivalent Ge(9), and four equivalent Ge(7) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to two equivalent Hf(2), two equivalent Hf(5), and four equivalent Ge(2) atoms. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to two equivalent Hf(3), two equivalent Hf(6), and four equivalent Ge(3) atoms. There are ten inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(4), and four equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded to two equivalent Hf(2), two equivalent Hf(5), and four equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing GeHf4Al4 hexagonal bipyramids. In the third Ge site, Ge(3) is bonded to two equivalent Hf(3), two equivalent Hf(6), and four equivalent Al(2) atoms to form a mixture of distorted corner and face-sharing GeHf4Al4 hexagonal bipyramids. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(4), and four equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 8-coordinate geometry to two equivalent Hf(3), four equivalent Hf(4), and two equivalent Ge(10) atoms. In the sixth Ge site, Ge(6) is bonded in a 4-coordinate geometry to two equivalent Hf(1), four equivalent Hf(5), and two equivalent Ge(8) atoms. In the seventh Ge site, Ge(7) is bonded in a 8-coordinate geometry to two equivalent Hf(2), four equivalent Hf(6), and two equivalent Ge(9) atoms. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Hf(5), four equivalent Hf(1), and two equivalent Ge(6) atoms. In the ninth Ge site, Ge(9) is bonded in a 8-coordinate geometry to two equivalent Hf(6), four equivalent Hf(2), and two equivalent Ge(7) atoms. In the tenth Ge site, Ge(10) is bonded in a 8-coordinate geometry to two equivalent Hf(4), four equivalent Hf(3), and two equivalent Ge(5) atoms.
Hf3AlGe5 is Zirconium Disilicide-derived structured and crystallizes in the orthorhombic Amm2 space group. There are six inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(4), two equivalent Ge(6), and four equivalent Ge(8) atoms. Both Hf(1)-Ge(1) bond lengths are 2.87 Å. Both Hf(1)-Ge(4) bond lengths are 2.85 Å. Both Hf(1)-Ge(6) bond lengths are 3.20 Å. All Hf(1)-Ge(8) bond lengths are 2.78 Å. In the second Hf site, Hf(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Ge(2), two equivalent Ge(7), and four equivalent Ge(9) atoms. Both Hf(2)-Al(1) bond lengths are 2.92 Å. Both Hf(2)-Ge(2) bond lengths are 2.94 Å. Both Hf(2)-Ge(7) bond lengths are 3.12 Å. All Hf(2)-Ge(9) bond lengths are 2.75 Å. In the third Hf site, Hf(3) is bonded in a 10-coordinate geometry to two equivalent Al(2), two equivalent Ge(3), two equivalent Ge(5), and four equivalent Ge(10) atoms. Both Hf(3)-Al(2) bond lengths are 2.93 Å. Both Hf(3)-Ge(3) bond lengths are 2.95 Å. Both Hf(3)-Ge(5) bond lengths are 3.06 Å. All Hf(3)-Ge(10) bond lengths are 2.74 Å. In the fourth Hf site, Hf(4) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(10), two equivalent Ge(4), and four equivalent Ge(5) atoms. Both Hf(4)-Ge(1) bond lengths are 2.85 Å. Both Hf(4)-Ge(10) bond lengths are 3.20 Å. Both Hf(4)-Ge(4) bond lengths are 2.87 Å. All Hf(4)-Ge(5) bond lengths are 2.78 Å. In the fifth Hf site, Hf(5) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Ge(2), two equivalent Ge(8), and four equivalent Ge(6) atoms. Both Hf(5)-Al(1) bond lengths are 2.95 Å. Both Hf(5)-Ge(2) bond lengths are 2.93 Å. Both Hf(5)-Ge(8) bond lengths are 3.05 Å. All Hf(5)-Ge(6) bond lengths are 2.74 Å. In the sixth Hf site, Hf(6) is bonded in a 10-coordinate geometry to two equivalent Al(2), two equivalent Ge(3), two equivalent Ge(9), and four equivalent Ge(7) atoms. Both Hf(6)-Al(2) bond lengths are 2.94 Å. Both Hf(6)-Ge(3) bond lengths are 2.92 Å. Both Hf(6)-Ge(9) bond lengths are 3.11 Å. All Hf(6)-Ge(7) bond lengths are 2.75 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to two equivalent Hf(2), two equivalent Hf(5), and four equivalent Ge(2) atoms. All Al(1)-Ge(2) bond lengths are 2.69 Å. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to two equivalent Hf(3), two equivalent Hf(6), and four equivalent Ge(3) atoms. All Al(2)-Ge(3) bond lengths are 2.69 Å. There are ten inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(4), and four equivalent Ge(4) atoms. All Ge(1)-Ge(4) bond lengths are 2.69 Å. In the second Ge site, Ge(2) is bonded to two equivalent Hf(2), two equivalent Hf(5), and four equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing GeHf4Al4 hexagonal bipyramids. In the third Ge site, Ge(3) is bonded to two equivalent Hf(3), two equivalent Hf(6), and four equivalent Al(2) atoms to form a mixture of distorted corner and face-sharing GeHf4Al4 hexagonal bipyramids. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Hf(1), two equivalent Hf(4), and four equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 8-coordinate geometry to two equivalent Hf(3), four equivalent Hf(4), and two equivalent Ge(10) atoms. Both Ge(5)-Ge(10) bond lengths are 2.67 Å. In the sixth Ge site, Ge(6) is bonded in a 4-coordinate geometry to two equivalent Hf(1), four equivalent Hf(5), and two equivalent Ge(8) atoms. Both Ge(6)-Ge(8) bond lengths are 2.67 Å. In the seventh Ge site, Ge(7) is bonded in a 8-coordinate geometry to two equivalent Hf(2), four equivalent Hf(6), and two equivalent Ge(9) atoms. Both Ge(7)-Ge(9) bond lengths are 2.70 Å. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Hf(5), four equivalent Hf(1), and two equivalent Ge(6) atoms. In the ninth Ge site, Ge(9) is bonded in a 8-coordinate geometry to two equivalent Hf(6), four equivalent Hf(2), and two equivalent Ge(7) atoms. In the tenth Ge site, Ge(10) is bonded in a 8-coordinate geometry to two equivalent Hf(4), four equivalent Hf(3), and two equivalent Ge(5) atoms.