HfRuAs crystallizes in the orthorhombic Ima2 space group. There are three inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 5-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one As(1), and four equivalent As(2) atoms. In the second Hf site, Hf(2) is bonded in a 9-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one As(1), and four equivalent As(2) atoms. In the third Hf site, Hf(3) is bonded in a 11-coordinate geometry to two equivalent Ru(1), four equivalent Ru(2), one As(1), and four equivalent As(2) atoms. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 12-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), two equivalent Ru(2), two equivalent As(1), and two equivalent As(2) atoms. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to one Hf(1), one Hf(2), two equivalent Hf(3), one Ru(1), two equivalent As(1), and two equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to one Hf(1), one Hf(2), one Hf(3), two equivalent Ru(1), and four equivalent Ru(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), one Ru(1), and two equivalent Ru(2) atoms.
HfRuAs crystallizes in the orthorhombic Ima2 space group. There are three inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 5-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one As(1), and four equivalent As(2) atoms. Both Hf(1)-Ru(1) bond lengths are 3.15 Å. Both Hf(1)-Ru(2) bond lengths are 3.00 Å. The Hf(1)-As(1) bond length is 2.66 Å. There are two shorter (2.77 Å) and two longer (2.79 Å) Hf(1)-As(2) bond lengths. In the second Hf site, Hf(2) is bonded in a 9-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), one As(1), and four equivalent As(2) atoms. Both Hf(2)-Ru(1) bond lengths are 2.95 Å. Both Hf(2)-Ru(2) bond lengths are 2.98 Å. The Hf(2)-As(1) bond length is 2.81 Å. There are two shorter (2.74 Å) and two longer (2.77 Å) Hf(2)-As(2) bond lengths. In the third Hf site, Hf(3) is bonded in a 11-coordinate geometry to two equivalent Ru(1), four equivalent Ru(2), one As(1), and four equivalent As(2) atoms. Both Hf(3)-Ru(1) bond lengths are 2.99 Å. There are two shorter (2.90 Å) and two longer (2.92 Å) Hf(3)-Ru(2) bond lengths. The Hf(3)-As(1) bond length is 2.93 Å. There are two shorter (2.76 Å) and two longer (2.79 Å) Hf(3)-As(2) bond lengths. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 12-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), two equivalent Ru(2), two equivalent As(1), and two equivalent As(2) atoms. Both Ru(1)-Ru(2) bond lengths are 2.85 Å. Both Ru(1)-As(1) bond lengths are 2.55 Å. Both Ru(1)-As(2) bond lengths are 2.57 Å. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to one Hf(1), one Hf(2), two equivalent Hf(3), one Ru(1), two equivalent As(1), and two equivalent As(2) atoms. There is one shorter (2.53 Å) and one longer (2.55 Å) Ru(2)-As(1) bond length. Both Ru(2)-As(2) bond lengths are 2.58 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to one Hf(1), one Hf(2), one Hf(3), two equivalent Ru(1), and four equivalent Ru(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Hf(3), one Ru(1), and two equivalent Ru(2) atoms.