Pr2AlSi is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to three equivalent Al(1) and four equivalent Si(1) atoms. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to four equivalent Al(1) and three equivalent Si(1) atoms. Al(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), four equivalent Pr(2), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to three equivalent Pr(2), four equivalent Pr(1), and two equivalent Al(1) atoms.
Pr2AlSi is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to three equivalent Al(1) and four equivalent Si(1) atoms. There are two shorter (3.27 Å) and one longer (3.34 Å) Pr(1)-Al(1) bond length. All Pr(1)-Si(1) bond lengths are 3.17 Å. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to four equivalent Al(1) and three equivalent Si(1) atoms. All Pr(2)-Al(1) bond lengths are 3.19 Å. There is one shorter (3.28 Å) and two longer (3.31 Å) Pr(2)-Si(1) bond lengths. Al(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), four equivalent Pr(2), and two equivalent Si(1) atoms. Both Al(1)-Si(1) bond lengths are 2.57 Å. Si(1) is bonded in a 9-coordinate geometry to three equivalent Pr(2), four equivalent Pr(1), and two equivalent Al(1) atoms.