PrNiSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. In the second Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. In the third Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. In the second Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. In the third Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. In the fourth Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms.
PrNiSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. There are two shorter (3.04 Å) and four longer (3.18 Å) Pr(1)-Ni(1,1) bond lengths. All Pr(1)-Si(1,1) bond lengths are 3.13 Å. In the second Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. There are two shorter (3.04 Å) and four longer (3.18 Å) Pr(1)-Ni(1,1) bond lengths. All Pr(1)-Si(1,1) bond lengths are 3.13 Å. In the third Pr site, Pr(1) is bonded to six Ni(1,1) and six Si(1,1) atoms to form a mixture of edge and face-sharing PrSi6Ni6 cuboctahedra. There are two shorter (3.04 Å) and four longer (3.18 Å) Pr(1)-Ni(1,1) bond lengths. All Pr(1)-Si(1,1) bond lengths are 3.13 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. All Ni(1)-Si(1,1) bond lengths are 2.35 Å. In the second Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. All Ni(1)-Si(1,1) bond lengths are 2.35 Å. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Si(1,1) atoms. Both Ni(1)-Pr(1) bond lengths are 3.04 Å. All Ni(1)-Si(1,1) bond lengths are 2.35 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. In the third Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. Both Si(1)-Pr(1) bond lengths are 3.13 Å. Both Si(1)-Ni(1) bond lengths are 2.35 Å. In the fourth Si site, Si(1) is bonded in a 9-coordinate geometry to six Pr(1,1) and three Ni(1,1) atoms. All Si(1)-Pr(1) bond lengths are 3.13 Å. The Si(1)-Ni(1) bond length is 2.35 Å.