Sm2NiGa9Ge2 crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(3); four Ga(1,1,1); four equivalent Ga(2); two equivalent Ge(1); and two equivalent Ge(2) atoms. In the second Sm site, Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(3); four Ga(1,1,1); four equivalent Ga(2); two equivalent Ge(1); and two equivalent Ge(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a body-centered cubic geometry to eight Ga(1,1,1,1) atoms. In the second Ni site, Ni(1) is bonded in a body-centered cubic geometry to eight Ga(1,1,1,1) atoms. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. In the second Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. In the third Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1); one Ge(1); and one Ge(2) atom. In the fourth Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. In the fifth Ga site, Ga(2) is bonded in a 6-coordinate geometry to two Sm(1,1); one Ga(3); and three equivalent Ga(2) atoms. In the sixth Ga site, Ga(3) is bonded in a 9-coordinate geometry to four Sm(1,1); four equivalent Ga(2); and one Ge(1) atom. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four Sm(1,1); one Ga(3); and four Ga(1,1,1) atoms. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to four Sm(1,1); one Ga(3); and four Ga(1,1,1) atoms. In the third Ge site, Ge(2) is bonded in a 8-coordinate geometry to four Sm(1,1) and four Ga(1,1,1) atoms. In the fourth Ge site, Ge(2) is bonded in a 8-coordinate geometry to four Sm(1,1) and four Ga(1,1,1) atoms.
Sm2NiGa9Ge2 crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(3); four Ga(1,1,1); four equivalent Ga(2); two equivalent Ge(1); and two equivalent Ge(2) atoms. Both Sm(1)-Ga(3) bond lengths are 3.30 Å. All Sm(1)-Ga(1,1,1) bond lengths are 3.29 Å. All Sm(1)-Ga(2) bond lengths are 3.30 Å. Both Sm(1)-Ge(1) bond lengths are 3.18 Å. Both Sm(1)-Ge(2) bond lengths are 3.01 Å. In the second Sm site, Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(3); four Ga(1,1,1); four equivalent Ga(2); two equivalent Ge(1); and two equivalent Ge(2) atoms. Both Sm(1)-Ga(3) bond lengths are 3.30 Å. All Sm(1)-Ga(1,1,1) bond lengths are 3.29 Å. All Sm(1)-Ga(2) bond lengths are 3.30 Å. Both Sm(1)-Ge(1) bond lengths are 3.18 Å. Both Sm(1)-Ge(2) bond lengths are 3.01 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a body-centered cubic geometry to eight Ga(1,1,1,1) atoms. All Ni(1)-Ga(1,1,1,1) bond lengths are 2.48 Å. In the second Ni site, Ni(1) is bonded in a body-centered cubic geometry to eight Ga(1,1,1,1) atoms. All Ni(1)-Ga(1,1,1,1) bond lengths are 2.48 Å. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. There is one shorter (2.62 Å) and two longer (2.78 Å) Ga(1)-Ga(1,1,1) bond lengths. The Ga(1)-Ge(1) bond length is 2.68 Å. The Ga(1)-Ge(2) bond length is 2.88 Å. In the second Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. There is one shorter (2.62 Å) and one longer (2.78 Å) Ga(1)-Ga(1,1) bond length. The Ga(1)-Ge(1) bond length is 2.68 Å. The Ga(1)-Ge(2) bond length is 2.88 Å. In the third Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1); one Ge(1); and one Ge(2) atom. There is one shorter (2.62 Å) and one longer (2.78 Å) Ga(1)-Ga(1) bond length. The Ga(1)-Ge(1) bond length is 2.68 Å. The Ga(1)-Ge(2) bond length is 2.88 Å. In the fourth Ga site, Ga(1) is bonded in a 9-coordinate geometry to two Sm(1,1); two Ni(1,1); three Ga(1,1,1); one Ge(1); and one Ge(2) atom. Both Ga(1)-Sm(1,1) bond lengths are 3.29 Å. Both Ga(1)-Ga(1,1) bond lengths are 2.78 Å. The Ga(1)-Ge(1) bond length is 2.68 Å. The Ga(1)-Ge(2) bond length is 2.88 Å. In the fifth Ga site, Ga(2) is bonded in a 6-coordinate geometry to two Sm(1,1); one Ga(3); and three equivalent Ga(2) atoms. The Ga(2)-Ga(3) bond length is 2.61 Å. There is one shorter (2.56 Å) and two longer (2.64 Å) Ga(2)-Ga(2) bond lengths. In the sixth Ga site, Ga(3) is bonded in a 9-coordinate geometry to four Sm(1,1); four equivalent Ga(2); and one Ge(1) atom. The Ga(3)-Ge(1) bond length is 2.48 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four Sm(1,1); one Ga(3); and four Ga(1,1,1) atoms. All Ge(1)-Sm(1,1) bond lengths are 3.18 Å. All Ge(1)-Ga(1,1) bond lengths are 2.68 Å. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to four Sm(1,1); one Ga(3); and four Ga(1,1,1) atoms. The Ge(1)-Ga(3) bond length is 2.48 Å. In the third Ge site, Ge(2) is bonded in a 8-coordinate geometry to four Sm(1,1) and four Ga(1,1,1) atoms. In the fourth Ge site, Ge(2) is bonded in a 8-coordinate geometry to four Sm(1,1) and four Ga(1,1,1) atoms. All Ge(2)-Sm(1,1) bond lengths are 3.01 Å. All Ge(2)-Ga(1,1) bond lengths are 2.88 Å.