NaGe crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one Ge(2), one Ge(3), two equivalent Ge(1), and two equivalent Ge(4) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one Ge(4), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one Ge(4), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(4), and three equivalent Ge(1) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Na(1), three equivalent Na(4), one Ge(2), one Ge(3), and one Ge(4) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Na(1), one Na(4), two equivalent Na(2), two equivalent Na(3), one Ge(1), one Ge(3), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Na(1), two equivalent Na(2), two equivalent Na(3), one Ge(1), one Ge(2), and one Ge(4) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(4), one Ge(1), one Ge(2), and one Ge(3) atom.
NaGe crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one Ge(2), one Ge(3), two equivalent Ge(1), and two equivalent Ge(4) atoms. The Na(1)-Ge(2) bond length is 3.48 Å. The Na(1)-Ge(3) bond length is 2.93 Å. There is one shorter (3.08 Å) and one longer (3.14 Å) Na(1)-Ge(1) bond length. There is one shorter (3.25 Å) and one longer (3.51 Å) Na(1)-Ge(4) bond length. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one Ge(4), two equivalent Ge(2), and two equivalent Ge(3) atoms. The Na(2)-Ge(4) bond length is 2.93 Å. There is one shorter (2.98 Å) and one longer (3.00 Å) Na(2)-Ge(2) bond length. Both Na(2)-Ge(3) bond lengths are 3.32 Å. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one Ge(4), two equivalent Ge(2), and two equivalent Ge(3) atoms. The Na(3)-Ge(4) bond length is 3.12 Å. There is one shorter (3.00 Å) and one longer (3.02 Å) Na(3)-Ge(2) bond length. There is one shorter (3.01 Å) and one longer (3.08 Å) Na(3)-Ge(3) bond length. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(4), and three equivalent Ge(1) atoms. The Na(4)-Ge(2) bond length is 3.05 Å. There is one shorter (3.13 Å) and one longer (3.23 Å) Na(4)-Ge(4) bond length. There are a spread of Na(4)-Ge(1) bond distances ranging from 2.98-3.24 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Na(1), three equivalent Na(4), one Ge(2), one Ge(3), and one Ge(4) atom. The Ge(1)-Ge(2) bond length is 2.53 Å. The Ge(1)-Ge(3) bond length is 2.56 Å. The Ge(1)-Ge(4) bond length is 2.54 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Na(1), one Na(4), two equivalent Na(2), two equivalent Na(3), one Ge(1), one Ge(3), and one Ge(4) atom. The Ge(2)-Ge(3) bond length is 2.55 Å. The Ge(2)-Ge(4) bond length is 2.59 Å. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Na(1), two equivalent Na(2), two equivalent Na(3), one Ge(1), one Ge(2), and one Ge(4) atom. The Ge(3)-Ge(4) bond length is 2.58 Å. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), two equivalent Na(4), one Ge(1), one Ge(2), and one Ge(3) atom.