(Na)2Na3Si34 crystallizes in the trigonal R-3m space group. The structure consists of six 7440-23-5 atoms inside a Na3Si34 framework. In the Na3Si34 framework, Na(2) is bonded in a 20-coordinate geometry to two equivalent Si(1), two equivalent Si(3), four equivalent Si(2), four equivalent Si(4), four equivalent Si(5), and four equivalent Si(6) atoms. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Na(2), one Si(3), and three equivalent Si(4) atoms. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(3), one Si(6), and two equivalent Si(5) atoms. In the third Si site, Si(3) is bonded in a 7-coordinate geometry to three equivalent Na(2), one Si(1), and three equivalent Si(2) atoms. In the fourth Si site, Si(4) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(1), one Si(6), and two equivalent Si(5) atoms. In the fifth Si site, Si(5) is bonded in a 5-coordinate geometry to one Na(2), one Si(2), one Si(4), and two equivalent Si(5) atoms. In the sixth Si site, Si(6) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(2), one Si(4), and two equivalent Si(6) atoms.
(Na)2Na3Si34 crystallizes in the trigonal R-3m space group. The structure consists of six 7440-23-5 atoms inside a Na3Si34 framework. In the Na3Si34 framework, Na(2) is bonded in a 20-coordinate geometry to two equivalent Si(1), two equivalent Si(3), four equivalent Si(2), four equivalent Si(4), four equivalent Si(5), and four equivalent Si(6) atoms. Both Na(2)-Si(1) bond lengths are 3.27 Å. Both Na(2)-Si(3) bond lengths are 3.19 Å. All Na(2)-Si(2) bond lengths are 3.27 Å. All Na(2)-Si(4) bond lengths are 3.37 Å. All Na(2)-Si(5) bond lengths are 3.37 Å. All Na(2)-Si(6) bond lengths are 3.37 Å. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Na(2), one Si(3), and three equivalent Si(4) atoms. The Si(1)-Si(3) bond length is 2.36 Å. All Si(1)-Si(4) bond lengths are 2.37 Å. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(3), one Si(6), and two equivalent Si(5) atoms. The Si(2)-Si(3) bond length is 2.36 Å. The Si(2)-Si(6) bond length is 2.36 Å. Both Si(2)-Si(5) bond lengths are 2.37 Å. In the third Si site, Si(3) is bonded in a 7-coordinate geometry to three equivalent Na(2), one Si(1), and three equivalent Si(2) atoms. In the fourth Si site, Si(4) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(1), one Si(6), and two equivalent Si(5) atoms. The Si(4)-Si(6) bond length is 2.40 Å. Both Si(4)-Si(5) bond lengths are 2.35 Å. In the fifth Si site, Si(5) is bonded in a 5-coordinate geometry to one Na(2), one Si(2), one Si(4), and two equivalent Si(5) atoms. There is one shorter (2.35 Å) and one longer (2.39 Å) Si(5)-Si(5) bond length. In the sixth Si site, Si(6) is bonded in a 6-coordinate geometry to two equivalent Na(2), one Si(2), one Si(4), and two equivalent Si(6) atoms. Both Si(6)-Si(6) bond lengths are 2.36 Å.