Na2TmMoPO8 is Esseneite-derived structured and crystallizes in the orthorhombic Ibca space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms. Tm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Mo(1) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Tm(1), and one P(1) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Tm(1), and one P(1) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one Na(1), one Tm(1), and one Mo(1) atom.
Na2TmMoPO8 is Esseneite-derived structured and crystallizes in the orthorhombic Ibca space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms. The Na(1)-O(2) bond length is 2.86 Å. The Na(1)-O(3) bond length is 2.93 Å. There is one shorter (2.39 Å) and one longer (2.46 Å) Na(1)-O(1) bond length. There is one shorter (2.29 Å) and one longer (2.78 Å) Na(1)-O(4) bond length. Tm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Both Tm(1)-O(1) bond lengths are 2.41 Å. Both Tm(1)-O(3) bond lengths are 2.26 Å. There are two shorter (2.26 Å) and two longer (2.42 Å) Tm(1)-O(2) bond lengths. Mo(1) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. Both Mo(1)-O(3) bond lengths are 1.82 Å. Both Mo(1)-O(4) bond lengths are 1.78 Å. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both P(1)-O(1) bond lengths are 1.55 Å. Both P(1)-O(2) bond lengths are 1.56 Å. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Tm(1), and one P(1) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Tm(1), and one P(1) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one Na(1), one Tm(1), and one Mo(1) atom.