K3MoReO8 crystallizes in the trigonal R3m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(2), three equivalent O(4), and six equivalent O(3) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), three equivalent O(3), and six equivalent O(4) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. Mo(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(3) atoms. Re(1) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one K(2) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one K(1) and one Re(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one K(2), one K(3), two equivalent K(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(3), two equivalent K(2), and one Re(1) atom.
K3MoReO8 crystallizes in the trigonal R3m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(2), three equivalent O(4), and six equivalent O(3) atoms. The K(1)-O(2) bond length is 2.62 Å. All K(1)-O(4) bond lengths are 2.82 Å. All K(1)-O(3) bond lengths are 3.10 Å. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), three equivalent O(3), and six equivalent O(4) atoms. The K(2)-O(1) bond length is 2.70 Å. All K(2)-O(3) bond lengths are 2.70 Å. All K(2)-O(4) bond lengths are 3.14 Å. In the third K site, K(3) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. All K(3)-O(3) bond lengths are 2.69 Å. All K(3)-O(4) bond lengths are 2.88 Å. Mo(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(3) atoms. The Mo(1)-O(1) bond length is 1.77 Å. All Mo(1)-O(3) bond lengths are 1.77 Å. Re(1) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(4) atoms. The Re(1)-O(2) bond length is 1.74 Å. All Re(1)-O(4) bond lengths are 1.74 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one K(2) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one K(1) and one Re(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one K(2), one K(3), two equivalent K(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one K(3), two equivalent K(2), and one Re(1) atom.