La4Re6O19 crystallizes in the trigonal R3 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), one O(5), one O(7), two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms. In the second La site, La(2) is bonded in a 10-coordinate geometry to one O(1), three equivalent O(4), three equivalent O(5), and three equivalent O(7) atoms. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(3) atoms to form a mixture of edge and corner-sharing ReO6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the second Re site, Re(2) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing ReO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent Re(1) atoms. In the second O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent La(1), one Re(1), and one Re(2) atom. In the fifth O site, O(7) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the sixth O site, O(1) is bonded in a tetrahedral geometry to one La(2) and three equivalent La(1) atoms. In the seventh O site, O(2) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent Re(2) atoms.
La4Re6O19 crystallizes in the trigonal R3 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), one O(5), one O(7), two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms. The La(1)-O(1) bond length is 2.48 Å. The La(1)-O(4) bond length is 2.97 Å. The La(1)-O(5) bond length is 2.59 Å. The La(1)-O(7) bond length is 2.51 Å. There is one shorter (2.59 Å) and one longer (2.95 Å) La(1)-O(2) bond length. There is one shorter (2.59 Å) and one longer (2.97 Å) La(1)-O(3) bond length. Both La(1)-O(6) bond lengths are 2.51 Å. In the second La site, La(2) is bonded in a 10-coordinate geometry to one O(1), three equivalent O(4), three equivalent O(5), and three equivalent O(7) atoms. The La(2)-O(1) bond length is 2.49 Å. All La(2)-O(4) bond lengths are 2.59 Å. All La(2)-O(5) bond lengths are 2.96 Å. All La(2)-O(7) bond lengths are 2.51 Å. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(3) atoms to form a mixture of edge and corner-sharing ReO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Re(1)-O(4) bond length is 1.98 Å. The Re(1)-O(5) bond length is 1.99 Å. The Re(1)-O(6) bond length is 2.02 Å. The Re(1)-O(7) bond length is 2.02 Å. Both Re(1)-O(3) bond lengths are 1.99 Å. In the second Re site, Re(2) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing ReO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Re(2)-O(4) bond length is 1.99 Å. The Re(2)-O(5) bond length is 1.98 Å. The Re(2)-O(6) bond length is 2.02 Å. The Re(2)-O(7) bond length is 2.02 Å. Both Re(2)-O(2) bond lengths are 1.99 Å. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent Re(1) atoms. In the second O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent La(1), one Re(1), and one Re(2) atom. In the fifth O site, O(7) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Re(1), and one Re(2) atom. In the sixth O site, O(1) is bonded in a tetrahedral geometry to one La(2) and three equivalent La(1) atoms. In the seventh O site, O(2) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent Re(2) atoms.