Cs2LaBr5 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. La(1) is bonded to one Br(1), one Br(3), one Br(4), and four equivalent Br(2) atoms to form distorted edge-sharing LaBr7 pentagonal bipyramids. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one La(1) atom. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent La(1) atoms. In the third Br site, Br(3) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, face, and corner-sharing BrCs4La trigonal bipyramids. In the fourth Br site, Br(4) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, face, and corner-sharing BrCs4La trigonal bipyramids.
Cs2LaBr5 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. There is one shorter (3.69 Å) and one longer (3.77 Å) Cs(1)-Br(1) bond length. There is one shorter (3.86 Å) and one longer (3.88 Å) Cs(1)-Br(2) bond length. There is one shorter (3.59 Å) and one longer (3.65 Å) Cs(1)-Br(3) bond length. There is one shorter (3.59 Å) and one longer (3.61 Å) Cs(1)-Br(4) bond length. La(1) is bonded to one Br(1), one Br(3), one Br(4), and four equivalent Br(2) atoms to form distorted edge-sharing LaBr7 pentagonal bipyramids. The La(1)-Br(1) bond length is 2.96 Å. The La(1)-Br(3) bond length is 2.99 Å. The La(1)-Br(4) bond length is 2.98 Å. There are two shorter (3.08 Å) and two longer (3.10 Å) La(1)-Br(2) bond lengths. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one La(1) atom. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent La(1) atoms. In the third Br site, Br(3) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, face, and corner-sharing BrCs4La trigonal bipyramids. In the fourth Br site, Br(4) is bonded to four equivalent Cs(1) and one La(1) atom to form a mixture of distorted edge, face, and corner-sharing BrCs4La trigonal bipyramids.