EuI3CH3NH3 crystallizes in the monoclinic Cc space group. The structure consists of eight methylammonium molecules inside a EuI3 framework. In the EuI3 framework, there are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one I(1), one I(2), one I(3), one I(4), and two equivalent I(5) atoms to form corner-sharing EuI6 octahedra. The corner-sharing octahedral tilt angles range from 7-31°. In the second Eu site, Eu(2) is bonded to one I(1), one I(2), one I(3), one I(4), and two equivalent I(6) atoms to form corner-sharing EuI6 octahedra. The corner-sharing octahedral tilt angles range from 5-31°. There are six inequivalent I sites. In the first I site, I(2) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the second I site, I(1) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the third I site, I(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the fourth I site, I(4) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the fifth I site, I(5) is bonded in a linear geometry to two equivalent Eu(1) atoms. In the sixth I site, I(6) is bonded in a linear geometry to two equivalent Eu(2) atoms.
EuI3CH3NH3 crystallizes in the monoclinic Cc space group. The structure consists of eight methylammonium molecules inside a EuI3 framework. In the EuI3 framework, there are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one I(1), one I(2), one I(3), one I(4), and two equivalent I(5) atoms to form corner-sharing EuI6 octahedra. The corner-sharing octahedral tilt angles range from 7-31°. The Eu(1)-I(1) bond length is 3.31 Å. The Eu(1)-I(2) bond length is 3.22 Å. The Eu(1)-I(3) bond length is 3.27 Å. The Eu(1)-I(4) bond length is 3.27 Å. There is one shorter (3.31 Å) and one longer (3.35 Å) Eu(1)-I(5) bond length. In the second Eu site, Eu(2) is bonded to one I(1), one I(2), one I(3), one I(4), and two equivalent I(6) atoms to form corner-sharing EuI6 octahedra. The corner-sharing octahedral tilt angles range from 5-31°. The Eu(2)-I(1) bond length is 3.30 Å. The Eu(2)-I(2) bond length is 3.23 Å. The Eu(2)-I(3) bond length is 3.27 Å. The Eu(2)-I(4) bond length is 3.26 Å. There is one shorter (3.30 Å) and one longer (3.35 Å) Eu(2)-I(6) bond length. There are six inequivalent I sites. In the first I site, I(2) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the second I site, I(1) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the third I site, I(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the fourth I site, I(4) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom. In the fifth I site, I(5) is bonded in a linear geometry to two equivalent Eu(1) atoms. In the sixth I site, I(6) is bonded in a linear geometry to two equivalent Eu(2) atoms.