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PrI4(I)2 crystallizes in the orthorhombic Cmmm space group. The structure is zero-dimensional and consists of four hydriodic acid molecules and two PrI4 clusters. In each PrI4 cluster, Pr is bonded in a square co-planar geometry to four equivalent I atoms. All Pr–I bond lengths are 3.02 Å. I is bonded in a single-bond geometry to one Pr atom.
Cs2NaPrI6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent I1- atoms to form CsI12 cuboctahedra that share corners with twelve equivalent CsI12 cuboctahedra, faces with six equivalent CsI12 cuboctahedra, faces with four equivalent NaI6 octahedra, and faces with four equivalent PrI6 octahedra. All Cs–I bond lengths are 4.45 Å. Na1+ is bonded to six equivalent I1- atoms to form NaI6 octahedra that share corners with six equivalent PrI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Na–I bond lengths are 3.16 Å. Pr3+ is bonded to six equivalent I1- atoms to form PrI6 octahedra that share corners with six equivalent NaI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–I bond lengths are 3.13 Å. I1- is bonded in a distorted linear geometry to four equivalent Cs1+, one Na1+, and one Pr3+ atom.
Cs2PrAgI6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent I1- atoms to form CsI12 cuboctahedra that share corners with twelve equivalent CsI12 cuboctahedra, faces with six equivalent CsI12 cuboctahedra, faces with four equivalent PrI6 octahedra, and faces with four equivalent AgI6 octahedra. All Cs–I bond lengths are 4.38 Å. Pr3+ is bonded to six equivalent I1- atoms to form PrI6 octahedra that share corners with six equivalent AgI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–I bond lengths are 3.13 Å. Ag1+ is bonded to six equivalent I1- atoms to form AgI6 octahedra that share corners with six equivalent PrI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–I bond lengths are 3.06 Å. I1- is bonded in a distorted linear geometry to four equivalent Cs1+, one Pr3+, and one Ag1+ atom.
Cs2LiPrI6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent I1- atoms to form CsI12 cuboctahedra that share corners with twelve equivalent CsI12 cuboctahedra, faces with six equivalent CsI12 cuboctahedra, faces with four equivalent LiI6 octahedra, and faces with four equivalent PrI6 octahedra. All Cs–I bond lengths are 4.34 Å. Li1+ is bonded to six equivalent I1- atoms to form LiI6 octahedra that share corners with six equivalent PrI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Li–I bond lengths are 3.01 Å. Pr3+ is bonded to six equivalent I1- atoms to form PrI6 octahedra that share corners with six equivalent LiI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–I bond lengths are 3.13 Å. I1- is bonded in a distorted linear geometry to four equivalent Cs1+, one Li1+, and one Pr3+ atom.
Cs2KPrI6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent I1- atoms to form distorted CsI12 cuboctahedra that share corners with twelve equivalent CsI12 cuboctahedra, faces with six equivalent CsI12 cuboctahedra, faces with four equivalent KI6 octahedra, and faces with four equivalent PrI6 octahedra. All Cs–I bond lengths are 4.62 Å. K1+ is bonded to six equivalent I1- atoms to form KI6 octahedra that share corners with six equivalent PrI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All K–I bond lengths are 3.40 Å. Pr3+ is bonded to six equivalent I1- atoms to form PrI6 octahedra that share corners with six equivalent KI6 octahedra and faces with eight equivalent CsI12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–I bond lengths are 3.13 Å. I1- is bonded in a linear geometry to four equivalent Cs1+, one K1+, and one Pr3+ atom.
Pr7CoI12 is trigonal omega-derived structured and crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are two inequivalent Pr sites. In the first Pr site, Pr is bonded to one Co and five I atoms to form a mixture of distorted edge and corner-sharing PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. The Pr–Co bond length is 2.78 Å. There are a spread of Pr–I bond distances ranging from 3.21–3.52 Å. In the second Pr site, Pr is bonded to six equivalent I atoms to form edge-sharing PrI6 octahedra. All Pr–I bond lengths are 3.17 Å. Co is bonded in an octahedral geometry to six equivalent Pr atoms. There are two inequivalent I sites. In the first I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the second I site, I is bonded in a distorted T-shaped geometry to three equivalent Pr atoms.
PrI2 is trigonal omega-like structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Pr is bonded to six I atoms to form edge-sharing PrI6 octahedra. There are three shorter (3.18 Å) and three longer (3.32 Å) Pr–I bond lengths. There are two inequivalent I sites. In the first I site, I is bonded in a distorted T-shaped geometry to three equivalent Pr atoms. In the second I site, I is bonded in a 3-coordinate geometry to three equivalent Pr atoms.
Pr7FeI12 is trigonal omega-derived structured and crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are two inequivalent Pr sites. In the first Pr site, Pr is bonded to one Fe and five I atoms to form a mixture of distorted edge and corner-sharing PrFeI5 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. The Pr–Fe bond length is 2.77 Å. There are a spread of Pr–I bond distances ranging from 3.21–3.51 Å. In the second Pr site, Pr is bonded to six equivalent I atoms to form edge-sharing PrI6 octahedra. All Pr–I bond lengths are 3.18 Å. Fe is bonded in an octahedral geometry to six equivalent Pr atoms. There are two inequivalent I sites. In the first I site, I is bonded in a distorted T-shaped geometry to three equivalent Pr atoms. In the second I site, I is bonded in a distorted T-shaped geometry to three Pr atoms.
PrI3 crystallizes in the hexagonal P6_3/mmc space group. The structure is one-dimensional and consists of two PrI3 ribbons oriented in the (0, 0, 1) direction. Pr3+ is bonded to six equivalent I1- atoms to form distorted face-sharing PrI6 pentagonal pyramids. All Pr–I bond lengths are 3.16 Å. I1- is bonded in an L-shaped geometry to two equivalent Pr3+ atoms.
Ca2Pr19(CoI12)3 is trigonal omega-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Ca is bonded to six I atoms to form CaI6 octahedra that share edges with six PrCoI5 octahedra. There are two shorter (3.15 Å) and four longer (3.16 Å) Ca–I bond lengths. There are ten inequivalent Pr sites. In the first Pr site, Pr is bonded to one Co and five I atoms to form PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. The Pr–Co bond length is 2.82 Å. There are a spread of Pr–I bond distances ranging from 3.20–3.49 Å. In the second Pr site, Pr is bonded to one Co and five I atoms to form PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–7°. The Pr–Co bond length is 2.80 Å. There are a spread of Pr–I bond distances ranging from 3.21–3.51 Å. In the third Pr site, Pr is bonded to one Co and five I atoms to form a mixture of distorted edge and corner-sharing PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–8°. The Pr–Co bond length is 2.79 Å. There are a spread of Pr–I bond distances ranging from 3.20–3.52 Å. In the fourth Pr site, Pr is bonded to one Co and five I atoms to form PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. The Pr–Co bond length is 2.82 Å. There are a spread of Pr–I bond distances ranging from 3.19–3.48 Å. In the fifth Pr site, Pr is bonded to one Co and five I atoms to form PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–8°. The Pr–Co bond length is 2.81 Å. There are a spread of Pr–I bond distances ranging from 3.21–3.50 Å. In the sixth Pr site, Pr is bonded to one Co and five I atoms to form a mixture of edge and corner-sharing PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–8°. The Pr–Co bond length is 2.80 Å. There are a spread of Pr–I bond distances ranging from 3.19–3.51 Å. In the seventh Pr site, Pr is bonded to one Co and five I atoms to form distorted PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. The Pr–Co bond length is 2.75 Å. There are a spread of Pr–I bond distances ranging from 3.21–3.53 Å. In the eighth Pr site, Pr is bonded to one Co and five I atoms to form distorted PrCoI5 octahedra that share corners with three PrCoI5 octahedra, an edgeedge with one CaI6 octahedra, and edges with five PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–8°. The Pr–Co bond length is 2.77 Å. There are a spread of Pr–I bond distances ranging from 3.22–3.51 Å. In the ninth Pr site, Pr is bonded to one Co and five I atoms to form a mixture of distorted edge and corner-sharing PrCoI5 octahedra. The corner-sharing octahedra tilt angles range from 1–8°. The Pr–Co bond length is 2.76 Å. There are a spread of Pr–I bond distances ranging from 3.20–3.51 Å. In the tenth Pr site, Pr is bonded to six I atoms to form edge-sharing PrI6 octahedra. All Pr–I bond lengths are 3.17 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded in an octahedral geometry to six Pr atoms. In the second Co site, Co is bonded in an octahedral geometry to six Pr atoms. There are eighteen inequivalent I sites. In the first I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the second I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the third I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the fourth I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the fifth I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the sixth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the seventh I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the eighth I site, I is bonded in a distorted T-shaped geometry to one Ca and two Pr atoms. In the ninth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the tenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the eleventh I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the twelfth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the thirteenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the fourteenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the fifteenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the sixteenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the seventeenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms. In the eighteenth I site, I is bonded in a distorted T-shaped geometry to three Pr atoms.