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Pr(OH)3 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. Pr3+ is bonded in a 9-coordinate geometry to nine equivalent O2- atoms. There are three shorter (2.55 Å) and six longer (2.57 Å) Pr–O bond lengths. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. O2- is bonded in a single-bond geometry to three equivalent Pr3+ and one H1+ atom.
Pr(OH)3 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are two inequivalent Pr3+ sites. In the first Pr3+ site, Pr3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pr–O bond distances ranging from 2.54–2.62 Å. In the second Pr3+ site, Pr3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pr–O bond distances ranging from 2.53–2.66 Å. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to three Pr3+ and one H1+ atom.
Pr(OH)3 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Pr3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pr–O bond distances ranging from 2.54–2.59 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to three equivalent Pr3+ and one H1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three equivalent Pr3+ and one H1+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to three equivalent Pr3+ and one H1+ atom.