(Butane-1,2,3,4-tetraol-κ³O¹,O²,O³)(ethanol-κO)tris­(nitrato-κ²O,O′)holmium(III)

In the title Ho^III–erythritol complex, [Ho(NO₃)₃(C₄H₁₀O₄)(C₂H₅OH)], the Ho^III cation is chelated by a tridentate erythritol ligand and three bidentate nitrate anions. An ethanol mol­ecule further coordinates the Ho^III cation, completing the irregular O₁₀ coordination geometry. In the crystal, an extensive O—H...O hydrogen-bond network links the mol­ecules into a three-dimensional supra­molecular structure.