Rebuttal of the Existence of Solid Rare Earth Bicarbonates and the Crystal Structure of Holmium Nitrate Pentahydrate |
| |
| Authors: | Christine Rincke Horst Schmidt Wolfgang Voigt |
| |
| Affiliation: | 1. +49‐3731/39‐4058;2. Institute for Inorganic Chemistry, TU Bergakademie Freiberg, Freiberg, Germany |
| |
| Abstract: | The synthesis routes of Gd(HCO3)3 · 5H2O and Ho(HCO3)3 · 6H2O, which are the only known bicarbonates of rare earth metals, were refuted and the published crystal structures were discussed. Because of the structural relationship of Ho(HCO3)3 · 6H2O to rare earth nitrate hexahydrates, 1 the synthesis of holmium nitrate hydrate was considered and the crystal structure of Ho(NO3)3 · 5H2O was solved by single crystal X‐ray diffraction measurements. Ho(NO3)3 · 5H2O was determined to crystallize in the triclinic space group P1 (no. 2) with a = 6.5680(14) Å, b = 9.503(2) Å, c = 10.462(2) Å, α = 63.739(14)°, β = 94.042(2)° and γ = 76.000(16)°. The crystal structure consists of isolated [Ho(H2O)4(NO3)3] polyhedra and non‐coordinating water molecules. It is isotypic to other rare earth nitrate pentahydrates. |
| |
| Keywords: | Rare earth Bicarbonate Nitrate Structure elucidation X‐ray diffraction |
|
|
