Abstract
1. An investigation of the reaction of Nd(OH)3 with H2O2 within wide concentration limits made it possible to distinguish two phases of the peroxide type: Nd2O5 · 2H2O and Nd2O4 · 2H2O. 2. Anhydrous neodymium peroxide compounds were not obtained when the “residues” Nd2O5 · 2H2O and Nd2O4 · 2H2O were separated and subsequently dehydrated. 3. The probable formulas of the peroxide-type solid phases which were distinguished are characterized by the presence of perhydroxyl and hydroxyl groups, and by oxygen bonds between neodymium atoms.
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