Über Blei (II)‐oxidhydrat der Zusammensetzung 3PbO·H₂O

Abstract

Abstract Lead oxide hydrate mentioned in the earlier literature with several formulas between PbO · H 2 O and PbO · 0.33 H 2 O has been synthesized and investigated by high resolution X ‐ray powder methods, thermogravimetry and infrared spectroscopy. The unit cell was found from 62 powder reflections to be tetragonal with a = 8.009 ± 0.003 Å, c = 9.312 ± 0.005 Å, Z = 12 [PbO · 0.33 H 2 O]. These data were confirmed by W EISSENBERG and Precession photographs of single crystals grown as a corrosion product on metallic lead. The space group is D – P 4/ mnc or C – P 4 nc . Thermogravimetric measurements, corrected for a slight content of superficially bound carbon dioxide detected by infrared spectroscopy, lead to the most probable formula 3 PbO · H 2 O or PbO · 0.33 H 2 O. As infrared spectra show the presence of a HOH deformation vibration, the compound is considered to be an oxide hydrate and not an oxide hydroxide of lead.