A thermal analysis of the system PbBr2–PbO proved the existence of four compounds intermediate between PbBr2 and PbO, namely PbBr2·PbO, PbBr2·2PbO, PbBr2·3PbO, and PbBr2·7PbO. The compound PbBr2·PbO was unstable above 497°C whereas the others were stable at their melting points. Pure PbBr2·PbO·H2O (or Pb(OH)Br) was prepared and was found to decompose into PbBr2·PbO at temperatures above 150°C. This work offers an explanation for the discrepancies among data reported in the literature for the melting point of lead bromide.
No takes yet. Share an insight, caveat, or question.
L. M. Knowles (1951) studied this question.