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Phase equilibria of the PbO–SiO2 system have been established for a wide range of compositions: (i) liquid in equilibrium with silica polymorphs (quartz, tridymite, and cristobalite) between 740°C and 1580°C, at 60‐90 mol% SiO2; (ii) with lead silicates (PbSiO3, Pb2SiO4, and Pb11Si3O17) and lead oxide (PbO) between 700°C and 810°C. A high‐temperature equilibration/quenching/electron probe X‐ray microanalysis...
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