Structure
Lead tetroxide has a tetragonal crystal structure at room temperature, which transforms to an orthorhombic (Pearson symbol oP28, Space group = Pbam, No 55) form at temperature 170 K. This phase transition only changes the symmetry of the crystal and slightly modifies the interatomic distances and angles.
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Unit cell of tetragonal Pb3O4
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Part of tetragonal red lead's crystal structure
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