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  4. Materials (hierarchy name)
  5. materials (substances)
  6. [materials by composition]
  7. inorganic material
  8. mineral
  9. plattnerite
Scope note
Naturally occurring mineral form of lead dioxide; black crystals or blackish brown masses. In mural paintings, lead-based pigments may convert to plattnerite over time, causing deterioration and blackening to the pictorial surface.
Accepted term: 15-Jul-2024