Manganese silicate

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A yellow-red, crystalline material that occurs in nature in the minerals rhodonite, manganjustite and tephroite. Manganese silicate is used as a red colorant in glass and ceramic glazes.

Synonyms and Related Terms

rhodonite, manganjustite; tephroite


  • Toxic.
  • Inhalation or ingestion of manganese can cause a nervous system disorder.
  • NIH: Technical sheet

Physical and Chemical Properties

Insoluble in water

Composition approx. MnSiO3
CAS 7759-00-4
Melting Point 1323 C
Density 3.48 g/ml

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5781

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