Chameleon mineral


  • Webster's Revised Unabridged Dictionary
    • Chameleon mineral (Chem) the compound called potassium permanganate, a dark violet, crystalline substance, KMnO4, which in formation passes through a peculiar succession of color from green to blue, purple, red, etc. See Potassium permanganate, under Potassium.
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In literature:

Silicated potassa; chameleon mineral.
"Experimental Researches in Electricity, Volume 1" by Michael Faraday