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nontronite

   Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
nontronite [′nän·trə‚nīt]
(mineralogy)
Na(Al,Fe,Si)O10(OH)2An iron-rich clay mineral of the montmorillonite group that represents the end member in which the replacement of aluminum by ferric ion is essentially complete. Also known as chloropal; gramenite; morencite; pinguite.


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