nontronite

== English == === Noun === nontronite (countable and uncountable, plural nontronites) (mineralogy) An iron-rich clay mineral of the montmorillonite group === Further reading === David Barthelmy (1997–2026), “Nontronite”, in Webmineral Mineralogy Database. “nontronite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.