1) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/nontronite
Nontronite is the iron(III) rich member of the smectite group of clay minerals. Nontronites typically have a chemical composition consisting of more than ~30% Fe2O3 and less than ~12% Al2O3 (ignited basis). Nontronite generally does not exist in economic deposits like montmorillonite, although it is not an uncommon clay mineral. Like montmorilloni...
Found on
http://en.wikipedia.org/wiki/Nontronite
• (n.) A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron. • (n.) A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.
Found on
http://thinkexist.com/dictionary/meaning/nontronite/
Non'tro·nite noun [ So called because found in the arrondissement of
Notron , France.]
(Min.) A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.
Found on
http://www.encyclo.co.uk/webster/N/32
No exact match found.
