Nontronite

Formula: CaTiSiO₅Mohs scale hardness: 1.5 to 2Specific gravity: 2,3Nontronite 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 montmorillonite, nontronite can have variable amounts of adsorbed water associated with the interlayer surfaces and the exchange cations.Nontronite forms from the weathering of biotite and basalts, precipitation of iron and silicon rich hydrothermal fluids and in deep sea hydrothermal vents.The behavior of minerals in flotation: Nontronite has a negative effect on the flotation of any minerals. He sticks to the minerals and prevents them float. It absorbs the reagents and their expense increases. It has a small hardness. Very small particles are formed by grinding. These particles have a small density. They hover in the water. Nontronite swells in water. The negative effect is increased tenfold.

References

1. https://en.wikipedia.org

2. www.geologypage.com

3. https://www.tumblr.com/search/nontronite

4. https://en.wikipedia.org/wiki/Nontronite