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Montmorillonite Clay

Montmorillonite is a very soft phyllosilicate group of minerals that typically form in microscopic crystals, forming a clay. It is named after Montmorillon in France. Montmorillonite, a member of the smectite family, is a 2:1 clay, meaning that it has 2 tetrahedral sheets sandwiching a central octahedral sheet. The particles are plate-shaped with an average diameter of approximately one micrometre. Members of this group include saponite.

Montmorillonite is the main constituent of the volcanic ash weathering product, bentonite.

The water content of montmorillonite is variable and it increases greatly in volume when it absorbs water. Chemically it is hydrated sodium calcium aluminium magnesium silicate hydroxide (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O. Potassium, iron, and other cations are common substitutes, the exact ratio of cations varies with source. It often occurs intermixed with chlorite, muscovite, illite, cookeite, and kaolinite.

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Travel and weather- Active volcano

 

Virunga volcanoes is one of Mother Natures most breathtaking masterpieces. Perhaps nowhere on Earth is the dual creative and destructive nature of volcanoes more evident than in central Africa’s Virunga Volcanoes Massif. Straddling the borders between Rwanda, Uganda, and the Democratic Republic of the Congo, the eight-volcano chain is one of Earth’s most active volcanic regions and a veritable salad bowl for mountain gorillas, chimpanzees, elephants, and other wildlife. Landscapes in all three countries conjure visions of both Eden and hell.

In Congo, the swirling plume of the active Nyiragongo Volcano (above) beckons. IT is advised to check the security situations of this troubled Country before going, but those who make the steep five-hour hike up Nyiragongo are rewarded with heady vistas of the world’s largest lava lake. Spend the night on the rim to fully experience the crater’s fiery light and sound spectacle.

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