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Vermiculite rising

By Siobhan Lismore-Scott
Published: Thursday, 28 June 2018

New supply from Uganda and Turkey pushed up global vermiculite production in 2017. Meanwhile, prices have increased out of the United States because customers are demanding higher grades.

Vermiculite is a hydrated magnesium-aluminium silicate - its typical composition is 38-46% silica (SiO2), 10-16% alumina (Al2O3), 16-35% magnesia (MgO) and other compounds such as calcium, iron, potassium and titanium oxide. 

Owing to its lamellar structure, similar to that of mica, vermiculite expands 6-30 times the original volume of vermiculite...

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