palygorskite
noun
pal·y·gor·skite
ˌpaləˈgȯrˌskīt
plural -s
: a hydrous basic silicate (Mg3, Al2)Si4O10(OH)2.H2O of magnesium and aluminum that belongs to the family of clay minerals
Word History
Etymology
modification of German paligorskit, from the locality in the Ural mountains near which it was found