Sherman, GD; Ikawa, Haruyoshi; Uehara, Goro; Okazaki, Ernest
(University of Hawai'i Press, 1962-01)
Nontronite, the iron-rich dioctahedral mineral
of the montmorillonite group, is rarely
found in soils. A number of montmorillonite
clays having a high content of iron oxide have
been found in subsoils. These occurrences ...