Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are oxygen (55.78%), silicon (21.76%), aluminium (20.90%), and hydrogen (1.56%). It is a member of the kaolinite group. Halloysite typically forms by hydrothermal alteration of alumino-silicate minerals.[4] It can occur intermixed with dickite, kaolinite, montmorillonite and other clay minerals. X-ray diffraction studies are required for positive identification. It was first described in 1826, and subsequently named after, the Belgian geologist Omalius d'Halloy.
^Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1995). "Halloysite" (PDF). Handbook of Mineralogy. Vol. II, 2003 Silica, Silicates. Chantilly, VA, US: Mineralogical Society of America. ISBN 978-0962209710.
^"Halloysite: Halloysite mineral information and data". mindat.org.
^Barthelmy, Dave. "Halloysite Mineral Data". webmineral.com.
^Cite error: The named reference Kerr_1952 was invoked but never defined (see the help page).
Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are oxygen (55.78%), silicon (21.76%), aluminium...
cation-exchange capacity (1–15 meq/100 g). Rocks that are rich in kaolinite, and halloysite, are known as kaolin (/ˈkeɪ.əlɪn/) or china clay. In many parts of the...
Halloysite (endellite): Two common forms are found, when hydrated the clay exhibits a 1 nm spacing of the layers and when dehydrated (meta-halloysite)...
conditions and to halloysite-10Å (endellite) in acidic conditions (pH 5 or lower). Halloysite-10Å can further transform into halloysite-7Å by drying. Montmorillonite...
of Coastal Research: 97–112. JSTOR 25736978. Bates, Thomas F. (1962). "Halloysite and Gibbsite Formation in Hawaii". Clays and Clay Minerals. pp. 315–328...
groups: Kaolin group which includes the minerals kaolinite, dickite, halloysite, and nacrite (polymorphs of Al2Si2O5(OH)4). Some sources include the...
different cases, this name could mean different minerals, most often halloysite (from the proper name), saponite (soapstone),: 187 bentonite or montmorillonite...
55.78% oxygen. It has the same composition as kaolinite, nacrite, and halloysite, but with a different crystal structure (polymorph). Dickite sometimes...
material weathered from intermediate to basic parent rock and kaolinite, halloysite and iron oxides dominate their clay mineralogy. Nitisols are technically...
nanospheres (with controlled size) when it is grown in the presence of halloysite nanotubes. The high pH and high temperature of the aqueous solution helps...
mineral assemblage consisting of hematite, gibbsite, goethite, anatase, halloysite and kaolinite. Laterite ores were the major source of early nickel.: 1 ...
of hollow spherules ~3–5 nm in diameter. Allophane can alter to form halloysite under resilicating aqueous conditions and can alter to form gibbsite under...
Nano-Structures and Nano-Objects. His most cited work concerns the application of a Halloysite clay nanotube to achieve a delayed release of antioxidants in a rubber...
soils on anorthosite have a dominance of 1:1 clay minerals (kaolinite and halloysite) in contrast to more mafic rock over which 2:1 clays develop. Anorthosite...
Global Information