Halloysite

Properties

Formula Al2Si2O5(OH)4
Abbreviation Hly-7Å
Classification Kaolinite (subgroup)
IMA Status Grandfathered (pre-IMA), 1826
Search other databases webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Related materials Dickite, Halloysite-7Å, Kaolinite, Nacrite
Crystal symmetry Monoclinic, Point group m, Space group Cc (#9)
Tags Hydroxide , Mineral, Aluminosilicate

Composition

Element Atoms
O 9
H 4
Si 2
Al 2
Total: 17