Palygorskite : CSIRO Spectroscopy Database

Palygorskite [ (Mg,Al)₂Si₄O₁₀(OH)·4H₂O ]

Photo by Ken Larsen, Smithsonian Institution. CC0

Formula	(Mg,Al)₂Si₄O₁₀(OH)·4H₂O
Abbreviation	Plg
Classifications	Minerals containing OH, Palygorskite (group), Minerals containing H2O
Luminescence emitter	M[n]OH
IMA Status	Grandfathered (pre-IMA), 1862
Search other databases	webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Crystal symmetry	Monoclinic, Point group 2/m, Space group C2/m (#12)
Tags	Hydrated , Hydroxide , Mineral, Aluminosilicate

Name	Owner	Materials	Phase purity	Image
PFl-1 Palygorskite / Montmorillonite	CSIRO	Fluor-elbaite, Goethite, Montmorillonite, Palygorskite (76.0%), Quartz	76.0	PFl-1 Palygorskite / Montmorillonite Image of Palygorskite, Fluor-elbaite, Goethite, Montmorillonite and Quartz in specimen 'PFl-1 Palygorskite / Montmorillonite' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
MT8388a Palygorskite / Montmorillonite / Quartz	CSIRO	Goethite, Montmorillonite, Palygorskite (66.3%), Quartz	66.3	MT8388a Palygorskite / Montmorillonite / Quartz Image of Palygorskite, Goethite, Montmorillonite and Quartz in specimen 'MT8388a Palygorskite / Montmorillonite / Quartz' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.
API-H46-1 Palygorskite / Montmorillonite / Sepiolite	CSIRO	Montmorillonite, Palygorskite (64.4%), Quartz, Sepiolite	64.4	API-H46-1 Palygorskite / Montmorillonite / Sepiolite Image of Palygorskite, Montmorillonite, Quartz and Sepiolite in specimen 'API-H46-1 Palygorskite / Montmorillonite / Sepiolite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.