Mineral Factbook

Palygorskite

(Mg,Al)2Si4O10(OH)·4H2OIMA symbol: Plggrandfathered

Palygorskite is a silicate mineral with the formula (Mg,Al)2Si4O10(OH)·4H2O, crystallizing in the monoclinic system. It has a calculated density of 2.23 g/cm3.

Photos

Palygorskite specimen photo
Vyacheslav Bukharov · CC BY-SA 4.0 · Commons
Palygorskite specimen photo
The Bushranger · CC BY-SA 4.0 · Commons
Palygorskite specimen photo
Mai Seppel · CC BY-SA 4.0 · Commons
Palygorskite specimen photo
Shannon Heinle · CC0 · Commons

Crystallography

Crystal systemmonoclinic crystal systemWikidata (CC0)
Space groupC 1 2/m 1
Cell (Å, °)a = 13.304, b = 17.876, c = 5.251; α = 90, β = 107.01, γ = 90
Cell volume1194.17 ų, Z = 4
Axial ratios0.7442:1:0.2937calculated from COD 9005565
Source structureCOD 9005565 (European Journal of Mineralogy, 2003) — 1 of 5 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)10.3654.4693.2412.5114.1263.18
I/I₀1002018.512.51211.5

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9005565; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)2.23 g/cm³calculated from COD 9005565

Classification

Nickel-Strunz (10th)9.EE.20Wikidata (CC0)
Nickel-Strunz (9th)9.EE.20Wikidata (CC0)
Dana (8th)74.3.1a.1Wikidata (CC0)