Mineral Factbook

Schwertmannite

Fe3+16O16(OH)9.6(SO4)3.2·10H2OIMA symbol: Swmapproved

Schwertmannite is a sulfate mineral with the formula Fe3+16O16(OH)9.6(SO4)3.2·10H2O, crystallizing in the tetragonal system. It has a calculated density of 3.421 g/cm3. Its streak is yellow.

Photos

Schwertmannite specimen photo
Darth vader 92 · CC BY-SA 4.0 · Commons
Schwertmannite specimen photo
Darth vader 92 · CC BY 4.0 · Commons
Schwertmannite specimen photo
Darth vader 92 · CC BY-SA 3.0 · Commons
Schwertmannite specimen photo
Darth vader 92 · CC BY 4.0 · Commons

Crystallography

Crystal systemtetragonal crystal systemWikidata (CC0)
Space groupP 1
Cell (Å, °)a = 10.821, b = 6.002, c = 10.514; α = 90, β = 92.6, γ = 90
Cell volume682.157 ų, Z = 16
Axial ratios1.8029:1:1.7517calculated from COD 9015059
Source structureCOD 9015059 (American Mineralogist, 2010) — 1 of 2 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)7.3687.715.4055.2522.5592.52
I/I₀1009266.734.127.627.4

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015059; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)3.421 g/cm³calculated from COD 9015059
Streak
yellowsingle sourceWikidata (CC0)

Classification

Nickel-Strunz (10th)7.DE.15Wikidata (CC0)
Nickel-Strunz (9th)7.DE.15Wikidata (CC0)