Mineral Factbook

Zippeite

K2[(UO2)4(SO4)2O2(OH)2](H2O)4IMA symbol: Zipredefined

Zippeite is a sulfate mineral with the formula K2[(UO2)4(SO4)2O2(OH)2](H2O)4, crystallizing in the monoclinic system. It has a Mohs hardness of 2, a calculated density of 4.735 g/cm3.

Photos

Zippeite specimen photo
Jędrzej Pełka · CC BY-SA 4.0 · Commons
Zippeite specimen photo
Jędrzej Pełka · CC BY-SA 3.0 · Commons
Zippeite specimen photo
Jędrzej Pełka · CC BY-SA 3.0 · Commons
Zippeite specimen photo
Jędrzej Pełka · CC BY-SA 3.0 · Commons

Crystallography

Crystal systemmonoclinic crystal systemWikidata (CC0)
Space groupC 1 2 1
Cell (Å, °)a = 8.7524, b = 13.9197, c = 17.6972; α = 90, β = 104.178, γ = 90
Cell volume2090.39 ų, Z = 4
Axial ratios0.6288:1:1.2714calculated from COD 9004754
Source structureCOD 9004754 (The Canadian Mineralogist, 2003) — 1 of 10 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)6.963.1063.1123.483.488.579
I/I₀1003735.821.720.219.4

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9004754; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)4.735 g/cm³calculated from COD 9004754
Hardness (Mohs)
2single sourceWikidata (CC0)

Chemistry (calculated)

Molecular weight1488.51 g/molcalculated from the IMA formula
Composition (wt%)K 5.25%, U 63.96%, O 25.8%, S 4.31%, H 0.68%

Classification

Nickel-Strunz (10th)7.EC.05Wikidata (CC0)
Nickel-Strunz (9th)7.EC.05Wikidata (CC0)
Dana (8th)31.10.4.1Wikidata (CC0)