Category Sulfate mineral Crystal system Triclinic | Formula
(repeating unit) Na2(UO2)(SO4)2•3H2O Space group P1 | |
Crystal class Pinacoidal (1)
(same H-M symbol) Unit cell a = 7.96, b = 8.20,
c = 9.81 [Å]; α = 65.97°
β = 70.28°, γ = 91.46° (approximated), Z = 2 | ||
Oppenheimerite is a very rare uranium mineral with the formula Na2(UO2)(SO4)2•3H2O. Chemically related minerals include fermiite, natrozippeite, plášilite, belakovskiite and meisserite. Most of these uranyl sulfate minerals were originally found in the Blue Lizard mine, San Juan County, Utah, US. The mineral is named after American Theoretical physicist J. Robert Oppenheimer.
Contents
Association and origin
Oppenheimerite is associated with other sulfate minerals: fermiite, bluelizardite, wetherillite, blödite, chalcanthite, epsomite, gypsum, hexahydrite, kröhnkite, manganoblödite, sideronatrite, and tamarugite.
Crystal structure
The crystal structure of oppenheimerite is of a new type. It contains chains of the (UO2)(SO4)2(H2O) composition, connected with two types of sodium polyhedra.
References
Oppenheimerite Wikipedia(Text) CC BY-SA