Deliensite, Fe(UO (sub 2) ) (sub 2) (SO (sub 4) ) (sub 2) (OH) (sub 2) .3H (sub 2) O, a new ferrous uranyl sulfate hydroxyl hydrate from Mas d'Alary, Lodeve, Herault, France
Deliensite, Fe(UO (sub 2) ) (sub 2) (SO (sub 4) ) (sub 2) (OH) (sub 2) .3H (sub 2) O, a new ferrous uranyl sulfate hydroxyl hydrate from Mas d'Alary, Lodeve, Herault, France
The Canadian Mineralogist (August 1997) 35, Part 4: 1021-1026
- alteration
- chemical composition
- crystal structure
- description
- electron probe data
- Europe
- formula
- France
- Herault France
- hydrates
- infrared spectra
- Lodeve France
- new minerals
- optical properties
- physical properties
- SEM data
- spectra
- sulfates
- Western Europe
- X-ray diffraction data
- Mas d'Alary France
- deliensite
Deliensite occurs in the Mas d'Alary U deposit, associated with uraninite, gypsum and pyrite. The submillimetric tabular crystals arranged in spherical aggregates are pale yellow to greyish white, with a vitreous lustre; D 3.268 g/cm (super 3) ; H. 2; alpha 1.42, beta 1.470, Gamma 1.492, 2V<F128MV>a<F255D>73 degrees ; orientation beta and Gamma in (010), Gamma elongation; r >><$I> v weak; tabular, with perfect 100 cleavage. EPMA and TG analyses gave FeO 7.42, UO (sub 3) 67.63, SO (sub 3) 17.37, H (sub 2) O 8.63, = 101.05, leading to the empirical formula Fe (sub 0.909) (UO (sub 2) ) (sub 2.081) (SO (sub 4) ) (sub 1.949) (OH) (sub 2.0823.179H) (sub 2) O. Indexed XRD powder data are tabulated; strongest lines 5.90(100), 7.95(81), 3.94(71), 2.596(70), 3.45(67) Aa; a 15.908, b 16.274, c 6.903 Aa; space group Pnnm or Pnn2; Z = 4. Deliensite originates from the alteration of uraninite and primary sulphides, with a contribution from the host rocks. The name is to honour Belgian mineralogist Michel Deliens.
