Deliensite
A valid IMA mineral species
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About Deliensite
Michel Deliens
Formula:
Fe[(UO2)2(SO4)2(OH)2](H2O)7
Colour:
Pale yellow to grayish white
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.268
Crystal System:
Orthorhombic
Name:
For Dr. Michel Deliens (Etterbeek, Brussels, February 27 1939- ), Royal Belgian Institute of Natural History, Brussels, Belgium. He was involved with the description of 25 new uranium minerals.
This page provides mineralogical data about Deliensite.
Unique Identifiers
Mindat ID:
6899
Long-form identifier:
mindat:1:1:6899:0
GUID
(UUID V4):
(UUID V4):
73feb8cc-e4c1-4c77-b2f8-d7f3aa6ea4ca
IMA Classification of Deliensite
Classification of Deliensite
7.EB.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
B : With medium-sized cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Dli | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Deliensite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Pale yellow to grayish white
Streak:
White
Hardness:
2 on Mohs scale
Cleavage:
Perfect
{100}.
{100}.
Comment:
Tenacity described as 'weak'.
Density:
3.268 g/cm3 (Measured) 3.31 g/cm3 (Calculated)
Comment:
Dcalc is based on empirical formula. Using the ideal formula gives 3.26.
Optical Data of Deliensite
Type:
Biaxial (-)
RI values:
nα = 1.432 nβ = 1.470(2) nγ = 1.492(2)
2V:
Measured: 73° , Calculated: 72°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v, weak.
Optical Extinction:
Parallel. X = a; Y = b; Z = c.
Pleochroism:
Non-pleochroic
Comments:
nα was calculated.
Chemistry of Deliensite
Mindat Formula:
Fe[(UO2)2(SO4)2(OH)2](H2O)7
Crystallography of Deliensite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pnn2
Cell Parameters:
a = 15.8514(9) Å, b = 16.2478(7) Å, c = 6.8943(3) Å
Ratio:
a:b:c = 0.976 : 1 : 0.424
Unit Cell V:
1775.6 ų
Z:
4
Morphology:
Tabular habit with a pronounced elongation on [001].
Twinning:
Many crystals are twinned with parting along (010).
Comment:
Cell parameters from Plášil et al. (2012).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.95 Å | (81) |
| 5.90 Å | (100) |
| 4.26 Å | (31) |
| 4.20 Å | (37) |
| 3.94 Å | (71) |
| 3.45 Å | (67) |
| 3.165 Å | (50) |
| 2.893 Å | (41) |
| 2.596 Å | (70) |
| 2.118 Å | (27) |
Comments:
Mas d'Alary village, Occitanie, France. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Deliensite
General Appearance of Type Material:
Sub-millimetric tabular crystals arranged in spherical aggregates. The crystals have a mean length of 0.35 mm and a width of 0.06-0.15 mm. The spherical aggregates are up to 4 mm in diameter.
Place of Conservation of Type Material:
Royal Belgian Institute of Natural Sciences, Brussels.
Geological Setting of Type Material:
Ore in stratiform horizons, as banded lens-like masses. Oxidation zone. Forms as an alteration of uraninite and primary sulfides, with a contribution from the host rocks.
Associated Minerals at Type Locality:
Synonyms of Deliensite
Other Language Names for Deliensite
German:Deliensit
Spanish:Deliensita
Common Associates
Associated Minerals Based on Photo Data:
| 4 photos of Deliensite associated with Uraninite | UO2 |
| 4 photos of Deliensite associated with Gypsum | CaSO4 · 2H2O |
| 2 photos of Deliensite associated with Zippeite Group | |
| 1 photo of Deliensite associated with Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 1 photo of Deliensite associated with Rabejacite | Ca(UO2)4(SO4)2(OH)6 · 6H2O |
| 1 photo of Deliensite associated with Trögerite | (H3O)(UO2)(AsO4) · 3H2O |
| 1 photo of Deliensite associated with Pitchblende | UO2 |
| 1 photo of Deliensite associated with Aragonite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 7.EB. | Bobcookite | NaAl(UO2)2(SO4)4 · 18H2O |
| 7.EB. | Alwilkinsite-(Y) | Y(UO2)3(SO4)2O(OH)3(H2O)7 · 7H2O |
| 7.EB. | Gurzhiite | Al(UO2)(SO4)2F · 10H2O |
| 7.EB.I | Shinarumpite | [Co(H2O)6][(UO2)(SO4)2(H2O)] · 4H2O |
| 7.EB. | Zincorietveldite | Zn(UO2)(SO4)2(H2O)5 |
| 7.EB. | Chenowethite | Mg(H2O)6[(UO2)2(SO4)2(OH)2] · 5H2O |
| 7.EB.05 | Johannite | Cu(UO2)2(SO4)2(OH)2 · 8H2O |
| 7.EB.05 | Meitnerite | (NH4)(UO2)(SO4)(OH) · 2H2O |
| 7.EB.10 | Rietveldite | Fe(UO2)(SO4)2(H2O)5 |
| 7.EB.15 | Leydetite | Fe(UO2)(SO4)2 · 11H2O |
| 7.EB.15 | Magnesioleydetite | Mg(UO2)(SO4)2 · 11H2O |
| 7.EB.15 | Straßmannite | Al(UO2)(SO4)2F · 16H2O |
| 7.EB.20 | Greenlizardite | (NH4)Na(UO2)2(SO4)2(OH)2 · 4H2O |
| 7.EB.25 | Markcooperite | Pb2(UO2)(TeO6) |
Fluorescence of Deliensite
Not fluorescent.
Other Information
Thermal Behaviour:
The TGA curve shows that dehydration and dehydroxylation occur over an extended range between 110 and 500°C, corresponding to a loss of 8.6 wt.%. Between 500 and 800°C, decomposition of the sulfate group takes place, corresponding to a loss of 17.9 wt.%.
Notes:
Readily soluble in dilute HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Deliensite
mindat.org URL:
https://www.mindat.org/min-6899.html
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References for Deliensite
Reference List:
Vochten, R., Blaton, N., Peeters, O. (1997) Deliensite, Fe(UO2)2(SO4)2(OH)2·3H2O, a new ferrous uranyl sulfate hydroxyl hydrate from Mas D'Alary, Lodève, Hérault, France. The Canadian Mineralogist, 35 (4) 1021-1025
Plášil, J., Hauser, J., Petříček, V., Meisser, N., Mills, S. J., Škoda, R., Fejfarová, K., Čejka, J., Sejkora, J., Hloušek, J., Johannet, J.-M., Machovič, V., Lapčák, L. (2012) Crystal structure and formula revision of deliensite, Fe[(UO2)2(SO4)2(OH)2](H2O)7. Mineralogical Magazine, 76 (7) 2837-2860 doi:10.1180/minmag.2012.076.7.14
Localities for Deliensite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
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Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany