Moreauite
A valid IMA mineral species
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About Moreauite
Formula:
Al3(UO2)(PO4)3(OH)2 · 13H2O
Colour:
Greenish yellow
Lustre:
Vitreous
Specific Gravity:
2.64
Crystal System:
Monoclinic
Name:
For Belgian mineralogist, Jules Moreau (28/01/1931 Nimy, Hainaut Province, Belgium - 28/12/2015 Hamme-Mille, Walloon Brabant Province, Belgium), Belgian mineralogist, professor of mineralogy at the University of Louvain-la-Neuve, Belgium.
This page provides mineralogical data about Moreauite.
Unique Identifiers
Mindat ID:
2780
Long-form identifier:
mindat:1:1:2780:5
GUID
(UUID V4):
(UUID V4):
67950668-cdf5-498a-a1ef-6c3eda9ee203
IMA Classification of Moreauite
Approved
Approval year:
1984
First published:
1985
Classification of Moreauite
8.ED.05
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
D : Unclassified
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
D : Unclassified
42.12.3.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
12 : (AB)4(XO4)3Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
12 : (AB)4(XO4)3Zq·xH2O
19.11.30
19 : Phosphates
11 : Phosphates of U
19 : Phosphates
11 : Phosphates of U
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 |
|---|---|---|
| Moa | 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 Moreauite
Vitreous
Transparency:
Translucent, Opaque
Colour:
Greenish yellow
Cleavage:
Distinct/Good
Good on {100}, micaceous.
Good on {100}, micaceous.
Density:
2.64(5) g/cm3 (Measured) 2.61 g/cm3 (Calculated)
Optical Data of Moreauite
Type:
Biaxial (-)
RI values:
nα = 1.540(3) nβ = 1.552(2) nγ = 1.558(2)
2V:
Measured: 70° , Calculated: 70°
Max Birefringence:
δ = 0.018
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:
Low
Dispersion:
weak
Chemistry of Moreauite
Mindat Formula:
Al3(UO2)(PO4)3(OH)2 · 13H2O
Crystallography of Moreauite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 23.41(6) Å, b = 21.44(4) Å, c = 18.34(3) Å
β = 92.0(1)°
β = 92.0(1)°
Ratio:
a:b:c = 1.092 : 1 : 0.855
Unit Cell V:
9,199.43 ų (Calculated from Unit Cell)
Z:
16
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.80 Å | (100) |
| 11.69 Å | (80) |
| 9.13 Å | (70) |
| 2.931 Å | (70) |
| 14.02 Å | (60) |
| 3.043 Å | (60) |
| 5.43 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23) |
Type Occurrence of Moreauite
General Appearance of Type Material:
Nodules and books of plates flattened on (100).
Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren
Geological Setting of Type Material:
Uranium-bearing oxidized zone of a complex granite pegmatite.
Associated Minerals at Type Locality:
Reference:
Deliens, M., Piret, P. (1985) Les phosphates d'uranyle et d'aluminium de Kobokobo VII. La moreauïte, Al3UO2(PO4)3(OH)2·13H2O, nouveau minéral. Bulletin de Minéralogie: 108: 9-13.
Synonyms of Moreauite
Other Language Names for Moreauite
Related Minerals - Strunz-mindat Grouping
| 8.ED.10 | Asselbornite | Pb(BiO)3(UO2)4(AsO4)2(OH)7 · 4H2O |
| 8.ED.10 | Metalodèvite | Zn(UO2)2(AsO4)2 · 10H2O |
| 8.ED.10 | Šreinite | Pb(BiO)3(UO2)4(PO4)2(OH)7 · 4H2O |
| 8.ED.15 | Kamitugaite | PbAl[(UO2)5(PO4)2.38(AsO4)0.62O2(OH)2] · 11.5H2O |
| 8.ED.20 | Nielsbohrite | K(UO2)3(AsO4)(OH)4 · H2O |
Fluorescence of Moreauite
bright green fluorescence under SW and LW
Other Information
Notes:
Radioactive
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 Moreauite
mindat.org URL:
https://www.mindat.org/min-2780.html
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References for Moreauite
Reference List:
Deliens, Michel, Piret, Paul (1985) Les phosphates d'uranyle et d'aluminium de Kobokobo. VII. La moreauïte, Al3UO2(PO4)3(OH)2·13H2O, nouveau minéral. Bulletin de Minéralogie, 108 (1) 9-13 doi:10.3406/bulmi.1985.7853
Dunn, Pete J., Ferraiolo, James A., Fleischer, Michael, Gobel, Volker, Grice, Joel D., Langley, Richard H., Shigley, James E., Vanko, David A., Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (11-12) 1329-1335
Localities for Moreauite
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.
DR Congo (TL) | |
| Deliens et al. (1985) +1 other reference |
Spain | |
| www.foro-minerales.com (n.d.) |
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Valdeíñigos, Tejeda de Tiétar, Cáceres, Extremadura, Spain