Rietveldite
A valid IMA mineral species
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About Rietveldite
Hugo M. Rietveld
Formula:
Fe(UO2)(SO4)2(H2O)5
Colour:
Brownish-yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.31
Crystal System:
Orthorhombic
Name:
Named to honor the Dutch crystallographer Hugo M. Rietveld (7 March 1932, The Hague, Netherlands – 16 July 2016) - the father of the Rietveld refinement: a unique method providing structural data (e.g., unit cell parameters, quantitative phase analysis, etc.) from Powder X-Ray Diffraction patterns.
The Fe analogue of zincorietveldite. Structurally related to svornostite. Chemically related to deliensite and leydetite (the latter being a higher hydrate).
Known as a synthetic compound.
Occurs in association with other post-mining supergene uranyl sulfates and U-free sulfates.
Known as a synthetic compound.
Occurs in association with other post-mining supergene uranyl sulfates and U-free sulfates.
Unique Identifiers
Mindat ID:
50771
Long-form identifier:
mindat:1:1:50771:2
GUID
(UUID V4):
(UUID V4):
210fbccd-407f-4358-8905-fd83b8c68d9d
IMA Classification of Rietveldite
Approved
Approval year:
2016
First published:
2017
Type description reference:
Classification of Rietveldite
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 |
|---|---|---|
| Rvd | 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 Rietveldite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Brownish-yellow
Comment:
Powdery aggregates have yellowish beige color
Streak:
White
Hardness:
2 on Mohs scale
Comment:
~2
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {010}, and fair on {100} and {001}.
Good on {010}, and fair on {100} and {001}.
Density:
3.31 g/cm3 (Measured) 3.37 g/cm3 (Calculated)
Optical Data of Rietveldite
Type:
Biaxial (+)
RI values:
nα = 1.570(1) nβ = 1.577(1) nγ = 1.586(1)
2V:
Measured: 82° (1), Calculated: 83.3°
Max Birefringence:
δ = 0.016
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:
Very strong (r > v)
Pleochroism:
Weak
Comments:
Exhibits barely noticeable pleochroism in shades of light brownish yellow color, Y < X ≈ Z
Chemistry of Rietveldite
Mindat Formula:
Fe(UO2)(SO4)2(H2O)5
Crystallography of Rietveldite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmn21
Setting:
Pmn21
Cell Parameters:
a = 12.9577(9) Å, b = 8.3183(3) Å, c = 11.2971(5) Å
Ratio:
a:b:c = 1.558 : 1 : 1.358
Unit Cell V:
1217.7 ų
Z:
4
Morphology:
Thin blades up to 0.5 mm long, elongated on [001] and flattened on {010}.
Comment:
Also given as 6.453, 11.222, 8.276 Å, in non-standard space-group setting Pm21b.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.309 Å | (34) |
| 6.477 Å | (100) |
| 5.110 Å | (58) |
| 4.668 Å | (48) |
| 4.653 Å | (36) |
| 3.428 Å | (41) |
| 3.341 Å | (33) |
| 3.238 Å | (49) |
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 Rietveldite
Co-Type Localities:
General Appearance of Type Material:
Blades up to 0.5 mm long
Place of Conservation of Type Material:
Collections of the Natural History Museum of Los Angeles County, Los Angeles, USA (catalogue nr. 66291 and 66292), and the TU Bergakademie Freiberg,Germany (catalogue nr 84140), the National Museum Prague, Prague, Czech Republic, catalogue nr P1N 45564
Reference:
Kampf, A.R., Sejkora, J., Witzke, T., Plášil, J., Čejka, J., Nash, B.P., Marty, J. (2017) Rietveldite, Fe(UO2)(SO4)2(H2O)5, a new uranyl sulfate mineral from Giveaway-Simplot mine (Utah, USA), Willi Agatz mine (Saxony, Germany) and Jáchymov (Czech Republic). Journal of Geosciences: 62: 107-120.
Synonyms of Rietveldite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Rietveldite associated with Ferricopiapite | Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O |
| 1 photo of Rietveldite associated with Bobcookite | NaAl(UO2)2(SO4)4 · 18H2O |
| 1 photo of Rietveldite associated with Gypsum | CaSO4 · 2H2O |
| 1 photo of Rietveldite associated with Asphaltite | |
| 1 photo of Rietveldite associated with Tamarugite | NaAl(SO4)2 · 6H2O |
| 1 photo of Rietveldite associated with Ferrinatrite | Na3Fe(SO4)3 · 3H2O |
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 | Deliensite | Fe[(UO2)2(SO4)2(OH)2](H2O)7 |
| 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 Rietveldite
Does not exhibit fluorescence under either long- or short-wave UV
Other Information
Notes:
Easily soluble in room-temperature H2O
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 Rietveldite
mindat.org URL:
https://www.mindat.org/min-50771.html
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References for Rietveldite
Reference List:
Witzke, T. (1990) Diploma thesis, Bergakademie Freiberg, Germany. [as Unnamed Fe-Al uranyl sulphate]
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter No 34. Mineralogical Magazine, 80 (7) 1315-1321 doi:10.1180/minmag.2016.080.086
Localities for Rietveldite
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.
Czech Republic (TL) | |
| Mineralogical Magazine: 80: 1315–132 +2 other references |
| Sejkora J (2019) |
Germany | |
| Draxler et al. (05/2020) |
| Witzke (2016) +1 other reference |
Russia | |
| Kasatkin (2019) |
USA | |
| SEM-EDS and XRD analyzed by Joy Desor |
| Mineralogical Magazine: 80: 1315–1321 +2 other references |
| Kampf et al. (2023) |
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Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany