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Rietveldite

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About RietvelditeHide

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.
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.


Classification of RietvelditeHide

Approved
Approval Year:
2016
First Published:
2017

Physical Properties of RietvelditeHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Brownish-yellow
Comment:
Powdery aggregates have yellowish beige color
Streak:
White
Hardness:
Comment:
~2
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {010}, and fair on {100} and {001}.
Density:
3.31 g/cm3 (Measured)    3.37 g/cm3 (Calculated)

Optical Data of RietvelditeHide

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.
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

Chemical Properties of RietvelditeHide

Formula:
Fe(UO2)(SO4)2(H2O)5

Crystallography of RietvelditeHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.309(34)
6.477(100)
5.110(58)
4.668(48)
4.653(36)
3.428(41)
3.341(33)
3.238(49)

Type Occurrence of RietvelditeHide

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 RietvelditeHide

Fluorescence of RietvelditeHide

Does not exhibit fluorescence under either long- or short-wave UV

Other InformationHide

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.

References for RietvelditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Serezkhin, V.N., Serezkhina, L.B. (1978) Russian Journal of Inorganic Chemistry: 23: 414–416.
Witzke, T. (1990) Diploma thesis, Bergakademie Freiberg, Germany. [as Unnamed Fe-Al uranyl sulphate]
Witzke, T. (2016) Fe(UO2)(SO4)2∙5H2O, a new uranyl sulfate mineral from the Willi Agatz mine, Dresden, Saxony, Germany. New Minerals and Mineralogy in the 21th Century - International scientific symposium Jáchymov 2016, Jáchymov, Czech Republic, September 3-5, 2016, Book of abstracts: 109-110.
Kampf, A.R., Sejkora, J., Witzke, T., Plášil, J., Čejka, J., Nash, B.P., Marty, J. (2016) Rietveldite, IMA 2016-081. CNMNC Newsletter No. 34, December 2016, page 1320; Mineralogical Magazine: 80: 1315–1321
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.

Internet Links for RietvelditeHide

Localities for RietvelditeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic (TL)
 
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
Kampf, A.R., Sejkora, J., Witzke, T., Plášil, J., Čejka, J., Nash, B.P., Marty, J. (2016): Rietveldite, IMA 2016-081. CNMNC Newsletter No. 34, December 2016, page 1320; Mineralogical Magazine: 80: 1315–132; 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.
Germany (TL)
 
  • Saxony
    • Dresden
Witzke, T. (2016): Fe(UO2)(SO4)2∙5H2O, a new uranyl sulfate mineral from the Willi Agatz mine, Dresden, Saxony, Germany. New Minerals and Mineralogy in the 21th Century - International scientific symposium Jáchymov 2016, Jáchymov, Czech Republic, September 3-5, 2016, Book of abstracts, 109-110.; 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.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Sejkora, J., Witzke, T., Plášil, J., Čejka, J., Nash, B.P., Marty, J. (2016): Rietveldite, IMA 2016-081. CNMNC Newsletter No. 34, December 2016, page 1320; Mineralogical Magazine: 80: 1315–1321; 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.
Mineral and/or Locality  
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