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Paulscherrerite

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About PaulscherreriteHide

Paul Scherrer
Formula:
UO2(OH)2
Colour:
canary yellow
Specific Gravity:
6.66 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in 2011 by Joël Brugger, Nicolas Meisser, Barbara Etschmann, Stefan Ansermet, Allan Pring in honor of Paul Scherrer [February 3, 1890 Saint Gallen, Switzerland – September 25, 1969 Zürich, Switzerland], Swiss physicist, professor of experimental physics in the Eidgenössische Technische Hochschule of Zürich, Switzerland, and president of the Swiss Atomic Energy Commission. In 1918, together with Paul Debye, he developed a technique for crystal structure determination by X-ray diffraction on powders (Debye-Scherrer technique). He is also known for the Scherrer equation, which describes the dependence of line broadening of reflected X-rays on crystal size for small particles.
Occurs as a dehydration product of metaschoepite.
Previously, generally called 'dehydrated schoepite.'


Classification of PaulscherreriteHide

Approved
Approval Year:
2008
4.GA.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
5.2.2.

5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O

Physical Properties of PaulscherreriteHide

Colour:
canary yellow
Streak:
canary yellow
Density:
6.66 g/cm3 (Calculated)

Chemical Properties of PaulscherreriteHide

Formula:
UO2(OH)2
IMA Formula:
(UO2)(OH)2

Crystallography of PaulscherreriteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 4.281 Å, b = 10.230 Å, c = 6.865 Å
β = 90.35°
Ratio:
a:b:c = 0.418 : 1 : 0.671
Unit Cell V:
300.64 ų (Calculated from Unit Cell)
Comment:
pseudo-orthorhombic

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.085 (64)
3.424 (100)
3.405 (27)
2.848 (18)
2.483 (23)
1.9854 (13)
1.9737 (23)
1.7820 (9)

Type Occurrence of PaulscherreriteHide

General Appearance of Type Material:
Powdery, pseudomorphs. intimately admixed with significant amounts of metaschoepite
Place of Conservation of Type Material:
Holotype material (G31382) is deposited in the South Australian Museum, North Terrace, 5000 Adelaide, Australia, and cotype material (MGL 79287) in the Musée Géologique, UNIL-Anthropole, 1015 Lausanne, Switzerland.
Associated Minerals at Type Locality:

Synonyms of PaulscherreriteHide

Relationship of Paulscherrerite to other SpeciesHide

Member of:
Other Members of this group:
Metaschoepite(UO2)8O2(OH)12 · 10H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
Schoepite(UO2)8O2(OH)12 · 12H2OOrth. mmm (2/m 2/m 2/m) : Pbca

Related Minerals - Nickel-Strunz GroupingHide

4.GA.05Metaschoepite(UO2)8O2(OH)12 · 10H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
4.GA.05ParaschoepiteUO3 · 2H2OOrth.
4.GA.05Schoepite(UO2)8O2(OH)12 · 12H2OOrth. mmm (2/m 2/m 2/m) : Pbca
4.GA.10IanthiniteU4+(UO2)5O7 · 10H2OOrth. mm2 : Amm2
4.GA.15MetastudtiteUO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
4.GA.15Studtite[(UO2)(O2)(H2O)2] · H2OMon.

Related Minerals - Dana Grouping (8th Ed.)Hide

5.2.2.1MasuyitePb(UO2)3O3(OH)2 · 3H2OOrth.

Other InformationHide

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 PaulscherreriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Finch, R. J., Hawthorne, F. C., Miller, M. L. & Ewing, R. C. (1997): Distinguishing among schoepite, [(UO2)8O2(OH)12](H2O)12, and related minerals by X-ray powder diffraction. Powder Diffraction 12, 230-238.
Finch, R.J., Hawthorne, F.C. and Ewing, R.C. (1998): Structural relations among schoepite, metaschoepite and "dehydrated schoepite". Canadian Mineralogist 36, 831-845.
Sowder, A. G.; Clark, S. B.; Fjeld, R. A. (1999): The transformation of uranyl oxide hydrates: The effect of dehydration on synthetic metaschoepite and its alteration to becquerelite. Environ. Sci. Technol. 33, 3552-3557. [as dehydrated schoepite]
Brugger, J., Meisser, N., Etschmann, B., Ansermet, S., Pring, A. (2011): Paulscherrerite from the Number 2 Workings, Mount Painter Inlier, Northern Flinders Ranges, South Australia: "dehydrated schoepite" is a mineral after all. American Mineralogist 96, 229-240.

Internet Links for PaulscherreriteHide

Localities for PaulscherreriteHide

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.
Australia (TL)
 
  • South Australia
    • Flinders Ranges
      • North Flinders Ranges
        • Arkaroola Region (Arkaroola Wilderness Sanctuary; Arkaroola Station)
          • Mt Painter area
Brugger, J., Meisser, N., Etschmann, B., Ansermet, S., & Pring, A. (2011). Paulscherrerite from the Number 2 Workings, Mount Painter Inlier, Northern Flinders Ranges, South Australia:“Dehydrated schoepite” is a mineral after all. American Mineralogist, 96(2-3), 229-240.
USA
 
  • New Hampshire
    • Grafton Co.
      • Grafton
Brugger, J., Meisser, N., Etschmann, B., Ansermet, S., Pring, A. (2011): Paulscherrerite from the Number 2 Workings, Mount Painter Inlier, Northern Flinders Ranges, South Australia: “dehydrated schoepite” is a mineral after all. American Mineralogist, 96
      • Groton
Brugger, J., Meisser, N., Etschmann, B., Ansermet, S., Pring, A. (2011): Paulscherrerite from the Number 2 Workings, Mount Painter Inlier, Northern Flinders Ranges, South Australia: “dehydrated schoepite” is a mineral after all. American Mineralogist, 96
Mineral and/or Locality  
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