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Plášilite

A valid IMA mineral species
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About PlášiliteHide

06172350015732172303636.jpg
Jakub Plášil
Formula:
Na(UO2)(SO4)(OH) · 2H2O
Colour:
Greenish yellow
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
3.726 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honour of Jakub Plášil (born 1984), crystallographer at the Department of Structure Analysis, Institute of Physics, Academy of Sciences of the Czech Republic, for his significant work on the crystal chemistry of hydrated oxysalts and hexavalent uranium minerals and compounds.
This page provides mineralogical data about Plášilite.


Unique IdentifiersHide

Mindat ID:
46145
Long-form identifier:
mindat:1:1:46145:6
GUID
(UUID V4):
cb736aab-38e8-4cd6-bbd6-cf941fd18914

IMA Classification of PlášiliteHide

Classification of PlášiliteHide

7.EC.50

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
PšlIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of PlášiliteHide

Vitreous
Transparency:
Transparent
Colour:
Greenish yellow
Streak:
White
Hardness:
2 - 3 on Mohs scale
Comment:
Probably between 2 and 3
Tenacity:
Brittle
Cleavage:
Perfect
Two perfect cleavages, {010} and {001}.
Density:
3.726 g/cm3 (Calculated)

Optical Data of PlášiliteHide

Type:
Biaxial (+)
RI values:
nα = 1.556(1) nβ = 1.581(1) nγ = 1.608(1)
2V:
Measured: 88° , Calculated: 89°
Max Birefringence:
δ = 0.052
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
Dispersion is moderate, r < v.
Pleochroism:
Visible
Comments:
X = nearly colourless, Y = very pale yellow, Z = pale yellow; X < Y < Z.

Chemistry of PlášiliteHide

Mindat Formula:
Na(UO2)(SO4)(OH) · 2H2O

Crystallography of PlášiliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.7122(6) Å, b = 13.8368(4) Å, c = 7.0465(2) Å
β = 112.126(8)°
Ratio:
a:b:c = 0.63 : 1 : 0.509
Unit Cell V:
786.89 ų
Z:
4
Morphology:
As long, thin blades, elongated on [001] and flattened on {100}; rarely as prisms, also elongated on [001]. Forms observed : {100}, {010} and {011}.
Twinning:
Commonly twinned on {100}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.90 Å(100)
5.85 Å(99)
4.024 Å(57)
3.492 Å(82)
3.136 Å(40)
2.690 Å(25)
2.618 Å(34)
1.9212 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]
47f : [Uranyl (U⁶⁺) minerals]
Stage 10b: Anthropogenic minerals<10 Ka
55 : Anthropogenic mine minerals

Type Occurrence of PlášiliteHide

General Appearance of Type Material:
In and on sandstone. A low-temperature, secondary mineral formed by the post-mining weathering of uraninite.
Place of Conservation of Type Material:
In the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 64126, 64127, 64128, 64129 and 64130, and the Fersman Mineralogical Museum of the Russian
Academy of Sciences,
Geological Setting of Type Material:
Sandstone
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Kasatkin, A.V., Čejka, J., Marty, J. (2015) Plášilite, Na(UO2)(SO4)(OH)•2H2O, a new uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA. Journal of Geosciences: 60: 1-10.

Synonyms of PlášiliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Plášilite associated with Mudstone
2 photos of Plášilite associated with NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
2 photos of Plášilite associated with Sandstone
1 photo of Plášilite associated with JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
1 photo of Plášilite associated with ChalcanthiteCuSO4 · 5H2O

Related Minerals - Strunz-mindat GroupingHide

7.EC.AdolfpateraiteK(UO2)(SO4)(OH)(H2O)Mon. 2/m : P21/b
7.EC.Beshtauite(NH4)2(UO2)(SO4)2 · 2H2OMon. 2/m : P21/b
7.EC.SeaborgiteLiK2Na6(UO2)(SO4)5(SO3OH)(H2O)Tric. 1 : P1
7.EC.Nitscheite(NH4)2[(UO2)2(SO4)3(H2O)2] · 3H2OMon. 2/m
7.EC.OldsiteK2Fe2+[(UO2)(SO4)2]2(H2O)8Orth. mm2 : Pmn21
7.EC.Libbyite(NH4)2(Na2◻)[(UO2)2(SO4)3(H2O)]2 · 7H2OTet. 4 2 2 : P41 21 2
7.EC.05CobaltzippeiteCo(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05NickelzippeiteNi2(UO2)6(SO4)3(OH)10 · 16H2O Mon.
7.EC.05NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2OMon. 2/m : P21/m
7.EC.05ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2OMon. 2/m : B2/m
7.EC.05ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2OMon. 2 : B2
7.EC.05PlavnoiteK0.8Mn0.6[(UO2)2O2(SO4)] · 3.5H2OMon. 2/m : B2/m
7.EC.05Redcanyonite(NH4)2Mn[(UO2)4O4(SO4)2](H2O)4Mon. 2/m : B2/m
7.EC.05Ammoniozippeite(NH4)2[(UO2)2(SO4)O2] · H2OOrth. mmm (2/m 2/m 2/m)
7.EC.10RabejaciteCa(UO2)4(SO4)2(OH)6 · 6H2OTric. 1 : P1
7.EC.10SvornostiteK2Mg[(UO2)(SO4)2]2 · 8H2OOrth. mm2 : Pmn21
7.EC.15MarécottiteMg3(UO2)8(SO4)4O6(OH)2 · 28H2OTric. 1 : P1
7.EC.15Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2OTric. 1 : P1
7.EC.20PseudojohanniteCu3(OH)2[(UO2)4(SO4)2] · 12H2OTric. 1 : P1
7.EC.40BluelizarditeNa7(UO2)(SO4)4Cl(H2O)2Mon. 2/m : B2/b
7.EC.45MeisseriteNa5(UO2)(SO4)3(SO3OH)(H2O)Tric. 1 : P1
7.EC.45FermiiteNa4(UO2)(SO4)3 · 3H2OOrth. mm2 : Pmn21
7.EC.45OppenheimeriteNa2(UO2)(SO4)2 · 3H2OTric. 1 : P1
7.EC.50FeynmaniteNa(UO2)(SO4)(OH) · 3.5H2OMon.
7.EC.55GeschieberiteK2(UO2)(SO4)2 · 2H2OOrth. mm2 : Pna21
7.EC.60OttohahniteNa6(UO2)2(SO4)5(H2O)7 · 1.5H2OTric. 1 : P1
7.EC.65PéligotiteNa6(UO2)(SO4)4 · 4H2OTric. 1 : P1
7.EC.70KlaprothiteNa6(UO2)(SO4)4 · 4H2OMon. 2/m : P21/b
7.EC.75Lussierite Na10[(UO2)(SO4)4](SO4)2 · 3(H2O)Mon. m : Bb
7.EC.80NavrotskyiteK2Na10(UO2)3(SO4)9 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
7.EC.85Pseudomeisserite-(NH4)(NH4)2Na4[(UO2)2(SO4)5] · 4H2OMon. 2/m : P21/b
7.EC.90WetherilliteNa2Mg(UO2)2(SO4)4 · 18H2OMon. 2/m : P21/b

Fluorescence of PlášiliteHide

Fluoresces bluish white under both long-wave and short-wave UV

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.

Internet Links for PlášiliteHide

References for PlášiliteHide

Localities for PlášiliteHide

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 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Utah
    • San Juan County
      • Red Canyon Mining District
Mineralogical Magazine +3 other references
Kampf et al. (2017)
Kampf et al. (2018)
      • White Canyon Mining District
        • Fry Mesa
Collection of Alex Earl
 
Mineral and/or Locality  
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