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Geschieberite

A valid IMA mineral species
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About GeschieberiteHide

Formula:
K2(UO2)(SO4)2 · 2H2O
Colour:
Bright green
Hardness:
2
Specific Gravity:
3.259 (Calculated)
Crystal System:
Orthorhombic
Name:
The mineral is named for one of the most important ore veins in Jáchymov – the Geschieber vein.
Known synthetic analogue. A secondary alteration phase after uraninite.


Unique IdentifiersHide

Mindat ID:
46101
Long-form identifier:
mindat:1:1:46101:2
GUID
(UUID V4):
f37fac94-6d67-40dc-9112-7eab9a9116be

IMA Classification of GeschieberiteHide

Approved
Approval year:
2014
First published:
2015

Classification of GeschieberiteHide

7.EC.55

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

Physical Properties of GeschieberiteHide

Transparency:
Transparent, Translucent
Colour:
Bright green
Streak:
Greenish-white
Hardness:
Comment:
~2
Tenacity:
Brittle
Cleavage:
Perfect
on {100}
Fracture:
Irregular/Uneven
Density:
3.259 g/cm3 (Calculated)

Optical Data of GeschieberiteHide

Type:
Biaxial (-)
Optical Extinction:
X = a.

Chemistry of GeschieberiteHide

Mindat Formula:
K2(UO2)(SO4)2 · 2H2O

Crystallography of GeschieberiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pna21
Setting:
Pna21
Cell Parameters:
a = 13.7778(3) Å, b = 7.2709(4) Å, c = 11.5488(2) Å
Ratio:
a:b:c = 1.895 : 1 : 1.588
Unit Cell V:
1156.92 ų
Z:
4
Morphology:
Aggregates composed of multiply intergrown prismatic crystals elongated on [001]. Forms observed are {010} and {001}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020637GeschieberiteNiinisto L, Toivonen J, Valkonen J (1979) Uranyl(VI) compounds. II. The crystal structure of potassium uranyl sulfate dihydrate, K2UO2(SO4)2*2H2O Acta Chemica Scandinavica A33 621-6241979synthetic0293
0020465GeschieberiteAlekseev E V, Suleimanov E V, Chuprunov E V, Marychev M O, Ivanov V A, Fukin G K (2006) Crystal structure and nonlinear optical properties of the K2UO2(SO4)2*2H2O compound at 293 K Crystallography Reports 51 29-332006Synthetic0293
0020741GeschieberitePlasil J, Hlousek J, Kasatkin A V, Skoda R, Novak M, Cejka J (2015) Geschieberite, K2(UO2)(SO4)2(H2O)2, a new uranyl sulfate mineral from Jachymov Mineralogical Magazine 79 205-2162015Svornost mine, Jachymov, Czech Republic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.882 Å(100)
5.622 Å(53)
4.589 Å(12)
4.428 Å(16)
3.681 Å(18)
3.304 Å(15)
3.079 Å(14)
3.006 Å(17)
Comments:
From Type Description.

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 GeschieberiteHide

General Appearance of Type Material:
Crystalline aggregates of bright green colour.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4537/1.
Associated Minerals at Type Locality:

Synonyms of GeschieberiteHide

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.50PlášiliteNa(UO2)(SO4)(OH) · 2H2OMon. 2/m : P21/b
7.EC.50FeynmaniteNa(UO2)(SO4)(OH) · 3.5H2OMon.
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 GeschieberiteHide

Strong yellowish-green fluorescence under both shortwave and longwave UV.

Other InformationHide

Notes:
Slightly soluble in cold 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 GeschieberiteHide

References for GeschieberiteHide

Localities for GeschieberiteHide

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.
Czech Republic (TL)
 
  • Karlovy Vary Region
    • Karlovy Vary District
      • Jáchymov
Williams et al. (2014) +2 other references
 
Mineral and/or Locality  
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