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Svornostite

A valid IMA mineral species
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09559380014963052774134.jpg
Jáchymov, Svornost Mine

Svornost Mine, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
Formula:
K2Mg[(UO2)(SO4)2]2 · 8H2O
Colour:
Light yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.268 (Calculated)
Crystal System:
Orthorhombic
Name:
Name after the type locality, the Svornost mine.
A low-temperature, supergene mineral formed by the post-mining weathering of uraninite.

The Mg analogue of oldsite.


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Unique IdentifiersHide

Mindat ID:
46524
Long-form identifier:
mindat:1:1:46524:9
GUID
(UUID V4):
da6c5a6c-24f2-4f12-85bb-005f66b0cc01

IMA Classification of SvornostiteHide

IMA status:
Approved
Approval year:
2014
First published:
2015

Classification of SvornostiteHide

Strunz-mindat (2024):
7.EC.10

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

Physical Properties of SvornostiteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Comment:
Strong vitreous lustre
Colour:
Light yellow
Streak:
Pale yellow
Hardness:
2 on Mohs scale
Comment:
~2
Tenacity:
Brittle
Cleavage:
Perfect
on {100} and {010}.
Fracture:
Irregular/Uneven
Density:
3.268 g/cm3 (Calculated)

Optical Data of SvornostiteHide

Type:
Biaxial (+)
RI values:
nα = 1.548(2) nγ = 1.585(2)
Warning: number_format() expects parameter 1 to be float, string given in /home/mindat/www/show_class.php on line 4387
2V:
Calculated: 56°
Birefringence:
0.037
Max Birefringence:
δ = 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
None observed
Pleochroism:
Non-pleochroic
Comments:
None observed
Comments:
The optical orientation is Z = c

Chemistry of SvornostiteHide

Mindat Formula:
K2Mg[(UO2)(SO4)2]2 · 8H2O
Elements listed:
H, K, Mg, O, S, U - search for minerals with similar chemistry

Crystallography of SvornostiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmn21
Cell Parameters:
a = 12.7850(3) Å, b = 8.2683(4) Å, c = 11.2163(3) Å
Ratio:
a:b:c = 1.546 : 1 : 1.357
Unit Cell V:
1185.68 ų
Z:
2
Morphology:
Crystals are long prisms elongated on [001] and flattened on {100}. Crystals exhibit the forms {100}, {010} and {011}, usually forming multiple intergrowths. crusts

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.279 Å(50)
6.398 Å(100)
5.060 Å(55)
4.645 Å(40)
4.610 Å(38)
3.881 Å(34)
3.318 Å(44)
3.009 Å(44)
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]

Type Occurrence of SvornostiteHide

Type Locality:
ⓘ Geschieber vein, Svornost Mine, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
General Appearance of Type Material:
Crystalline crusts consisting of yellow prismatic crystals.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4537/1
Associated Minerals at Type Locality:
GypsumGeschieberiteAdolfpateraite

Synonyms of SvornostiteHide

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.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.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 SvornostiteHide

In UV light:
Strong yellowish-green fluorescence 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 SvornostiteHide

References for SvornostiteHide

Localities for SvornostiteHide

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
        • Svornost Mine
Mineralogical Magazine +2 other references
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