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Nováčekite

A valid IMA mineral species - grandfathered
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About NováčekiteHide

01680440017083402112912.jpg
Radim Nováček
Formula:
Mg(UO2)2(AsO4)2 · 10H2O
Colour:
Pale yellow, yellow
Lustre:
Resinous, Waxy
Hardness:
2 - 2½
Specific Gravity:
3.25 - 3.70
Crystal System:
Monoclinic
Member of:
Name:
Named nováčekite in 1951 by Clifford Frondel in honor of Radim Nováček [March 21, 1905 Ústí Nad Orlicí, Bohemia, Austria-Hungary - February 12, 1942 Mauthausen, Austria] mineralogist and analytical chemist, Charles University, Prague, Czech Republic. It was renamed to nováčekite-II with the Roman numerals indicating hydration/dehydration stages (Walenta 1964) and the diacritical marks were added in 2008 (Burke). Renamed to nováčekite (with diacritics and without Roman numerals) in 2022.
Isostructural with:
Chemically similar to metanováčekite (the lower hydrate), hydronováčekite (the higher hydrate) and seelite (an arsenite/arsenate).

Note: Hydronováčekite is very unstable under ambient conditions and quickly dehydrates to nováčekite, in part also to metanováčekite.
Nováčekite may also reversibly rehydrate from metanováčekite under ambient conditions.


Unique IdentifiersHide

Mindat ID:
39584
Long-form identifier:
mindat:1:1:39584:3
GUID
(UUID V4):
1151e734-1b38-46aa-b71f-ee079d2c4fd3

IMA Classification of NováčekiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
First published:
1951

Classification of NováčekiteHide

8.EB.05

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1

Mineral SymbolsHide

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

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

Physical Properties of NováčekiteHide

Resinous, Waxy
Transparency:
Translucent
Colour:
Pale yellow, yellow
Streak:
Very pale yellow
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Waxy
Cleavage:
Perfect
{001}
Fracture:
Micaceous
Density:
3.25 - 3.70 g/cm3 (Measured)    3.27 g/cm3 (Calculated)

Optical Data of NováčekiteHide

Type:
Biaxial (-)
RI values:
nα = 1.543 nβ = 1.570 nγ = 1.577 nω = 1.578 nε = 1.548
Birefringence:
0.032
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r>v, strong
Pleochroism:
Visible
Comments:
X = nearly colorless, Y = Z = pale yellow to pale yellow green

Chemistry of NováčekiteHide

Mindat Formula:
Mg(UO2)2(AsO4)2 · 10H2O

Crystallography of NováčekiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 7.1328(11) Å, b = 20.085(3) Å, c = 7.1569(11) Å
β = 90.585(3)°
Ratio:
a:b:c = 0.355 : 1 : 0.356
Unit Cell V:
1,025.26 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Square tablets
Comment:
Space group P21/n; pseudotetragonal (pseudo-space group P42/n, a = 7.18-7.20 A, c = 20.16-20.22 A, Z = 2).

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.2 Å(100)
6.80 Å(40)
5.06 Å(80)
3.58 Å(90)
3.35 Å(50)
2.52 Å(30)
2.26 Å(30)

Geological EnvironmentHide

Synonyms of NováčekiteHide

Relationship of Nováčekite to other SpeciesHide

Member of:
Other Members of this group:
AutuniteCa(UO2)2(PO4)2 · 10-12H2OOrth. mmm (2/m 2/m 2/m) : Pnma
BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m : P2/b
HydronováčekiteMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m
TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
UranospiniteCa(UO2)2(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Common AssociatesHide

Associated Minerals Based on Photo Data:
9 photos of Nováčekite associated with SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2O
6 photos of Nováčekite associated with TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
5 photos of Nováčekite associated with AragoniteCaCO3
3 photos of Nováčekite associated with CalciteCaCO3
3 photos of Nováčekite associated with HematiteFe2O3
3 photos of Nováčekite associated with GypsumCaSO4 · 2H2O
3 photos of Nováčekite associated with ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
2 photos of Nováčekite associated with MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2O
2 photos of Nováčekite associated with UranospiniteCa(UO2)2(AsO4)2 · 10H2O
2 photos of Nováčekite associated with Uranotungstite(Ba0.35Pb0.27)Σ0.62[(U6+O2)2(W6+0.98Fe3+0.260.75)O4.7(OH)2.5(H2O)1.75](H2O)1.67

Related Minerals - Strunz-mindat GroupingHide

8.EB.Meta-autunite GroupA1-2(UO2)2(TO4)2 · 5-10H2O
8.EB.05AutuniteCa(UO2)2(PO4)2 · 10-12H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.EB.05HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m : P2/b
8.EB.05KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
8.EB.05HydronováčekiteMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
8.EB.05SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.05TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
8.EB.05UranospiniteCa(UO2)2(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.05Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.
8.EB.05ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05MetarauchiteNi(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.05RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
8.EB.10BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.10LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon. 2/m
8.EB.10Meta-autuniteCa(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m)
8.EB.10MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
8.EB.10MetauranocirciteBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
8.EB.10MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OMon. 2 : P21
8.EB.10MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OTet.
8.EB.10Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
8.EB.10MetanatroautuniteNa(UO2)(PO4)(H2O)3Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
8.EB.15AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
8.EB.15Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15NatrouranospiniteNa2(UO2)2(AsO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Trögerite(H3O)(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
8.EB.15Uramarsite(NH4)(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
8.EB.20ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
8.EB.20ChistyakovaiteAl(UO2)2(AsO4)2(F,OH) · 6.5H2OMon.
8.EB.25ArsenuranospathiteAl(UO2)2(AsO4)2F · 20H2OOrth. mm2 : Pnn2
8.EB.25Uranospathite(Al,◻)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
8.EB.30Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.
8.EB.35CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
8.EB.40RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
8.EB.45TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
8.EB.50FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
8.EB.55SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
8.EB.60Horákite(Bi7O7OH)[(UO2)4(PO4)2(AsO4)2(OH)2] · 3.5H2OMon. 2/m : B2/b

Fluorescence of NováčekiteHide

Fluoresces dull green to bright lemon yellow in both LW and SW.

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 NováčekiteHide

References for NováčekiteHide

Localities for NováčekiteHide

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.
Austria
 
  • Salzburg
    • Zell am See District
      • Rauris
Strasser (1989)
Strasser (1989)
Brazil
 
  • Bahia
    • Brumado
      • Serra das Éguas
King (n.d.)
Czech Republic
 
  • Karlovy Vary Region
    • Sokolov District
      • Horní Slavkov
70 (in German) +1 other reference
  • Ústí nad Labem Region
    • Chomutov District
      • Měděnec
Hyrsl et al. (2009)
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Savoie
      • Bonneville
        • Vallorcine
Meisser (2012)
  • Occitanie
    • Hérault
      • Lodève
        • Le Puech
Bariand et al. (1993) +1 other reference
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
90 +3 other references
        • Seelbach
          • Seelbach
            • Weiler
Walenta et al. (1961) +1 other reference
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Plaka
            • Paliokamariza Mines (Paleokamariza Mines)
Rieck et al. (2018) +1 other reference
Italy
 
  • Piedmont
    • Cuneo Province
      • Bagnolo Piemonte
Marello et al. (2013)
Marello et al. (2013)
Mexico
 
  • Chihuahua
    • Aldama Municipality
      • Sierra Gomez
Megaw (2023)
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Amerzgane Cercle
        • Ouisselsate Caïdat
Favreau et al. (2007)
Favreau et al. (2019)
    • Zagora Province
      • Agdz Cercle
        • Tansifte Caïdat
          • Tamdrost
Favreau et al. (2007)
Poland
 
  • Lower Silesian Voivodeship
    • Karkonosze County
      • Kowary
        • Podgórze
Syczewski et al. (2023)
Romania
 
  • Suceava County
Hîrtopanu P. et al. (2004)
Russia
 
  • Adygea (Republic of Adygea)
    • Maykopsky District
Pekov I.V. et al. (2010)
Switzerland
 
  • Valais
    • Sierre
      • Anniviers
        • Saint-Luc
Ansermet (2012)
UK
 
  • Scotland
    • Dumfries and Galloway
Livingstone (1993)
USA
 
  • Alaska
    • Prince of Wales-Hyder Census Area
      • Ketchikan Mining District
        • Prince of Wales Island
          • Bokan Mountain
Dostal (2023)
  • Texas
    • Oldham County
Page +3 other references
  • Utah
    • San Juan County
      • Red Canyon Mining District
Collected and analyzed by Joy Desor.
 
Mineral and/or Locality  
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