Nováčekite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Nováčekite
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.
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.
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 Identifiers
Mindat ID:
39584
Long-form identifier:
mindat:1:1:39584:3
GUID
(UUID V4):
(UUID V4):
1151e734-1b38-46aa-b71f-ee079d2c4fd3
IMA Classification of Nováčekite
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
First published:
1951
Classification of Nováčekite
8.EB.05
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Nvč-II | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Nováčekite
Resinous, Waxy
Transparency:
Translucent
Colour:
Pale yellow, yellow
Streak:
Very pale yellow
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Waxy
Cleavage:
Perfect
{001}
{001}
Fracture:
Micaceous
Density:
3.25 - 3.70 g/cm3 (Measured) 3.27 g/cm3 (Calculated)
Optical Data of Nováčekite
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.
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 Nováčekite
Mindat Formula:
Mg(UO2)2(AsO4)2 · 10H2O
Crystallography of Nováčekite
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)°
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 Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] | |
47f : [Uranyl (U⁶⁺) minerals] |
Synonyms of Nováčekite
Relationship of Nováčekite to other Species
Member of:
Other Members of this group:
Autunite | Ca(UO2)2(PO4)2 · 10-12H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O | Mon. 2/m |
Heinrichite | Ba(UO2)2(AsO4)2 · 10H2O | Mon. 2/m : P2/b |
Hydronováčekite | Mg(UO2)2(AsO4)2 · 12H2O | Tric. 1 : P1 |
Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O | Tet. 4/m : P42/n |
Rauchite | Ni(UO2)2(AsO4)2 · 10H2O | Tric. 1 : P1 |
Sabugalite | HAl(UO2)4(PO4)4 · 16H2O | Mon. 2/m : B2/m |
Saléeite | Mg(UO2)2(PO4)2 · 10H2O | Mon. 2/m |
Torbernite | Cu(UO2)2(PO4)2 · 12H2O | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
Uranocircite | Ba(UO2)2(PO4)2 · 10H2O | Tet. |
Uranospinite | Ca(UO2)2(AsO4)2 · 10H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
Common Associates
Associated Minerals Based on Photo Data:
9 photos of Nováčekite associated with Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
6 photos of Nováčekite associated with Tyuyamunite | Ca(UO2)2(VO4)2 · 5-8H2O |
5 photos of Nováčekite associated with Aragonite | CaCO3 |
3 photos of Nováčekite associated with Calcite | CaCO3 |
3 photos of Nováčekite associated with Hematite | Fe2O3 |
3 photos of Nováčekite associated with Gypsum | CaSO4 · 2H2O |
3 photos of Nováčekite associated with Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
2 photos of Nováčekite associated with Maghrebite | MgAl2(AsO4)2(OH)2 · 8H2O |
2 photos of Nováčekite associated with Uranospinite | Ca(UO2)2(AsO4)2 · 10H2O |
2 photos of Nováčekite associated with Uranotungstite | (Ba0.35Pb0.27)Σ0.62[(U6+O2)2(W6+0.98Fe3+0.26◻0.75)O4.7(OH)2.5(H2O)1.75](H2O)1.67 |
Related Minerals - Strunz-mindat Grouping
8.EB. | Meta-autunite Group | A1-2(UO2)2(TO4)2 · 5-10H2O |
8.EB.05 | Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
8.EB.05 | Heinrichite | Ba(UO2)2(AsO4)2 · 10H2O |
8.EB.05 | Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Hydronováčekite | Mg(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
8.EB.05 | Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
8.EB.05 | Uranocircite | Ba(UO2)2(PO4)2 · 10H2O |
8.EB.05 | Uranospinite | Ca(UO2)2(AsO4)2 · 10H2O |
8.EB.05 | Xiangjiangite | (Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O |
8.EB.05 | Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Metarauchite | Ni(UO2)2(AsO4)2 · 8H2O |
8.EB.05 | Rauchite | Ni(UO2)2(AsO4)2 · 10H2O |
8.EB.10 | Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
8.EB.10 | Lehnerite | Mn2+(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
8.EB.10 | Metasaléeite | Mg(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Metauranocircite | Ba(UO2)2(PO4)2 · 7H2O |
8.EB.10 | Metauranospinite | Ca(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metaheinrichite | Ba(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metakahlerite | Fe2+(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metakirchheimerite | Co(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metanováčekite | Mg(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Metazeunerite | Cu(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Przhevalskite | Pb2(UO2)3(PO4)2(OH)4 · 3H2O |
8.EB.10 | Pseudo-autunite | (H3O)4Ca2(UO2)2(PO4)4 · 5H2O |
8.EB.10 | Metanatroautunite | Na(UO2)(PO4)(H2O)3 |
8.EB.15 | Abernathyite | K(UO2)(AsO4) · 3H2O |
8.EB.15 | Chernikovite | (H3O)2(UO2)2(PO4)2 · 6H2O |
8.EB.15 | Meta-ankoleite | K2(UO2)2(PO4)2 · 6H2O |
8.EB.15 | Natrouranospinite | Na2(UO2)2(AsO4)2 · 5H2O |
8.EB.15 | Trögerite | (H3O)(UO2)(AsO4) · 3H2O |
8.EB.15 | Uramphite | (NH4)2(UO2)2(PO4)2 · 6H2O |
8.EB.15 | Uramarsite | (NH4)(UO2)(AsO4) · 3H2O |
8.EB.20 | Threadgoldite | Al(UO2)2(PO4)2(OH) · 8H2O |
8.EB.20 | Chistyakovaite | Al(UO2)2(AsO4)2(F,OH) · 6.5H2O |
8.EB.25 | Arsenuranospathite | Al(UO2)2(AsO4)2F · 20H2O |
8.EB.25 | Uranospathite | (Al,◻)(UO2)2(PO4)2F · 20(H2O,F) |
8.EB.30 | Vochtenite | (Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O |
8.EB.35 | Coconinoite | Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O |
8.EB.40 | Ranunculite | HAl(UO2)(PO4)(OH)3 · 4H2O |
8.EB.45 | Triangulite | Al3(UO2)4(PO4)4(OH)5 · 5H2O |
8.EB.50 | Furongite | Al13(UO2)7(PO4)13(OH)14 · 58H2O |
8.EB.55 | Sabugalite | HAl(UO2)4(PO4)4 · 16H2O |
8.EB.60 | Horákite | (Bi7O7OH)[(UO2)4(PO4)2(AsO4)2(OH)2] · 3.5H2O |
Fluorescence of Nováčekite
Fluoresces dull green to bright lemon yellow in both LW and SW.
Other Information
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 Nováčekite
mindat.org URL:
https://www.mindat.org/min-39584.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Nováčekite
Reference List:
Locock, A. J., Burns, P. C., Flynn, T. M. (2004) Divalent transition metals and magnesium in structures that contain the autunite-type sheet. The Canadian Mineralogist, 42 (6) 1699-1718 doi:10.2113/gscanmin.42.6.1699
Burke, Ernst A. J. (2008) Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks. The Mineralogical Record, 39 (2) 131-135
Localities for Nováčekite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Austria | |
| Strasser (1989) |
Strasser (1989) | |
Brazil | |
| King (n.d.) |
Czech Republic | |
| 70 (in German) +1 other reference |
| Hyrsl et al. (2009) |
France | |
| Meisser (2012) |
| Bariand et al. (1993) +1 other reference |
Germany | |
| 90 +3 other references |
| Walenta et al. (1961) +1 other reference |
Greece | |
| Rieck et al. (2018) +1 other reference |
Italy | |
| Marello et al. (2013) |
Marello et al. (2013) | |
Mexico | |
| Megaw (2023) |
Morocco | |
| Favreau et al. (2007) |
Favreau et al. (2019) | |
| Favreau et al. (2007) |
Poland | |
| Syczewski et al. (2023) |
Romania | |
| Hîrtopanu P. et al. (2004) |
Russia | |
| Pekov I.V. et al. (2010) |
Switzerland | |
| Ansermet (2012) |
UK | |
| Livingstone (1993) |
USA | |
| Dostal (2023) |
| Page +3 other references |
| Collected and analyzed by Joy Desor. |
Quick NavTopAbout NováčekiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentSynonymsRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy