Hydronováčekite
A valid IMA mineral species - grandfathered
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About Hydronováčekite
Radim Nováček
Formula:
Mg(UO2)2(AsO4)2 · 12H2O
Colour:
Light yellow, straw yellow
Lustre:
Vitreous
Hardness:
2½
Crystal System:
Triclinic
Member of:
Name:
Originally named novacekite-I by Kurt Walenta in 1964, to denote a more hydrated species than the previously described novacekite, which he renamed to novacekite-II. The diacritical marks were added in 2008 (Burke). In 2022 the species was renamed from nováčekite-I to hydronováčekite.
The root name honors 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.
The root name honors 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.
Autunite Group.
Note: the use of the name nováčekite is inconsistent in the literature. There are two differently hydrated species (Walenta, 1964), one with 12 water molecules (nováčekite-I), the other with 10 water molecules (nováčekite = nováčekite-II). A further, still less hydrated species is metanováčekite.
Both nováčekite-I and nováčekite-II are grandfathered species. Their crystal structures have been solved by Locock et al. (2004) using synthetic crystals; nováčekite-I is triclinic (P-1), with a 7.1594(5) Å, b 7.1610(5) Å, c 11.3146(7) Å, α 81.391(2)°, β 81.177(1)°, γ 88.884(1)°, while nováčekite-II is monoclinic (P21/n), with a 7.1328(11) Å, b 20.085(3) Å, c 7.1569(11) Å, β 90.585(3)°.
Nováčekite-I is very unstable under ambient conditions and quickly dehydrates to nováčekite-II, in part also to metanováčekite.
Most "nováčekite" specimens in collections seem to be either nováčekite-II or metanováčekite.
Note: the use of the name nováčekite is inconsistent in the literature. There are two differently hydrated species (Walenta, 1964), one with 12 water molecules (nováčekite-I), the other with 10 water molecules (nováčekite = nováčekite-II). A further, still less hydrated species is metanováčekite.
Both nováčekite-I and nováčekite-II are grandfathered species. Their crystal structures have been solved by Locock et al. (2004) using synthetic crystals; nováčekite-I is triclinic (P-1), with a 7.1594(5) Å, b 7.1610(5) Å, c 11.3146(7) Å, α 81.391(2)°, β 81.177(1)°, γ 88.884(1)°, while nováčekite-II is monoclinic (P21/n), with a 7.1328(11) Å, b 20.085(3) Å, c 7.1569(11) Å, β 90.585(3)°.
Nováčekite-I is very unstable under ambient conditions and quickly dehydrates to nováčekite-II, in part also to metanováčekite.
Most "nováčekite" specimens in collections seem to be either nováčekite-II or metanováčekite.
Unique Identifiers
Mindat ID:
2937
Long-form identifier:
mindat:1:1:2937:3
GUID
(UUID V4):
(UUID V4):
46be173a-43e5-451b-ad27-1bd94c03652b
IMA Classification of Hydronováčekite
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
First published:
1964
Classification of Hydronováčekite
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
40.2a.10.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
20.7.7
20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
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-I | 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 Hydronováčekite
Vitreous
Transparency:
Transparent
Colour:
Light yellow, straw yellow
Streak:
White, pale yellow
Hardness:
2½ on Mohs scale
Cleavage:
Perfect
Perfect on {001}, good on {100} and {010}. Less pronounced than the lower hydration levels (i.e. nováčekite and metanováčekite).
Perfect on {001}, good on {100} and {010}. Less pronounced than the lower hydration levels (i.e. nováčekite and metanováčekite).
Optical Data of Hydronováčekite
Type:
Uniaxial (-)
RI values:
nω = 1.620 - 1.641 nε = 1.620 - 1.625
Max Birefringence:
δ = 0.000 - 0.016
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:
Moderate
Comments:
Symmetry requires pseudo-uniaxial optical character.
Chemistry of Hydronováčekite
Mindat Formula:
Mg(UO2)2(AsO4)2 · 12H2O
Crystallography of Hydronováčekite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.1594 Å, b = 7.161 Å, c = 11.3146 Å
α = 81.391°, β = 81.177°, γ = 88.884°
α = 81.391°, β = 81.177°, γ = 88.884°
Ratio:
a:b:c = 1 : 1 : 1.58
Unit Cell V:
566.76 ų (Calculated from Unit Cell)
Comment:
Pseudo-tetragonal (long axis ~22 A).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.2 Å | (10) |
| 6.80 Å | (4) |
| 5.06 Å | (8) |
| 3.58 Å | (9) |
| 3.35 Å | (5) |
| 2.52 Å | (3) |
| 2.26 Å | (3) |
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] |
Type Occurrence of Hydronováčekite
Synonyms of Hydronováčekite
Other Language Names for Hydronováčekite
Spanish:Nováčekita
Relationship of Hydronováčekite 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 |
| Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O | Tet. 4/m : P42/n |
| Nováčekite | Mg(UO2)2(AsO4)2 · 10H2O | Mon. 2/m |
| 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:
| 30 photos of Hydronováčekite associated with Gypsum | CaSO4 · 2H2O |
| 8 photos of Hydronováčekite associated with Erythrite | Co3(AsO4)2 · 8H2O |
| 8 photos of Hydronováčekite associated with Umohoite | (UO2)MoO4 · 2H2O |
| 8 photos of Hydronováčekite associated with Calcite | CaCO3 |
| 6 photos of Hydronováčekite associated with Quartz | SiO2 |
| 5 photos of Hydronováčekite associated with Magnesite | MgCO3 |
| 4 photos of Hydronováčekite associated with Metaschoepite | (UO2)8O2(OH)12 · 10H2O |
| 4 photos of Hydronováčekite associated with Parauranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 3 photos of Hydronováčekite associated with Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
| 3 photos of Hydronováčekite associated with Metaheinrichite | Ba(UO2)2(AsO4)2 · 8H2O |
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 | 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 | Nováčekite | Mg(UO2)2(AsO4)2 · 10H2O |
| 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 |
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 Hydronováčekite
mindat.org URL:
https://www.mindat.org/min-2937.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Hydronováčekite
Reference List:
Frondel, Clifford (1951) Studies of uranium minerals (IX): Saléeite and novacekite. American Mineralogist, 36 (9-10) 680-686
Stern, T. W., Annell, C. S. (1954) A second locality of novacekite. American Mineralogist, 39 (7-8) 675-676
Huang, W. T. (1956) Novacekite from the Wichita Mountains, Oklahoma. American Mineralogist, 41 (1-2) 152-153
Elton, N. J., Hooper, J. J., Jeal, A. E. (1994) Nováčekite and metanováčekite from Cornwall. Mineralogical Magazine, 58 (392) 513-514 doi:10.1180/minmag.1994.058.392.22
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
Localities for Hydronováčekite
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Austria | |
| Strasser (1989) |
| Strasser (1989) | |
Brazil | |
| Cassedanne et al. (1978) |
Czech Republic | |
| Lapis 2002 (7/8) |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Plašil J et al. (2006) | |
| Rojík (2006) |
| Rojík (2006) | |
| Sejkora (1994) |
| |
France | |
| - (1998) |
| Vajdak (2006) |
| - (1998) |
| Caubel (1997) +1 other reference |
| [Le Cahier des Micromonteurs |
| - (1998) | |
Germany | |
| Walenta (1992) |
| Walenta et al. (1961) +1 other reference |
| American Mineralogist: 76: 2021. |
| |
| Walenta (1992) | |
| [Lapis 1992 |
| |
| Walenta (1992) |
| |
| Der Aufschluss 2000 (2) |
| Aufschluss 69/ (7+8) +1 other reference |
| Weiß (1990) |
| Wittern (2001) |
| 62. +1 other reference | |
| Frondel (1951) |
| Gröbner J. et al. (2006) | |
| T. Witzke & F. Rüger: Lapis 1998 (7/8) |
Italy | |
| Campostrini et al. (2005) |
Mexico | |
| Panczner (1987) |
| Panczner (1987) |
Morocco | |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| Favreau et al. (2006) |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
South Africa | |
| Cairncross et al. (1995) |
Switzerland | |
| Stalder et al. (1998) |
UK | |
| Golley et al. (1995) |
USA | |
| - (2008) |
| Castor et al. (2004) |
| Castor et al. (2004) | |
| Am Min 39:675-676 +1 other reference |
| NMBMMR Memoir 15 Geology and Technology ... | |
| Northrop et al. (1996) | |
| |
| R&M 72:4 pp 252-264 +1 other reference |
| R&M 72:4 pp 252-264 +1 other reference |
| Nevada Bureau of Mines and Geology NBMG ... |
| Bullock (1981) |
Uzbekistan | |
| Frost et al. (2009) |
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Schmiedestollen dump, Wittichen, Schenkenzell, Rottweil, Freiburg Region, Baden-Württemberg, Germany