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Nováčekite-I

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Big Photo

Pomba pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Brazil
© Joseph A. Freilich

Show Nováčekite-I Photos (28)



Formula:
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
System:TriclinicColour:Light yellow
Hardness:2½
Member of:Autunite Group


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 = nováčekite-I), the other with 10 water molecules (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); 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.


Classification of Nováčekite-I

IMA status:Approved
Strunz 8th edition ID:7/E.01-40
Nickel-Strunz 10th (pending) edition ID:8.EB.05

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
Dana 8th edition ID:40.2a.10.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
Hey's CIM Ref.:20.7.7

20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
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Type Occurrence of Nováčekite-I

Type Locality:Walpurgis Flacher vein, Weißer Hirsch Mine (Shaft 3), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Physical Properties of Nováčekite-I

Lustre:Vitreous
Colour:Light yellow
Streak:White, yellow
Hardness (Mohs):2½

Crystallography of Nováčekite-I

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.1594Å, b = 7.161Å, c = 11.3146Å
α = 81.391°, β = 81.177°, γ = 88.884°
Ratio:a:b:c = 1 : 1 : 1.58
Unit Cell Volume:V 566.76 ų (Calculated from Unit Cell)
Comment:Pseudo-tetragonal (long axis ~22 A).
X-Ray Powder Diffraction:
d-spacingIntensity
10.2 (10)
6.80 (4)
5.06 (8)
3.58 (9)
3.35 (5)
2.52 (3)
2.26 (3)

Optical Data of Nováčekite-I

Type:Uniaxial (-)
RI values: nω = 1.620 - 1.641 nε = 1.620 - 1.625
Maximum Birefringence:δ = 0.000 - 0.016

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Comments:Symmetry requires pseudo-uniaxial optical character.

Chemical Properties of Nováčekite-I

Formula:
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
Essential elements:As, H, Mg, O, U
All elements listed in formula:As, H, Mg, O, U

Relationship of Nováčekite-I to other Species

Member of:Autunite Group
Other Members of Group:

- +
Autunite
Ca(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 11H
 
2
O
Heinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
Kahlerite
Fe(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
Metarauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
Rauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
Sabugalite
HAl(UO
 
2
)
 
4
(PO
 
4
)
 
4
 · 16H
 
2
O
Saléeite
Mg(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 10H
 
2
O
Torbernite
Cu(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 12H
 
2
O
Uranocircite
Ba(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 10H
 
2
O
Uranospinite
Ca(UO
 
2
)(AsO
 
4
)
 
2
 · 10H
 
2
O
Zeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.EB.05Autunite
Ca(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 11H
 
2
O
8.EB.05Heinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
8.EB.05Kahlerite
Fe(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
8.EB.05Saléeite
Mg(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 10H
 
2
O
8.EB.05Torbernite
Cu(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 12H
 
2
O
8.EB.05Uranocircite
Ba(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 10H
 
2
O
8.EB.05Uranospinite
Ca(UO
 
2
)(AsO
 
4
)
 
2
 · 10H
 
2
O
8.EB.05Xiangjiangite
(Fe
3+
 
,Al)(UO
 
2
)
 
4
(PO
 
4
)
 
2
(SO
 
4
)
 
2
(OH) · 22H
 
2
O
8.EB.05Zeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
8.EB.05Metarauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.05Rauchite
Ni(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
8.EB.10Bassetite
Fe
2+
 
(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Lehnerite
Mn
2+
 
(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Meta-autunite
Ca(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 6-8H
 
2
O
8.EB.10Metasaléeite
Mg(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metauranocircite
Ba(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 7H
 
2
O
8.EB.10Metauranospinite
Ca(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metaheinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metakahlerite
Fe
2+
 
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metakirchheimerite
Co(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metanováčekite
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 4-8H
 
2
O
8.EB.10Metatorbernite
Cu(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Metazeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.EB.10Przhevalskite
Pb
 
2
(UO
 
2
)
 
3
(PO
 
4
)
 
2
(OH)
 
4
 · 3H
 
2
O
8.EB.10Meta-lodèvite
8.EB.15Abernathyite
K
 
2
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 6H
 
2
O
8.EB.15Chernikovite
(H
 
3
O)
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 6H
 
2
O
8.EB.15Meta-ankoleite
K
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 6H
 
2
O
8.EB.15Natrouranospinite
(Na
 
2
,Ca)(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 5H
 
2
O
8.EB.15Trögerite
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
 · 12H
 
2
O (?)
8.EB.15Uramphite
(NH
 
4
)
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
2
 · 6H
 
2
O
8.EB.15Uramarsite
(NH
 
4
,H
 
3
O)
 
2
(UO
 
2
)
 
2
(AsO
 
4
,PO
 
4
)
 
2
 · 6H
 
2
O
8.EB.20Threadgoldite
Al(UO
 
2
)
 
2
(PO
 
4
)
 
2
(OH) · 8H
 
2
O
8.EB.20Chistyakovaite
Al(UO
 
2
)
 
2
(AsO
 
4
)
 
2
(F,OH) · 6.5H
 
2
O
8.EB.25Arsenuranospathite
HAl(UO
 
2
)
 
4
(AsO
 
4
)
 
4
 · 40H
 
2
O
8.EB.25Uranospathite
(Al,☐)(UO
 
2
)
 
2
(PO
 
4
)
 
2
F · 20(H
 
2
O,F)
8.EB.30Vochtenite
(Fe
2+
 
,Mg)Fe
3+
 
(UO
 
2
)
 
4
(PO
 
4
)
 
4
(OH) · 12-13H
 
2
O
8.EB.35Coconinoite
Fe
3+
2
Al
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
4
(SO
 
4
)(OH)
 
2
 · 20H
 
2
O
8.EB.40Ranunculite
HAl(UO
 
2
)(PO
 
4
)(OH)
 
3
 · 4H
 
2
O
8.EB.45Triangulite
Al
 
3
(UO
 
2
)
 
4
(PO
 
4
)
 
4
(OH)
 
5
 · 5H
 
2
O
8.EB.50Furongite
Al
 
13
(UO
 
2
)
 
7
(PO
 
4
)
 
13
(OH)
 
14
 · 58H
 
2
O
8.EB.55Sabugalite
HAl(UO
 
2
)
 
4
(PO
 
4
)
 
4
 · 16H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.7.1Trögerite
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
 · 12H
 
2
O (?)
20.7.2Natrouranospinite
(Na
 
2
,Ca)(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 5H
 
2
O
20.7.3Abernathyite
K
 
2
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 6H
 
2
O
20.7.4Metazeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.7.5Zeunerite
Cu(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
20.7.6Metanováčekite
Mg(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 4-8H
 
2
O
20.7.8Arsenuranylite
Ca(UO
 
2
)
 
4
(AsO
 
4
)
 
2
(OH)
 
4
 · 6H
 
2
O
20.7.9Metauranospinite
Ca(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.7.10Uranospinite
Ca(UO
 
2
)(AsO
 
4
)
 
2
 · 10H
 
2
O
20.7.11Metaheinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.7.12Heinrichite
Ba(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
20.7.13Metalodèvite
Zn(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 10H
 
2
O
20.7.14Arsenuranospathite
HAl(UO
 
2
)
 
4
(AsO
 
4
)
 
4
 · 40H
 
2
O
20.7.15Hallimondite
Pb
 
2
(UO
 
2
)(AsO
 
4
)
 
2
 · nH
 
2
O, 0 ≤ n ≤ 0.5
20.7.16Hügelite
Pb
 
2
(UO
 
2
)
 
3
(AsO
 
4
)
 
2
O
 
2
 · 5H
 
2
O
20.7.17Asselbornite
Pb(BiO)
 
3
(UO
 
2
)
 
4
(AsO
 
4
)
 
2
(OH)
 
7
·4H
 
2
O
20.7.18Metakahlerite
Fe
2+
 
(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.7.19Kahlerite
Fe(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 12H
 
2
O
20.7.20Metakirchheimerite
Co(UO
 
2
)
 
2
(AsO
 
4
)
 
2
 · 8H
 
2
O

Other Names for Nováčekite-I

Other Languages:
German:Nováčekit
Novacikit
Spanish:Nováčekita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Nováčekite-I

Reference List:

- +
American Mineralogist (1951): 36: 680-686.

Walenta, K. & Wimmenauer, W. (1961): Der Mineralbestand des Michaelganges im Weiler bei Lahr (Schwarzwald). Jh. Geol. Landesamt Baden-Württemberg, 4, 7-37.

Walenta, K. (1964): Rare arsenate minerals with special consideration of occurrences in the Black Forest. Mineral. Petrog. Mitt. 9, 111-174. (in German).

Mineralogical Magazine (1994): 58: 513.

Locock, A. J., Burns, P. C. & Flynn, T. M. (2004): Divalent transition metals and magnesium in structures that contain the autunite-type sheet. Canadian Mineralogist 42, 1699-1718.

Internet Links for Nováčekite-I

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    • Localities for Nováčekite-I

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Salzburg
      • Hohe Tauern
        • Rauris valley
          • Hüttwinkl valley
    		A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
    A. Strasser: Die Minerale Salzburgs (1989)
          • Seidlwinkl valley
    		A. Strasser: Die Minerale Salzburgs (1989)
    Brazil
     
    • Bahia
      • Brumado (Bom Jesus dos Meiras)
        • Serra das Éguas
    		Cassedanne, J.P. & Cassedanne, J.O. (1978): Famous mineral localities: The Brumado district, Bahia , Brazil. Mineralogical Record 9 : 196-205
    No reference listed
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Plašil J, Sejkora J, Ondruš P, Veselovský F, Beran P, Goliáš V (2006): Supergene minerals in the Horní Slavkov uranium ore district, Czech Republic. Journal of the Czech Geological Society 51, 149-158.
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov (St Joachimsthal) District
    		Lapis 2002(7/8), 63-65
            • Přebuz (Frühbuß) District
              • Přebuz (Frühbuß)
    		Rojík, P. (2006): J. Czech Geol. Soc. 50 (3-4), 157-165.
    Rojík, P. (2006): J. Czech Geol. Soc. 50 (3-4), 157-165.
      • Ústí Region
        • Krušné Hory Mts (Erzgebirge)
          • Klášterec nad Ohří
    		No reference listed
    • Moravia (Mähren; Maehren)
      • Olomouc Region
        • Javorník (Jauernig)
    		Sejkora, J.: Uranové ložisko Zálesí v Rychlebských horách. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 105-110.
    France
     
    • Burgundy
      • Saône-et-Loire
        • Gueugnon
          • Neuvy-Grandchamp
    		Vajdak, Josef (2006) Mineral News: 22: 11.
    • Languedoc-Roussillon
      • Hérault
        • Lodève
    		Le Règne Minéral, Hors Série IV (1998)
    [Le Cahier des Micromonteurs, 1998, 2, p.13-26]
    [Le Règne Minéral 1997, 13, p.5-18]
    Le Règne Minéral, Hors Série IV (1998)
    • Rhône-Alpes
      • Savoie
        • Vanoise
    		Le Règne Minéral, Hors Série IV, 1998
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Baden-Baden
    		No reference listed
        • Lahr
          • Reichenbach
            • Weiler
    		Walenta, K. & Wimmenauer, W. (1961): Der Mineralbestand des Michaelganges im Weiler bei Lahr (Schwarzwald). Jh. Geol. Landesamt Baden-Württemberg, 4, 7-37. (in German); Wittern: "Mineralfundorte in Deutschland", 2001
        • Menzenschwand
    		Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schenkenzell
          • Wittichen
            • Burgfelsen
    		American Mineralogist: 76: 2021.
            • Heubach Valley
    		No reference listed
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schiltach
          • Stammelbach valley
    		[Lapis 1992, 11, p.13-20]
        • Schramberg
          • Falkenstein valley
    		No reference listed
        • St Ulrich
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • North Rhine-Westphalia
      • Siegerland
        • Müsen
    		Der Aufschluss 2000(2), 71-123
    • Rhineland-Palatinate
      • Hunsrück
        • Birkenfeld
          • Ellweiler
    		Aufschluss 69/(7+8), Lapis 79/(7+8)
      • Palatinate
        • Winnweiler
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Saxony
      • Erzgebirge
        • Ehrenfriedersdorf
          • Geyer
    		Wittern: "Mineralfundorte in Deutschland", 2001
        • Johanngeorgenstadt District
    		Gröbner, J., Grimm, O. & Zienau, H. (2005): Neufunde interessanter Wismut- und Uranmineralien am Schaarschacht, Johanngeorgenstadt, Sachsen. Lapis 30 (6), 44-51; 62.
        • Schneeberg District
          • Neustädtel
            • Weißer Hirsch Mine (Shaft 3)
    		Amer.Min.(1951) 36, 680-686
        • Schwarzenberg District
    		J. Gröbner und U. Kolitsch (2006): Neufunde aus dem Erzgebirge (II). Mineralien-Welt 17 (3), 22-27.
    • Thuringia
      • Gera
        • Ronneburg U deposit
    		T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
    Italy
     
    • Trentino-Alto Adige
      • Trento Province
        • Daone
          • Limes
    		Campostrini, I., Demartin, F., Gramaccioli, C.M. (2005): Val Daone. Minerali secondari del giacimento uranifero presso Limes, Daone (TN). Rivista Mineralogica Italiana, 4/2005, 228-240.
    Mexico
     
    • Chihuahua
      • Mun. de Aldama
        • Puerto del Aire
    		Panczner (1987): 284.
      • Mun. de Aquiles Serdán
        • Santa Eulalia District
          • West Camp
            • Francisco Portillo
    		Panczner(1987):220 & 284.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Bou Azer
    		Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
            • Tamdrost
    		Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    South Africa
     
    • Western Cape Province
      • Central Karoo District
    		Minerals of South Africa
    Switzerland
     
    • Wallis (Valais)
      • Le Trient Valley
        • Les Marécottes
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 289.
    UK
     
    • England
      • Cornwall
        • St Just District
          • St Just
            • Botallack
    		Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
    USA
     
    • Alaska
      • Prince of Wales-Outer Ketchikan Borough
        • Ketchikan District
          • Prince of Wales Island
            • Bokan Mountain
    		U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • Nevada
      • Mineral Co.
        • Fitting District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    • New Mexico
      • Cibola Co.
    		Northrop, Minerals of New Mexico, 3rd. rev. ed. (1996); Am Min 39:675-676
    NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
      • McKinley Co.
    		Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    No reference listed
    • Oklahoma
      • Comanche Co.
    		R&M 72:4 pp 252-264; American Mineralogist 41:152-153
    R&M 72:4 pp 252-264; American Mineralogist 41:152-153
    • Oregon
      • Lake Co.
        • Lakeview
    		Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell
    • Utah
      • San Juan Co.
        • Paradox Valley
          • Paradox Valley District
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    Uzbekistan
     
    • Namangan Viloyati
      • Chatkal-Kuraminskii Range
        • Pap
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