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Čejkaite

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Eureka mine, Castell-estaó, La Plana de Mont-ros, La Torre de Cabdella, El Pallars Jussà, Lleida (Lérida), Catalonia, Spain
© Rafa Muñoz Alvarado

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Formula:
Na
 
4
(UO
 
2
)(CO
 
3
)
 
3
System:TriclinicColour:pale yellow to beige
Name:In honour of Dr. Jiří Čejka (born 1929), Czech mineralogist, former Director, National Museum, Prague, Czech Republic, now retired (2009). Dr. Čejka specialized in spectrography and the study of uranium minerals.
This page provides mineralogical data about Čejkaite.

Classification of Čejkaite

IMA status:Approved
Strunz 8th edition ID:5/0.0-
Nickel-Strunz 10th (pending) edition ID:5.ED.50

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
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Type Occurrence of Čejkaite

Type Locality:Jáchymov (St Joachimsthal), Jáchymov (St Joachimsthal) District, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Physical Properties of Čejkaite

Lustre:Vitreous
Colour:pale yellow to beige
Streak:light yellow
Density (measured):3.67 g/cm3
Density (calculated):3.766 g/cm3

Crystallography of Čejkaite

Crystal System:Triclinic
Cell Parameters:a = 9.291Å, b = 9.292Å, c = 12.895Å
α = 90.73°, β = 90.82°, γ = 120°
Ratio:a:b:c = 1 : 1 : 1.388
Unit Cell Volume:V 963.7 ų
Z:4

Chemical Properties of Čejkaite

Formula:
Na
 
4
(UO
 
2
)(CO
 
3
)
 
3
Essential elements:C, Na, O, U
All elements listed in formula:C, Na, O, U

Relationship of Čejkaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.ED.05Bayleyite
Mg
 
2
(UO
 
2
)(CO
 
3
)
 
3
 · 18H
 
2
O
5.ED.10Swartzite
MgCa(UO
 
2
)(CO
 
3
)
 
3
 · 12H
 
2
O
5.ED.15Albrechtschraufite
Ca
 
4
Mg(UO
 
2
)
 
2
(CO
 
3
)
 
6
F
 
2
 · 17 H
 
2
O
5.ED.20Liebigite
Ca
 
2
(UO
 
2
)(CO
 
3
)
 
3
 · 11H
 
2
O
5.ED.25Rabbittite
Ca
 
3
Mg
 
3
(UO
 
2
)
 
2
(CO
 
3
)
 
6
(OH)
 
4
 · 18H
 
2
O
5.ED.30Andersonite
Na
 
2
Ca(UO
 
2
)(CO
 
3
)
 
3
 · 6H
 
2
O
5.ED.35Grimselite
K
 
3
Na(UO
 
2
)(CO
 
3
)
 
3
 · H
 
2
O
5.ED.40Widenmannite
Pb
 
2
(UO
 
2
)(CO
 
3
)
 
3
5.ED.45Znucalite
Zn
 
12
Ca(UO
 
2
)(CO
 
3
)
 
3
(OH)
 
22
 · 4H
 
2
O
5.ED.50Agricolaite
K
 
4
(UO
 
2
)(CO
 
3
)
 
3

Other Names for Čejkaite

Synonyms:
IMA1999-045
Other Languages:
German:Cejkait
Russian:Чейкаит
Spanish:Cejkaita

Other Information

Fluorescence in UV light:yellow to yellow-green
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 Čejkaite

Reference List:

- +
Ondrus, P., R. Skala, F. Veselovsky, J. Sejkora & C. Vitti (2003): Čejkaite, the triclinic polymorph of Na4(UO2)(CO3)3 - a new mineral from Jachymov, Czech Republic: American Minereralogist: 88, 686-693.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Čejkaite

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    • Localities for Čejkaite

    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.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov (St Joachimsthal) District
    		American Mineralogist: 84: 688.
    Tvrdý, J. & Plášil, J. (2010): Jáchymov - Reiche Erzlagerstätte und Radonbad im böhmischen Westerzgebirge. Aufschluss 61, 277-292.
    Excalibur Mineral Co. specimens
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Rožná deposit
    		Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) (2008) 16, 2, 212-216
    Sejkora, J. et al.: Nálezy čejkaitu v důlní chodbě uranového ložiska Rožná, Česká republika. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 2008, vol. 16, 2, 212-216.
    Hungary
     
    • Baranya Co.
      • Mecsek Mts.
    		Szakáll,2008
    Spain
     
    • Catalonia
      • Lleida (Lérida)
        • El Pallars Jussà
          • La Torre de Cabdella
            • La Plana de Mont-ros
              • Castell-estaó
    		Eureka blogspot
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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