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Čejkaite

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Formula:
Na4(UO2)(CO3)3
System:
Triclinic
Colour:
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

Approved
5.ED.50

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

Physical Properties of Čejkaite

Vitreous
Colour:
pale yellow to beige
Streak:
light yellow
Density:
3.67 g/cm3 (Measured)    3.766 g/cm3 (Calculated)

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:
Na4(UO2)(CO3)3
Essential elements:
All elements listed in formula:

Relationship of Čejkaite to other Species

5.ED.05BayleyiteMg2(UO2)(CO3)3 · 18H2O
5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2O
5.ED.15AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2O
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2O
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2O
5.ED.40WidenmannitePb2(OH)2[(UO2)(CO3)2]
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O
5.ED.50AgricolaiteK4(UO2)(CO3)3

Other Names for Čejkaite

Name in Other Languages:
German:Cejkait
Spanish:Cejkaita

Other Information

yellow to yellow-green
Health Risks:
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.

J. Plášil, K. Fejfarová, M. Dušek, R. Škoda, J. Rohlíček (2013): Actinides in Geology, Energy, and the Environment. Revision of the symmetry and the crystal structure of čejkaite, Na4(UO2)(CO3)3. Am. Mineral. 98, 549-553.

Internet Links for Čejkaite

Localities for Čejkaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
American Mineralogist: 84: 688.
Tvrdý, J. & Plášil, J. (2010): Jáchymov - Reiche Erzlagerstätte und Radonbad im böhmischen Westerzgebirge. Aufschluss 61, 277-292.
Plášil J., Hloušek J., Škoda R. (2013): Chalkonatronit, Na2Cu(CO3)2(H2O)3, ze žíly sv. Ducha, Jáchymov (Česká republika) [Chalconatronite, Na2Cu(CO3)2(H2O)3, from the „sv. Duch“ vein, Jáchymov (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 228-233.
Excalibur Mineral Co. specimens
Plášil, J., Veselovský, F., Hloušek, J., Škoda, R., Novák, M., Sejkora, J., Čejka, J., Škácha, P., Kasatkin, A.V. (2014): Mathesiusite, K5(UO2)4(SO4)4(VO5)(H2O)4, a new uranyl vanadate-sulfate from Jáchymov, Czech Republic. American Mineralogist, 99, 625-632.
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
        • 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 Vall Fosca
          • La Torre de Cabdella (La Torre de Capdella)
            • Castell-estaó
Eureka blogspot; Joan Abella i Creus and Joan Viñals i Olià (2012) NUEVOS MINERALES DE LA “MINA EUREKA”: METAMUNIRITA, SCHRÖCKINGERITA, BOLTWOODITA Y GORDAITA, CASTELL-ESTAÓ, LA TORRE DE CABDELLA, LLEIDA, ESPAÑA. - http://mineralsabella.blogspot.com.es/2012/06/nuevos-minerales-de-la-mina-eureka.html
USA
 
  • Nevada
    • Lander Co.
      • Reese River District
Tony Nikischer; Jensen, M. and J. Herrmann (2012) Uranium mineralization at the Apex Mine, Lander County, Nevada. Rocks and Minerals 87:270-276
Mineral and/or Locality  
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