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About ČejkaiteHide

Jiří Čejka
pale yellow to beige
Specific Gravity:
Crystal System:
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. He had earlier published a study on the thermal decomposition of the synthetic analog of this mineral.
This page provides mineralogical data about Čejkaite.

Classification of ČejkaiteHide

Approval Year:
First Published:
Approval History:

E : Uranyl Carbonates
D : UO2:CO3 = 1:3

Physical Properties of ČejkaiteHide

pale yellow to beige
light yellow
3.67 g/cm3 (Measured)    3.766 g/cm3 (Calculated)

Chemical Properties of ČejkaiteHide


Crystallography of ČejkaiteHide

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

Type Occurrence of ČejkaiteHide

General Appearance of Type Material:
Thin earthy efflorescence
Place of Conservation of Type Material:
National Museum, Prague, Czech Republic (P1p 17/99).
Ondrus, P., Skala, R., Veselovsky, F., Sejkora, J., Vitti, C. (2003) Čejkaite, the triclinic polymorph of Na4(UO2)(CO3)3 - a new mineral from Jachymov, Czech Republic. American Minereralogist: 88: 686-693.

Synonyms of ČejkaiteHide

Other Language Names for ČejkaiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Grimselite7 photos of Čejkaite associated with Grimselite on mindat.org.
Línekite3 photos of Čejkaite associated with Línekite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.ED.05BayleyiteMg2(UO2)(CO3)3 · 18H2OMon.
5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2OMon. 2/m : P21/m
5.ED.15AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2OTric. 1 : P1
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2OOrth. mm2
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2OMon.
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2OTrig. 3 : R3
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2OHex.
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2OOrth.
5.ED.50AgricolaiteK4(UO2)(CO3)3Mon. 2/m : B2/b

Fluorescence of ČejkaiteHide

yellow to yellow-green

Other InformationHide

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 ČejkaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Li, Y., Krivovichev, S.V., Burns, P.C. (2001) The crystal structure of Na4(UO2)(CO3)3 and its relationship to schröckingerite. Mineralogical Magazine: 65: 297-304.
Ondrus, P., Skala, R., Veselovsky, F., Sejkora, J., Vitti, C. (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) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.
J. Plášil, Fejfarová, K., Dušek, M., Škoda, R., Rohlíček, J. (2013) Actinides in Geology, Energy, and the Environment. Revision of the symmetry and the crystal structure of čejkaite, Na4(UO2)(CO3)3. American Mineralogist: 98: 549-553.

Internet Links for ČejkaiteHide

Localities for ČejkaiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
  • Karlovy Vary Region
    • Karlovy Vary District
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
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.
  • Vysočina Region
    • Žďár nad Sázavou District
      • Bystřice nad Pernštejnem
Collection of Alex Earl, obtained from Jaroslav Hyrsl
      • Rožná
        • 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.; SeJkora, J., Pauliš, P., Jelínek, J., & Vlk, J. (2008). The finds of čejkaite at mine adit of the uranium deposit Rožná, Czech Republic. Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, 16(2).
  • Baranya
    • Mecsek Mts
  • 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
  • Kiev Oblast
    • Ivankiv Raion
      • Pripyat
Burakov, B.E., Strykanova, E.E., Anderson, E.B. (): Secondary Uranium Minerals on the Surface of Chernobyl “Lava”. MRS Proceedings: 465; : http://dx.doi.org/10.1557/PROC-465-1309
  • 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
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Travis Olds collection; Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., and Čejka, J. (2018) Markeyite, a new calcium uranyl carbonate mineral from the Markey mine, San Juan County, Utah, USA. Mineralogical Magazine, 82, 1089-1100.
Mineral and/or Locality  
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