Mineralpedia Details for Cejkaite
Named for Dr. Jiri Cejka, a Czech mineralogist who was the former Director at the National Museum in Prague, and who specialized in spectrography and uranium minerals. Forms as extremely small, pale yellow crystals that have a hexagonal outline. Found as earthy efflorescences on a calcite vein in association with disseminated uraninite at its type locality at Jachymov in Bohemia in the Czech Republic. Few additional localities are known. Cejkaite is highly radioactive and will fluoresce a yellow to yellow-green under ultraviolet light.
Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)
IMA/CNMNC List of Mineral Names (2009) and American Mineralogist 88 (2003), 686
Cejkaite from Jachymov, Erzgegirge, Bohemia, Czech Republic
Canary yellow platy, very tiny crystals in aggregate patches to 3mm across.
Cejkaite from Svornost mine, Jáchymov, Erzgebirge, Bohemia, Czech Republic
Superb yellow flattend balls to 0.5 to 1mm across. Rich.
Cejkaite from Apex mine, Lander Co., Nevada, United States
Pulverulent bright yellow Cejkaite covering much of matrix. This is another new occurence for the State of Nevada, and is the first reported occurence in the USA.