Database of luminescent Minerals

NOVACEKITE

Chemical Formula: Mg(UO₂)₂(AsO₄)₂ 10-12H₂O

Familly: Phosphates, Arseniates, Vanadates

Status: IMA-GP

Mineral for Display: No

Luminescence:

Phosphorescence (in the common meaning of the term) seen by naked eye:

Comments:

Novacekite can have two forms: nováčekite-I is triclinic while nováčekite-II is monoclinic. 

Nováčekite-I is very unstable under ambient conditions and quickly dehydrates to nováčekite-II and also to metanováčekite.

Most Nováčekite specimens in collections seem to be either nováčekite-II or metanováčekite.

Main Activator(s) and spectrum:

Most Common Activator: (UO₂)²⁺ (Uranyl ion) intrinsic

Peaks in the spectrum (nm):

(UO₂)²⁺ : 486.3, 502.6, 523.1, 546.8, 572.8, 601.7nm

Best Locality for luminescence(*):

• Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil;
• Animas Mine, Francisco Portillo, West Camp, Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico;

(*)Data are not exhaustive and are limited to the most important localities for fluorescence

Bibliographical Reference for luminescence:

• The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,
• Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
• Spectroscopic properties of uranium(VI) minerals studied by TRLFS, G. Geipel and Al. Radiochim Acta 88 (2000) ,

Luminescence Reference on internet:

Images

• Mexico: https://www.mindat.org/photo-737669.html

Mineralogical Reference on internet:

  http://www.mindat.org/show.php?name=Novacekite

  http://webmineral.com/data/Novacekite.shtml

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