Database of luminescent minerals 

NOVACEKITE

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

Family: Phosphates, Arseniates, Vanadates

Status: IMA-GP

Crystal system : Monoclinic

Display mineral: NON

Luminescence:

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Phosphorescence (in the common sense of the term) observable with the naked eye:

No phosphorescence visible to the naked eye under any type of UV

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.

Yellowish-green fluorescence vert-jaune: RGB (115, 255, 35) (approximatively calculated from the spectrum)

Activator(s) and spectrum:

Activator(s): (UO₂)²⁺ (ion Uranyle) intrinsèque ,

Peaks in the spectrum (nm):

(UO₂)²⁺ : 486, 502, 523, 547, 574, 601.6, 633.5nm

No spectrum yet

Best localities for fluorescence (*):

• 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;
• Mine No. 18, Paleokamariza Mines, Paleokamariza area, Lavrion District Mines, Lavreotiki, East Attica, Attica, Greece;

(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

Bibliographic 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) ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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