Database of luminescent Minerals


ADAMITE


Chemical Formula: Zn2(AsO4)(OH)

Familly: Phosphates, Arseniates, Vanadates

Status: IMA-GP

Crystal System: Orthorhombic

Mineral for Display: Yes

Associated names (luminescent varieties, discredited names, synonymes etc.):  cupro-adamite

Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Green MediumOften
Short Waves (254 nm):      Green StrongOften
Other colors LW:          
Greenish , Greenish white ,
Other colors SW:     
Greenish ,

Daylight Picture


Adamite, Mapimi Mexique.

Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Short Waves Pictures (254nm)


Adamite, Mapimi Mexique,
OC (254 nm).
Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

 

Galerie de photos:

            ...

     To the gallery (13 images in the gallery)


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


No phosphorescence seen by naked eye whatever the type of UV

Comments:


Adamite is a classical fluorescent mineral since the discovery in 1946 of large esthetical fluorescent samples in the Ojuela Mine (Mexico).

The rarely seen Chinese adamite in limonitic matrix coming from the Dachang Sn-polymetallic ore field, Nandan County, Hechi Prefecture, Guangxi Zhuang Autonomous region looks like Ojuela specimens. The clear gemmy crystals fluoresce bright bluish-white in LW UV and the green cuprian Adamite fluoresces bright green LW. The SW response is similar for both, in a subdued green color. The Adamite is very short lived phosphorescent.


Main Activator(s) and spectrum:


Most Common Activator: (UO2)2+ (Uranyl ion) as impurities

Peaks in the spectrum (nm):

UO22+: (496), 508, 513, 529, (539), (550), 553, (560), (578)


ADAMITE, Mapimi, Mexique. Excitation: laser 405nm. Col. G. Barmarin; Spectre: G. Barmarin


Comments on activators and spectra:


Lifetime: 50μs


Best Locality for luminescence(*):


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


Bibliographical Reference for luminescence:



Luminescence Reference on internet:



Mineralogical Reference on internet:


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

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

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