Database of luminescent minerals 

HOLDENITE

DOUBTFUL FLUORESCENCE but sometimes cited in luminescence literature

Chemical formula: (Mn⁺²,Mg)₆Zn₃(AsO₄)₂(SiO₄)(OH)₈

Family: Silicates

Status: IMA-GP

Crystal system : Orthorhombic

Display mineral: NON

Luminescence:

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

No data

Activator(s) and spectrum:

No spectrum yet

Comments on spectrum and activators:

It was added to the list of fluorecent minerals of Franklin in 2014 after a study of all the sample of the Franklin Museum with blue light by Charles Mazel and Earl R Verbeeck. (see bibliography)

Holdenite is best excited under true blue (440-450nm) light and show a dull olive-green luminescence. In LW there is no response and it was not considered as fluorescent before this study. Only a single specimen was tested and further study must be conducted. It could be that the yellow-green luminescence of willemite under the Holdenite excited by the powerfull blue led through this mineral is filtered by the pinkiish color of holdenite letting only a dim orange-yellow color to pass through.

Best localities for fluorescence (*):

• Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA;

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

Bibliographic reference for luminescence:

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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