flint   (French name: silex )


Chemical formula: See chert

Family: Rock

Status: NON APPR

Display mineral: NON

 

Luminescence:

Longwave UV (365nm) colors:

                                            


Green , Yellowish White , Pale Yellow , Orangy yellow , Orange , Dark Orange /Tawn , Tawn , Greenish white , Yellowish ,

Shortwave UV (254nm) colors:

                                            


Green , Yellowish White , Pale Yellow , Orangy yellow , Orange , Dark Orange /Tawn , Tawn , Greenish white , Yellowish ,

 

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

Type d'UV

Couleur

Intensité

Fréquence d'observation

UV longs (365nm):

No data

UV moyens (320 nm):

No data

UV courts (254 nm):

No data
 

Comments:

A nodular chert, often grey/black, formed as nodules in Creataceous chalk.

Fluorescent colors are green due to uranyle ions presence or typically yellow-white to brown at all UV wavelengths. The outer part of the chert may have absorbed some organic matter from an exposure to it at some point in its history.

Activator(s) and spectrum:

Activator(s): (UO2)2+ (ion Uranyle) en impureté, ST (Singlet-triplet)-Matière organique en impureté,  

No spectrum yet

Best localities for fluorescence (*):

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

Bibliographic reference for luminescence:

Mineralogical reference on the Internet:

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

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

Internet Search:

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Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
A request providing no result means only that no such reference exists in the database, but it does not mean that what you are looking for does not exist, just not to our knowledge. If you think you have found an error or omission, please let us know via the contact page being sure to cite the source of information.