Database of luminescent Minerals


Chemical Formula: CaY2(CO3)4 6H2O

Familly: Carbonates

Status: IMA-A

Crystal System: Orthorhombic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Violet
Short Waves (254 nm):      Violet red

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

No Data

Main Activator(s) and spectrum:

Most Common Activator: Eu3+

Other activators:            Dy3+ , Tb3+ , Gd3+ ,

Peaks in the spectrum (nm):

Eu(III): Ex. 395 nm (7F6→5L6)/Em. 615 nm (5D0→7F2);

Tb(III): Ex. 380 nm (7F6→5D3)/Em. 545 nm (5D4→7F5);

Gd(III): Ex. 275 nm (8S7/2→ 6D3/2)/Em. 312 nm (6P7/2→8S7/2);

Dy(III): Ex. 352 nm/Em. 575 nm (4F9/2→6H13/2)

No spectrum for the moment

Comments on activators and spectra:

The strongly reddish-purple fluorescence of the mineral under ultraviolet light was found to depend on the following fluorescent rare-earth(III)ions. Eu(III), Tb(III), Dy(III), and Gd(III). These rare-earth(III)ions in the mineral showed many sharp excitation and emission bands. The bands of the luminescence of Kimuraite could be attributed to the f-f allowed transition of Eu(III): Ex. 395 nm (7F6→5L6)/Em. 615 nm (5D0→7F2); Tb(III): Ex. 380 nm (7F6→5D3)/Em. 545 nm (5D4→7F5); Gd(III): Ex. 275 nm (8S7/2→ 6D3/2)/Em. 312 nm (6P7/2→8S7/2);Dy(III): Ex. 352 nm/Em. 575 nm (4F9/2→6H13/2), respectively. (see bibliography)


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:

Search on Internet:

  Search for images on 'Google Image'

  Search for documents in English on Google

  Search for documents in any languages on Google

  Search on Wikipédia


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.


Quick search by fluorescent mineral name: