Chemical Formula: Na15Ca6(Fe+2,Mn+2)3Zr3(Si,Nb)(Si25 O73)(O,OH,H2O)3(Cl,OH)2
Familly: Silicates
Status: IMA-A (GP)
Crystal System: Rhomboedric
Mineral for Display: No
UV Type | Main color | Intensity | Observation Frequency |
---|---|---|---|
Long Waves (365nm): | Orange | Short Waves (254 nm): | Blue |
Other colors SW: | Bluish White , |
From Alluaiv, Russia a specimen of this manganese zirconium hydroxy silicate is said to be iron free, and fluoresces orange under LW. Strange altered pink pseudomorphs of eudialyte on apophyllite from the Diamond Jo quarry, Magnet Cove, Arkansas fluoresce blue under SW UV and is likely fine-grained mixtures containing benitoite and something else. This type of alteration is common in the nearby Jones Mill quarry. (see picture on mindat: https://www.mindat.org/photo-750511.html)
Most Common Activator: Mn2+
Other activators: Cr3+ , Ti3+ , Eu3+ , Nd3+ ,
Peaks in the spectrum (nm):
Mn2+ substituting Ca2+ : 590 nm
Ti3+ intrins. : 670 nm (Gorobets)
(?) : two luminescence bands peaking at 650 and 700 nm
Excitation by CW laser with 532 and 780 nm revealed narrow luminescence lines possibly belonging to trivalent REE (Nd3+, Eu3+) and Cr3+ and two luminescence bands peaking at 650 and 700 nm
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
http://www.mindat.org/show.php?name=Eudialyte
http://webmineral.com/data/Eudialyte.shtml
Search for images on 'Google Image'
Search for documents in English on Google
Search for documents in any languages on Google