Database of luminescent Minerals


Chemical Formula: CaSO4

Familly: Sulfates

Status: IMA-GP

Crystal System: Orthorhombic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Pink Weak
Short Waves (254 nm):      Red Weak
Other colors LW:                    
White , Bluish White , Blue , Bluish ,
Other colors SW:                    
White , Bluish White , Blue , Bluish ,

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

No Data

Thermoluminescence: Yes

Main Activator(s) and spectrum:

Most Common Activator: Sm2+

Other activators:            S2- , Eu2+ , Ce3+ , Eu3+ , Dy3+ , Tb3+ , Mn2+ , O* , Nd3+ , Yb2+ ,

Peaks in the spectrum (nm):

Mn2+II, NOT repl. Ca2+: 600-630nm
O2- repl. [SO4]2-: 400-500nm
S2-: 500-600nm (in N-liquid)
Ce3+: 320, 340nm
Eu2+: 385nm
Tb3+: 416, 438nm
Dy3+: 475, 478, 480, 546, 574, 577, 582nm
Sm2+: 630, 632, 633, 637, 640, 680, 687, 689, 690, 693, 696, 699, 700, 703, 704, 706, 706, 708, 727, 732, 735, 740, 744, 745, 748, 765, 766, 767, 769, 777, 782, 818, 820, 821, 832nm
Nd3+: 838, 839, 892, 899nm
Eu3+: 593, 618, 691, 702nm
Yb2+: 525nm

Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.


  To the spectrum gallery (8 spectra in the gallery)

Comments on activators and spectra:

Activator: Mn2+ or REE substituted to Ca (Gaft); O-2 (Gorobets);

Best Locality for luminescence(*):

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

Bibliographical Reference for luminescence:

Mineralogical Reference on internet:

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