Scheikundige formule: (Ca,RRE)CaNa2Be2Si4O12(F,O)2
Familie: Silicaten
Status: IMA-GP
Kristal Systeem: Orthorhombisch
Mineraal om tentoon te stellen: Nee
UV Type | Kleur | Intensiteit | Frequentie van de observatie |
---|---|---|---|
Lange Golven (365nm): | Violet roos | Sterk | Midden Golven (320 nm): | Violet roos | Zeer sterk | Korte Golven(254 nm): | Roze | Sterk |
Andere kleuren lange golven: | Blauw , Violet Roze , | ||
Andere kleuren Midden golven: | Violet Roze , | ||
Andere kleuren korte golven: | Blauw , Violet Roze , |
Daglicht foto
LEUCOPHANITE, Saga, Tvedalen, Norway;
Col. G.Barmarin; Photo: G. Barmarin
Lange golf foto (365nm)
LEUCOPHANITE, Saga, Tvedalen, Norway;
UVLW
Col. G.Barmarin; Photo: G. Barmarin
Korte golf foto (254nm)
LEUCOPHANITE, Saga, Tvedalen, Norway;
UVSW
Col. G.Barmarin; Photo: G. Barmarin
Foto galerij:
...Naar de volledige galerij (4 beelden in totaal)
UV Type | Kleur | Intensity | Observation Frequency |
---|---|---|---|
Lange golven(365nm): | Blauwachtig | Korte golven (254 nm): | Blauwachtig |
Triboluminescencie: Ja
Thermoluminescencie: Ja
To compare with meliphanite.
Voornaamste Activator: Ce3+
Andere activatoren: Eu2+ , Sm3+ , Dy3+ , Tb3+ , Mn2+ , Nd3+ ,
Pieks in het spectrum (nm):
Ce3+ repl. Ca2+ : 375, 411, 450nm
Eu2+ : 466-470nm
Tb3+ : 546nm
Sm3+: 607nm
Dy3+: 475, 488, 576nm
Nd3+: 885, 1060nm
Mn2+: 610nm
Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.
Vers la galerie de spectres (1 spectres au total)
Activators: a combinaison of RE elements - for exemple Ce3+ substituting to Ca (blue luminescence) and Mn (red luminescence) giving the magenta color (an orange flash typical of Mn(?) is seen on some samples). Cathodoluminescence: intense light-blue. The application of multiple forms of excitation (Friis et al. 2011) revealed that the UV-Blue emission in leucophanite and meliphanite consists of more than one emission center and is therefore more complex than previously thought. The most likely centers are defects related to the structure, e.g. in connection with the tetrahedral sites, and a Ce3+ centre. The difference in Na/Ca ratio between the two minerals make it possible for REE to substitute into two sites in meliphanite contrary, to just one in leucophanite. (Gaft)
Activators: Ce 3+, Eu 2+, Sm 3+, Dy 3+, Tb 3+, Nd 3+, Mn2+ substituting to Ca2+ (Gorobets in Gaft);
(*)Gegevens zijn niet exhaustieve, ze zijn beperkt tot de meest belangrijke plaatsen voor fluorescentie
Images:
http://www.mindat.org/show.php?name=Leucophanite
http://webmineral.com/data/Leucophanite.shtml
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