Scheikundige formule: (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 18H2O
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): | Oranje | Sterk | Korte Golven(254 nm): | Oranje | Middelmatig |
Named in 1959 by Th. G. Sahama and K. Hytönen after Fernand Delhaye (Clermont-Ferrand February 4 1880 - Saint-Gillis (Brussels) December 15 1946), of Belgian nationality. He worked in Central Africa (Type locality for Delhayeite: Mt Shaheru, Mt Nyiragongo, Goma, Kivu, Democratic Republic of Congo (Zaïre) type specimen conserved at Royal Museum for Central Africa, Tervuren seems not to be luminescent).
Voornaamste Activator: S2-
Andere activatoren: Ce3+ , Sm3+ , Eu3+ , Dy3+ , Mn2+ , Nd3+ ,
Pieks in het spectrum (nm):
S2- : large band centered at 620nm with weak vibrational structure (564, 584, 608, 622, 645, 664, 692, 719, 747nm)
Delhayelite.
Excitation: laser 405nm. Col. G. Barmarin; Spectre: G. Barmarin
Vers la galerie de spectres (3 spectres au total)
Delhayelite was studied by steady-state luminescence and S2- , trivalent REE, such as Ce, Dy, Sm, and Mn2+ were found. Excitation by CW laser at 532 and 785 nm revealed trivalent REE, mainly Eu and Nd, and evidently S2- band (Gaft).
(*)Gegevens zijn niet exhaustieve, ze zijn beperkt tot de meest belangrijke plaatsen voor fluorescentie
Images:
http://www.mindat.org/show.php?name=Delhayelite
http://webmineral.com/data/Delhayelite.shtml
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