Scheikundige formule: BaCO3
Familie: Carbonaten
Status: IMA-GP
Kristal Systeem: Orthorhombisch
Mineraal om tentoon te stellen: Nee
UV Type | Kleur | Intensiteit | Frequentie van de observatie |
---|---|---|---|
Lange Golven (365nm): | Blauw wit | Sterk | Midden Golven (320 nm): | Blauw wit | Korte Golven(254 nm): | Blauw wit | Middelmatig |
Andere kleuren korte golven: | Violet blauw , |
Daglicht foto
Whitherite, Cave-in-Rock Sub-District, IL-KY Fluorspar District, Hardin Co., Illinois, USA;
Photo and Copyright: Middle Earth Minerals
http://middleearthminerals.com
Used with permission of the author
Korte golf foto (254nm)
Whitherite, Cave-in-Rock Sub-District, IL-KY Fluorspar District, Hardin Co., Illinois, USA;
UV SW White. Photo and Copyright: Middle Earth Minerals
http://middleearthminerals.com
Used with permission of the author
Foto galerij:
...Naar de volledige galerij (3 beelden in totaal)
UV Type | Kleur | Intensity | Observation Frequency |
---|---|---|---|
Lange golven(365nm): | Blauw wit | Sterk | Midden Golven (320 nm): | Blauw wit | Korte golven (254 nm): | Blauw wit | Sterk |
Witherite was mentionned in 1903 by Kunz and Baskerville. Flash of yellow-orange light before white phosphorescence (Manuel Robbins)
Voornaamste Activator:
Andere activatoren: Eu2+ ,
Pieks in het spectrum (nm):
Eu2+ replacing Ba2+ : Peak at 390nm peak at 480 nm (unknown)
Col. G. Barmarin; Spectre: G. Barmarin
Witherite was studied by steady-state luminescence spectroscopy and trivalent REE, such as Gd, Dy and Eu, have been found (Gorobets and Rogojine 2001). Excitation by CW laser with 532 and 780 nm revealed several luminescence lines and one broad band. IR lines under 780 nm excitation may be evidently ascribed to Nd3+. The band is somewhat similar to orange emission of barite ascribed to Ag+ luminescence center. (Gaft)
(*)Gegevens zijn niet exhaustieve, ze zijn beperkt tot de meest belangrijke plaatsen voor fluorescentie
http://www.mindat.org/show.php?name=Witherite
http://webmineral.com/data/Witherite.shtml
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