[Rockhounds] Terlingua-type calcite

[Axel Emmermann]

Oops, this was meant to go to Don, Pete, Earl and list...


Axel

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
> [mailto:rockhounds-bounces at lists.drizzle.com] Namens Axel Emmermann
> Verzonden: zaterdag 2 augustus 2008 20:28
> Aan: 'Rockhounds at drizzle.com: A mailing list for rock and gem
> collectors'
> Onderwerp: RE: [Rockhounds] Terlingua-type calcite
>

>
> Well, it's not Marfunin.
> I found the text-"snippet" and it IS the other way around.
> Divalent REE feel the crystal field effect much more than the
> trivalent ones (generally speaking, there's all sorts of
> "but" and "or" and such... ). It makes sense, in a reverse way...
> The text refers to the "daylight" colors of minerals but that
> has to count for fluorescence too.
> I knew I read something about it somewhere and I assumed that
> it was Arnold Marfunin 's "Spectroscopy, Luminescence and
> Radiation Centers in Minerals"
> because it struck me as something to remember.
> The full text can be found in:
> "Farbe und Lumineszenz von Mineralien" by Gabriele Steffen, chapter 3:
> Farben durch Kristallfeld-Effekte, pages 56-57. ISBN:
> 3-13-118341-1 2000 ENKE im Georg Thieme Verlag Stuttgart - New York.
>
> I just thought I needed to get it set right ;-)))
>
> Cheers
> Axel
>




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