[Rockhounds] Scapolite

[Axel Emmermann]

Hi Jeff,

I looked at the links you provided. Fun it is ;-)))
In the structure-pop-up (enlargement) of meionite  there is NO Al3+ to be
seen.
Normally it should because the Al/Si ratio increases when you shift from
marialite to meionite.
Also there a quite a few structures proposed for each of the minerals. 

Cheers
Axel

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens Jeffrey T. Cessna
> Verzonden: donderdag 25 september 2008 23:43
> Aan: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Onderwerp: Re: [Rockhounds] Scapolite
> 
> At 04:34 PM 9/25/2008, you wrote:
> >(OK, anybody tired of hearing about scapolite, just delete this!)
> 
> Ditto.
> 
> I assume that you all have looked at the crystal structure java
> applets on webmineral. If you really want to give your eyes a work
> out you can look at them in stereo. Its easier if you use the large
> pop-up and reduce the size 1 or 2 steps after you make it stereo (S
> on your keyboard).
> 
> http://webmineral.com/data/Scapolite.shtml
> http://webmineral.com/data/Marialite.shtml
> http://webmineral.com/data/Meionite.shtml
> 
> I don't know if this is useful, but it is fun.
> 
> -Jeff
> 
> 
> --
> _______________________________________________
> Rockhounds at drizzle Mailing List
> Subscription Services:
> http://lists.drizzle.com/mailman/listinfo/rockhounds
> List Home Page, with a link to the List Usage Policy:
> http://www.eclecticlapidary.com/Rockhounds/index.html