kakov
Joined: 24 Jul 2013
Posts: 39
Location: Madrid
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 Posted: Jul 24, 2013 06:44 Post subject: Phosphate growing on Cacoxenite from Buenas Bodas (Toledo, Spain) - w SEM & |
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Don’t miss this great post in the Spanish FMF by jm:
https://foro-minerales.com/forum/viewtopic.php?t=9427
Exciting as a detective story and with gorgeous SEM fotos.
We are looking for the identity of two minerals from Buenas Bodas, Sevilleja de la Jara, Toledo, Spain. (known for historical findings of gold, but this might be even more exciting)
One of the minerals is probably Cacoxenite.
For the other the EDS analysis (atomic % relative to the detected elements - not possible to see elements with weight less than C) shows:
C O F Al Si P Ca Fe Ga Sr Ba lant.
18 60 3 8 1 7 1 < 1 < 1 1 < 1 < 1
where the C is contamination in that particular laboratory, and the Si is probably coming from the matrix - so disregard from these two. The rest of the composition is quite reliable (analysis repeated on several crystals)
The crystals are growing on top of the cacoxenite needles; see SEM photos in the Spanish post.
So far Iangreyite, Crandallite or a phosphate related to these are suggested.
Any suggestions/ideas/comments?
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prcantos
Site Admin
Joined: 17 Apr 2012
Posts: 243
Location: Granada (Spain)
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| Posted: Jul 24, 2013 13:35 Post subject: Re: Phosphate growing on Cacoxenite from Buenas Bodas (Toledo, Spain) - w SEM & |
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| kakov wrote: | | ...Any suggestions/ideas/comments? |
I add here the pictures from the Spanish-side FMF to make it easier.
| Description: |
Cacoxenite?
Buenasbodas, Sevilleja de la Jara, Toledo, Castilla-La Mancha, Spain
0.5 mm.
These are the radiating aggregates, probably cacoxenite (translated from the Spanish-side FMF). |
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| Viewed: |
6385 Time(s) |
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| Description: |
???
Buenasbodas, Sevilleja de la Jara, Toledo, Castilla-La Mancha, Spain
0.004 mm.
The unidentified prisms. |
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| Viewed: |
6458 Time(s) |
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| Description: |
???
Buenasbodas, Sevilleja de la Jara, Toledo, Castilla-La Mancha, Spain
0.003 mm. |
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| Viewed: |
6385 Time(s) |
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_________________
Pablo Rodríguez Cantos
Λίθον˛ον απεδοκίμασαν˛οι οικοδομουντες |
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