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Identity Helpcobalt - lotharmeyerite or koritnigite ?
8th May 2012 10:00 UTCAccount Closed
All is in the title :). Thanks
http://www.alpinismeetmineraux.fr/mineralogie/macro/supermacro/supermacro731.jpg
8th May 2012 14:50 UTCRonald John Gyllenhammer Expert
Possibly Cobaltkoritnigite? Compare here: http://www.mindat.org/photo-283202.html
Ron
8th May 2012 15:52 UTCAccount Closed
But on other post someone siad to me than it's probably erythrite.... Please help me for this identification :).
8th May 2012 15:58 UTCLefteris Rantos Expert
I noticed this thread after I started a different topic concerning your photographs! See http://www.mindat.org/mesg-106-260204.html
To me, this is certainly NOT Cobaltlotharmeyerite, and most probably Erythrite. It could also be some other white arsenate such as Picropharmacolite, tinged pink by Co impurity.
I also strongly doubt that it can be Cobaltkoritnigite. Also these two photos http://www.mindat.org/photo-283202.html and http://www.mindat.org/photo-229145.html are most probably Erythrites and not Cobaltkoritnigite. True Cobaltkoritnigite shows a different distinct purple-red colour and also different crystal shape, such as in these photos (all from Bou Azzer distr.): http://www.mindat.org/photo-418291.html http://www.mindat.org/photo-418292.html http://www.mindat.org/photo-424251.html http://www.mindat.org/photo-424250.html
On the other hand, the tiny indistinct reddish-brown micro-xls scattered on Quartz and the grey sulfide, that are visible in several of your photos (most clearly here http://www.mindat.org/photo-463931.html ), are much more likely to be Cobaltlotharmeyerite.
Lefteris.
8th May 2012 16:34 UTCJolyon Ralph Founder
When corrected, these images can not be displayed in the main database.
8th May 2012 16:41 UTCAccount Closed
Ok for erythrite but change on your base error too :)
Thanks Lefteris :)
I make modification in next hours.
8th May 2012 16:47 UTCAccount Closed
I prefer this solution because color are not ever the same pink not ?
and here the same problem : (i take erythrite like this photo....)
same problem
8th May 2012 17:05 UTCLefteris Rantos Expert
Concerning this photo, the Sainfeldite ID is probably correct for the central violet-coloured crystals (I don't think it's Cobaltkoritnigite).
Concerning the pink balls, they could be either Erythrite, or Co-bearing Picropharmacolite. I really can't tell here. Association with Sainfeldite implies Picropharmacolite, but of course could also be consistent with Erythrite.
Lefteris.
8th May 2012 17:41 UTCAccount Closed
8th May 2012 19:06 UTCUwe Kolitsch Manager
8th May 2012 19:21 UTCAccount Closed
i have written to Ivan (who has sent this specimen to me)
His response : I open personately the geode, extracting 46 samples. I let 2 of them analyze and they both gave a high Mg enought to cosider them wendwilsonite.
=> Mg is enough to spell them wendwilsonite....
I correct now definitively... ;)
Fred
8th May 2012 20:01 UTCLefteris Rantos Expert
By the way, Frederic, these are beautiful photos!!
Lefteris.
8th May 2012 20:15 UTCAccount Closed
10th May 2012 19:13 UTCUwe Kolitsch Manager
If the analyses were done by SEM-EDS you have to watch out - Mg and As peaks show a very strong overlap!
13th May 2012 23:11 UTCReiner Mielke Expert
14th May 2012 18:48 UTCUwe Kolitsch Manager
15th May 2012 19:51 UTCLefteris Rantos Expert
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Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 9, 2024 23:10:12