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Identity HelpIllite? Kaolinite?

10th Jul 2018 00:54 UTCRobert Darabos

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Recent find in the Cuchumatantes Mountains in Western Guatemala, in the city of Huehuetenango.

Several different kinds of clays.

I hike the mountain this was found at often. There's lots of Feldspar, most of it breaking down into Dickite.

This is from the other side of the same mountain.

It scratches easily with a fingernail, so I'm assuming it is a clay mineral.

This one stuck out to me more as it is the only material in the area with inclusions.

They seem like tiny Quartz crystals (who knows though) and it breaks apart easily into sheets, sort of like muscovite would. Made me think it could Be Ilite? Thoughts?


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10th Jul 2018 00:59 UTCRobert Darabos

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Three more images of different areas with different looking clay minerals.

Again, all can be scratched with a fingernail.

The first and second photos show what most of the mountain looks like. Small 'sheets' of material that easily breaks. This material I'm not certain of... past posts people have thought Saprolite.

The third image shows material about another 30 feet away and it is all powdered. I thought perhaps it is Saprolite.




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10th Jul 2018 01:27 UTCReiner Mielke Expert

The only way to know what it is, is with XRD. Also they are most likely mixtures.

10th Jul 2018 12:45 UTCPaul Brandes 🌟 Manager

Agree with Reiner. XRD must be used to determined the difference.
 
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