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Improving Mindat.orgUranophane?

30th Nov 2017 01:30 UTCReiner Mielke Expert

https://www.mindat.org/photo-653665.html This looks more like studtite to me.

30th Nov 2017 20:18 UTCRalph S Bottrill 🌟 Manager

The yellow may be uranophane but the white certainly looks like studtite.

30th Nov 2017 20:19 UTCRalph S Bottrill 🌟 Manager

The yellow may be uranophane but the white certainly looks like studtite.


Message sent

1st Dec 2017 07:25 UTCUwe Kolitsch Manager

Aggregates/Sprays of very thin uranophane needles can appear almost white.

1st Dec 2017 11:28 UTCReiner Mielke Expert

Hello Uwe,


That may be true but without analysis it is impossible to say if it is or not.

1st Dec 2017 19:11 UTCRalph S Bottrill 🌟 Manager

There are several similar photos of studtite from this locality listed, some noting it's XRD-confirmed, and one describing how it replaces uranophane. It's possible that some of the near-white fibrous uranophane from other locations may be undergoing similar alteration? However it should be noted that a couple of the studtites from this site describe the associated yellow mineral as phosphuranylite, so some testing would be nice.

1st Dec 2017 20:39 UTCReiner Mielke Expert

I agree with you Ralph. It looks more similiar to the studtite photos than the uranophane ones. The point I am trying to make is that for that locality, if you are going to claim that something that does not look like typical uranophane from there is uranophane, you had better have an analysis to support your claim.

2nd Dec 2017 21:57 UTCRalph S Bottrill 🌟 Manager

Agree Reiner
 
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