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Improving Mindat.orgSvanbergite?

26th Jan 2015 17:18 UTCJohn Sobolewski Expert

To me, photo http://www.mindat.org/photo-523577.html looks like the typical hydroxylapatite crystal groups that I have from the Champion Mine rather than Svanbergite. Has it been anaysed and shown to be Svanbergite? John S.

26th Jan 2015 17:33 UTCRob Woodside 🌟 Manager

message sent

14th Mar 2015 07:04 UTCHerwig Pelckmans

Dear John,


I was surprised when I read your opinion on this specimen.

You mention "the typical hydroxylapatite crystal groups that I have from the Champion Mine".

Could you please post a picture (or pictures) of these, so we can see what you are referring to?


Cheers, Herwig

11th Apr 2015 01:35 UTCVik Vanrusselt Expert

Hello all,


Paul Mestrom has conducted a few tests on the specimen in question. The following is a translation of the e-mail I received from him:


- The orange-brown crystals in question dissolve somewhat in HCL


- the PHOSPHATE TEST was NEGATIVE for this piece (The same test was repeated with a previously positively identified Apatite. This 2nd test was positive)


- One of the positive ions (Sr or Al) could cause this negative result, but it is odd to say the least


- The SULPHATE TEST also proved NEGATIVE


- The Sr could cause this negative result


Therefore, the correct ID for this specimen is still to be determined.


Vik
 
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