Dear Kenneth,

Thanks for your attention.I only checked by laser raman spectroscopy. These minerals found as daughter minerals in fluid inclusions. Their size are about 2-4 microns. 

Regards

Thanks for your answer. I have crashed the sample and analyzed the opened fluid inclusions by EPMA (EDX) but it was unsuccessful. I don't access to Debye-Scherrer or Gandolfi film camera. I think they are the old version of XRD analysis.   

Hi! If  you want to find match of your daugter phase in RRUFF database using CrystalSleuth software, you need pure Raman spectra of the mineral. Your spectra is combination of spectra of daugter phase and the host one. I suggest, first, you have to subtract host (quartz) spectra from X one (see attached). Then, to check substracted spectra by RRUFF. The spectra of your mineral is close to clinocervantite, but bands shift by ~ 10 cm-1. Do you suggest antimony mineralisation in your deposits?

Dear Igor

Thanks a lot for your answer and suggestion. I will try your good suggestion. There is no antimony mineralization in this porphyry copper deposit.

Regards

Hi, the daughter mineral is quite common in high salinity high temperature environments, but the exact composition and structure of this mineral remains for me a mistery for many years. In addition to peaks in low wavenumbers region at 199 and 385 cm-1 it also contains a very strong and sharp peak at 3451 cm-1 indicating the presence of OH group in the structure. FIB-EDS analyses in combination with Raman proved the presence of chlorine and iron in roughly equeal amounts and often minor amount of potassium (unpublished data). I have found it in fluid inclusions for instance in the Vysoka-Zlatno porphyry Cu-Au deposit (Mineralium Deposita, 2010/45, 817-843 – it also includes published Raman spectrum of it), in Biely vrch Au-porphyry deposit in salt melt inclusions (Geology, 2014/6/495-498 – see data repository for spectrum), Chorloque Sn pophyry in Bolivia, Dartmoor granite related to Sn-W-F veins. I have not found the Raman spectrum in any Raman spectra database available on internet yet.

Dear Peter,

Great! As mentioned before, I have analyzed the crashed fluid inclusions to identify these daughter minerals (about 1/3 of my halite-bearing inclusions have these daughter minerals). I got similar chlorine, iron and potassium peaks. But I am not sure these peaks are exactly related to my daughter minerals. I attached my EDS graph for your checking.

Regards

I could not find any attached file, but the information on composition is interesting. In the past I have also tried to identify the mineral based on EDS from opened inclusions, but I recognised that opened inclusions might not contain the mineral any more due to quick oxidation on air. Or at least, it was always difficult to confirm its presence. If it is stable outside inclusions I think it would be frequently found as a "normal" mineral with already published Raman spectrum.

Dear Peter

Ok! It was a format problem. I have attached the graph. Thanks a lot for your help.

Regards