What coating was applied? Pt is pretty common material for sputter coating of SEM specimens.

Saleh how big was the mineral? Typically PGM (platinum group minerals) are tiny and it could be possible that there is mixed spectra within the EDS spectrum you collected. Because PGE occur as trace elements XRD is not suitable either. You would have to do some sort of analysis to confirm the presence of Pt i.e. fire assay provided you have enough sample mass for this...

Dear Saleh,

as you have done EDS on an SEM - please show the image.

Thomas.

Dear Saleh,

actually, there is a new Pd-silicide, described in Min Mag 2015.

Does that come close to your mineral?

Palladosilicide, Pd2Si, a new mineral from the Kapalagulu Intrusion, Western Tanzania and the Bushveld Complex, South Africa

L. J. Cabri / A. M. McDonald / C. J. Stanley / N. S. Rudashevsky / G. Poirier / H. R. Wilhelmij / W. Zhe / V. N. Rudashevsky

Thomas.

I have upload the images for your view.

We used Carbon Injection as coating

Saleh,

sorry, I cannot open these files properly.

Could you manage to have the spectra transferred to WORD or PPT or jpeg, with good resolution?

Thanks

Thomas.

Dear Saleh,

the Si-O proportions (atom%) are close to 1:2, so I think you collected signals from surrounding quartz (SiO2). Is it native Pt in a quartz matrix? Any more info on the samples?

Thomas

I agree with Lisa. I don't think such a strong signal derived from the thin Pt coatings. Actually, the main peak of Pt is similar to Zr. The spectrum of Pt always contains several peaks in places after 8 keV. I attached the spectrum of zircon for comparison.

Another comment: It is better to adjust the contrast to make the "zircon-like mineral" look clear (not so bright). Or you will lose many useful information (e.g., chemical zoning, minerals inclusions).

Anyway, I hope you really find a new Pt-silicate.

Sorry - forget all my comments in case we deal with the mineral ZIRCON (ZrSiO4).

Shame -also on me.

Thomas.