Andrei Ionuț Apopei

5 Questions 22 Answers 0 Followers

Questions related from Andrei Ionuț Apopei

Identifying the mineral phase based on Raman spectrum.

I acquired a Raman spectrum of coquimbite. After I increase the laser power I got a photochemical alteration product, which has the main bands at 1125, 1101, 1083 (triply degenerate). For now, I...

16 April 2013 887 2 View

Another questions regarding minerals under reflected light microscope

On the attachment you can observe four distinct photos. I know that calcographic studies are not very exact and are taken over years. Because I can't do SEM-EDX or EPMA analyses at this moment I...

06 February 2013 1,522 4 View

Can anyone help me with this mineral (Reflected Light Microscope)?

See the below attachment. I have a yellowish mineral (at the bottom of each photo). For sure it is not Pyrite, and Chalcopyrite (which in the same sample, appears more yellow). This mineral shows...

30 January 2013 4,648 19 View

Correct calibration of a Reflected Light Microscope.

I'm using a ML9400 MEIJI microscope in reflected light for optical interpretation of some plates with ore minerals (especially sulphosalts). I have a big question: in cross-polarized light I have...

23 January 2013 2,529 8 View

Are these Tetrahedrite twins (using a reflected light microscope)?

I don't know exactly if is a Tetrahedrite, a Tennantite or another member of Tetrahedrite group. I attached a photo at 20x in plane polarized light and also in cross-polarized light. Is this a...

16 January 2013 3,290 9 View