Practical trainings, student assistants and theses

Evaluation of neutron activation analyses of sphalerite and galena (Id 271)

Student Assistant / Research Assistant

Neutron activation analyses have been performed on several samples as part of the development of in-house reference materials for spatially resolved trace element analysis of sphalerite (ZnS) and galena (PbS).
The resulting extensive raw data must first be checked for internal consistency, screened and read into various analysis software.
In the course of the spectrum evaluation, the respective gamma peaks must be assigned to elements. Due to various overlaps in these spectra, this assignment must be based on geochemical information from previous analyses of the samples. This qualitative evaluation is the basis for quantification.

The duration of employment is 2 months

Department: Analytics

Contact: Dr. Renno, Axel

Requirements

For this task we are looking for an analytically interested student (m/f/d) of geosciences, chemistry or material sciences who is able to work reliably and independently according to instructions.

Online application

Please apply online: english / german

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Halogen element (F, Cl, Br, and I) content and distribution in natural and synthetic sphalerite – a SIMS study (Id 236)

Master theses / Diploma theses

Foto: Sphaleritprobe für SIMS Untersuchungen ©Copyright: René ZiegenrückerDue to crystallochemical considerations, sphalerite (ZnS) as a typical sulfide mineral should not contain high contents of the halogen elements fluorine, chlorine, bromine and iodine. Current research findings proved at least for chlorine and bromine elevated contents up to 1000 µg*g-1 (Cl) and x0 µg*g-1 (Br). If it appears that the halogen elements are built into the lattice and not in fluid- and mineral inclusions we will be able to draw conclusions about the chemical as well as physicochemical parameters of the ore-forming fluids.
Using the Super-SIMS setup we could prove that all halogens are detactable in natural sphalerites.
The aim of the thesis is to analyse and compare these natural sphalerites by normal SIMS. Additionally halogen-rich synthetic sphalerites will be analysed.

Department: Analytics

Contact: Dr. Renno, Axel

Requirements

• You study geosciences, material's sciences or chemistry
• You are interested in mineralogical or analytical problems
• You are interested in modern analytical techniques
• You show initiative and good teamwork skills

Conditions

Start immediately
project period in accordance withe respective study regulations (est. 6 month)

Links:

Online application

Please apply online: english / german

Druckversion