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05 May 2022 | Story Leonie Bolleurs | Photo Supplied
Prof Hennie van Coller and Prof Hendrik Swart
Prof Hennie van Coller, left, received the the NP van Wyk Louw medal, and Prof Hendrik Swart, right, received the Havenga Prize for Physical Sciences.

The board of the Suid-Afrikaanse Akademie vir Wetenskap en Kuns (SAAWK) recently (22 April) announced the winners of the 2022 prizes. The academy, which was established in 1901, aims to promote the use of Afrikaans in science and the arts.

Havenga Prize for Physical Sciences

Prof Hendrik Swart, NRF B1-rated researcher, SARChI Research Chair in Solid-state Luminescent and Advanced Materials, and Senior Professor in the Department of Physics at the University of the Free State (UFS), received the prestigious Havenga Prize for Physical Sciences.

He says it is an honour to receive this award. “When I look at the list of names that have received the award in the past, I am very humbled and surprised to receive such an award.”

The Havenga Prize, for which candidates are specifically judged on research publications and evidence of their promotion of Afrikaans, has been awarded annually for the past 77 years for original research in the natural sciences or a technical field. 

A collaboration with researchers from the Nelson Mandela University (NMU) on semiconductor materials that improve the efficiency of solar cells, resulted in Prof Japie Engelbrecht (Emeritus Professor, NMU) nominating Prof Swart for this award. He is involved in an NRF collaborative research project with NMU and Linköping University in Sweden.

Prof Swart has played an important role in the acquisition of numerous research devices for analysing the thin layer of phosphor, and the semiconductor devices that can be made from such materials. His research and zeal for his work led to the establishment of the national nano-surface characterisation facility (NNSCF) containing state-of-the-art surface characterisation equipment. 

The PHI Quantes XPS system, for instance, is the first in Africa and one of only 20 in the world. The Quantes XPS system uses X-rays to determine the chemical composition of molecules on the surface of a sample. The system is unique in the sense that it also has an extra X-ray source that can determine the chemical state below the surface, which was not possible in the past. This will help to dictate the position of defects in phosphor materials, which will consequently enable the department to create better phosphor for solid-state lighting as well as solar cell applications.

The most meaningful for him, however, was the production of several well-trained postgraduate students and the generation of high-impact, well-cited scientific publications.

This award, one of several awards he has received during his career, does not signify the end of the road. On the contrary, he is looking forward to improving solar cells by using the phosphor materials they have manufactured, applying it on glass windows doped with phosphors to generate electricity.

NP van Wyk Louw Medal and Alba Bouwer Prize for children's literature

The NP van Wyk Louw Medal was awarded to Prof Hennie van Coller, a researcher who is also affiliated to the UFS. Prof Van Coller, currently an emeritus outstanding professor and research fellow at the university, was a former Head of the UFS Department of Afrikaans and Dutch, German and French, as well as Chairperson of SAAWK. He is known for his impact on the literary world, both locally and internationally, through the quality of his scientific articles and books. 

According to SAAWK, the body awards the NP van Wyk Louw Medal for a person’s creative contributions to the exploitation, organisation, and continuous development of a section of the humanities, significantly contributing to the advancement of the humanities.

Jaco Jacobs, the children’s author of more than 170 books who recently presented the 35th DF Malherbe Memorial Lecture at the UFS, was also awarded for his work. Jacobs, also a UFS alumnus, received the Alba Bouwer Prize for children's literature. The prize, which is awarded every three years, was presented to Jacobs for the book Die boekwinkel tussen die wolke, written during the COVID-19 lockdown period. 

SAAWK will present the awards later this year during two virtual award ceremonies in July. 

News Archive

Mineral named after UFS professor
2017-09-29

Description: Mineral tredoux Tags: International Mineralogical Association, tredouxite, Prof Marian Tredoux, Department of Geology, Barberton 

Tredouxite (white) intergrown with bottinoite (light grey),
a complex hydrous alteration product. The large host
minerals are nickel-rich silicate (grey), maybe willemseite,
and the spinel trevorite (dark grey).


More than five thousand minerals have been certified by the International Mineralogical Association (IMA). One of these minerals, tredouxite, was recently named after an academic at the University of the Free State (UFS). 

Tredouxite was named after Prof Marian Tredoux, an associate professor in the Department of Geology, to acknowledge her close to 30 years’ commitment to figuring out the geological history of the rock in which this mineral occurs. The name was chosen by the team which identified the new mineral, consisting of Dr Federica Zaccarini and Prof. Giorgio Garuti from the University of Leoben, Austria, Prof. Luca Bindi from the University of Florence, Italy, and Prof. Duncan Miller from the UFS. 

They found the mineral in the abovementioned rock from the Barberton region in Mpumalanga, in May 2017.

In the past, a mineral was also named after Marie Curie
With the exception of a few historical (pre-1800) names, a mineral is typically named either after the area where it was first found, or after its chemical composition or physical properties, or after a person. If named after a person, it has to be someone who had nothing to do with finding the mineral.

Prof Tredoux said: “As of 19 September 2017, 5292 minerals had been certified by IMA. Of these, 81 were named after women, either singly or with a near relation. Marie Curie is named twice: sklodowskite (herself) and curite (plus husband). Most of the named women are Russian geoscientists.”

Another way to assess the rarity of such a naming is to consider that fewer than 700 minerals have been named after people. Given that there are by now seven billion people on the planet, it means that a person who is granted a mineral name becomes one in 10 million of the people alive today to be honoured in such a way. To date, over a dozen minerals had been named after South Africans, three of them after women (including tredouxite).

It contains nickel, antimony and oxygen
The chemical composition of tredouxite is NiSb2O6 (nickel antimony oxide). This makes it the nickel equivalent of the magnesium mineral bystromite (MgSb2O6), described in the 1950s from the La Fortuna antimony mine in Mexico.  

“This announcement is of great academic importance: the discovery by the Italian team of a phase with that specific chemical composition will undoubtedly help me and my co-workers to better understand the origin of the rock itself,” she said. She also expressed the hope that it may raise interest in the Department of Geology and the UFS as a whole, by highlighting that world-class research is being done at the department. 

The announcement of this new mineral was published on the International Mineralogical Association Commission on New Minerals, Nomenclature and Classification website, the Mineralogical Magazine and the European Journal of Mineralogy.

 

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