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25 February 2019 | Story Ruan Bruwer
Tharina van der Walt
The hammer thrower Tharina van der Walt is one of several first-class athletes among the first-year students at Kovsies this year. She is the South African U18 champ and record-holder in 2018.

Several top athletes, some of whom were the very best in the country in their respective events at school, have joined Kovsies as first-year students. They already had their first taste of glory as Kovsies when they recently won their events at the first-year meeting.
 
Among these first-years are Jannes Schlebusch (javelin thrower), Joviale Mbisha (sprinter), Colette Uys (discus/shot-put), and Tharina van der Walt (hammer thrower), who have all represented South Africa in the past two years.
 
Schlebusch won the silver medal at the World U18 championships in 2017, but was injured last year. Great things were expected for 2019, but during the first-year meeting he injured his ankle to such an extent that he will have to undergo an operation that would put him on the sideline for the rest of the season.
 
Van der Walt was the South African schools champ in the hammer throw for girls U19 in 2018, when she managed to set up a new school record of 57,83 m. She was ranked fourth at the World U18 champs in 2017. At the same meeting, Mbisha ended 14th in the 100 m.
 
Uys, who participated in the CAA Southern Region Youth and Junior Championships last year, achieved a second place in the discus at the 2018 National Secondary Schools Championships for girls U19. Other first-years who took part in the SA’s last year, are Vicky Oelofse (1 500 m) and Michael Skosana (long jump).
 
They will strengthen Kovsie Athletics, which already boasts a large group of athletes with international experience. Of the 16 athletes who participated internationally last year, only Kesa Molotsane and Lara Orrock will not be in action for the students again.
 
■ Imperium Residence won the men’s division and Arista/Amelia were the ladies’ winners.
 

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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