Interesting minerals of charoite rocks. Wollastonite-Wollaston

One of the inconspicuous minerals present in charoite sales is wollastonite. It does not impart bright colors to charoitites, but it also does not dilute them, since it is present in insignificant quantities, and even then sometimes. It's like a little apple addition to a fruit pie when the pastry chef ran out of basic filling ingredients. But, nevertheless, in the patterned skarns of the Dalnegorsk deposit, this mineral is one of the most important rock-forming minerals. In addition, it is used in the manufacture of paints and enamels, as well as an additive to ceramics to reduce shrinkage. This mineral is also remarkable for its name, which refers us to one of the outstanding naturalists of the late 18th - early 19th centuries - William Hyde Wollaston (1766-1828). Wollaston was a member of the Royal Society of London from 1793, later becoming its president. He discovered the presence of absorption lines in the spectra of visible light of stars, which later became known as Fraunhofer stars. Wollaston discovered two elements of the platinum group - palladium (1803) and rhodium (1804). Experimenting with platinum, he was the first in Western Europe to invent a method of forging platinum for the manufacture of products from it. However, wollastonite did not immediately receive the name of Wollaston. Initially, this mineral was called "tafelspar", as it was called during its original description in 1793 by the Austrian mineralogist Andreas Stütz (1747-1806). But when publishing the New Dictionary of Natural Science (Natural History) in 1818 in Paris, J. Lehmann proposed and used the name "wollastonite", which found support among a number of European scientists. Both names were used in geological and mineralogical practice until the founding of the International Mineralogical Association in 1958, when the mineral was approved as wollastonite. Currently, there are three structural modifications of wollastonite - one triclinic and two monoclinic.

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