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  • Author: Jiří Sejkora x
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Abstract

Nature (Příroda) is an aggregate of more or less separate permanent natural science exhibitions. These are focused on mineralogy, meteorites and tektites, famous ore deposits and mines of the Czech Republic, prehistorical development of Czech territory, mycology and botany. The majority of “Nature” is devoted to geosciences, whereas contemporary nature of the Czech Republic will be presented in a series of multidisciplinary temporary exhibitions focused on individual phenomena of (not only) Czech nature and on the interrelations of man and nature. The mineralogical exhibition will be installed in its original location and historical furniture being a reminder of the original exhibits that have been preserved intact since the end of the 19th century.

Abstract

Linarite, PbCu2+(SO4)(OH)2, and associated minerals were studied at new locality near Kletné, where they occur in dump material of historic Ag-Pb mines exploited during the 16th century. Linarite forms thin blue coatings and tiny dark blue crystals (<1 mm in size) in small cavities, in assemblage with cerussite, brochantite and supergene copper sulfides. Mineral was identified by chemical analyses (electron microprobe), Raman spectroscopy and powder X-ray diffraction analysis. Chemical composition of the studied linarite can be expressed by empirical formula Pb0.98Cu1.06(SO4)Σ0.96(OH)2.15 and its refined unit-cell parameters are: a = 9.6944(3), b = 5.6499(2), c = 4.6846(1) Å, ß = 102.669(3)° and V = 250.50(1) Å3. Linarite formed together with other supergene minerals in the oxidation zone of the deposit by weathering of Pb- and Cu-sulphides.

Abstract

The new Treasury of the National Museum will present rare crafts-manship of precious stones and metals in connection with the natural form of these materials. The Treasury will be followed by a Numismatic Cabinet, which will introduce the history of money from Antiquity till today. The Treasury and the Numismatic Cabinet will be interconnected in a joint hall devoted to gold and silver and they will be thematically intertwined in the hallway with the presentation of production technologies. The Treasury is created in close cooperation within the National Museum – the Natural History Museum and the Historical Museum. The base line will consist of minerals from diamonds to quartz and organic matter, which will join together with goldsmiths and artisanal arts into a unique complex. The main goal of the new Numismatic Cabinet is the establishment of a numismatic exposition that will be both scholarly exact and intriguing at the same time, educating visitors of the development of payment methods from Antiquity until today in a comprehensible and attractive way. The chronological exposition will be divided into several basic thematic sequential units.