The work involved a multidisciplinary task, undertaking the study of phases of mineralogical and physico-chemical interest. Selenites were synthesised, given that they are a new field and likely to present original physical properties. Their study was carried out using crystallographic methods and the behaviour of their physical properties was investigated.
As a result of this research, twenty-four selenites of different transition metals were synthesised. These were grouped as a function of the conditions of the pressure and the temperature employed in their synthesis, differentiating three blocks of eight phases each. New polymorphs obtained were: Mn(SeO3).H2O(A,B), in low pressure and temperature conditions, Mn3(SeO3)3.H2O and Mn4(SeO3)4.H2O phases in moderate pressure and temperature conditions, and Mn(SeO3)(A,B) polymorphs in high pressure and temperature conditions.
The aims were, apart from obtaining new selenites, the undertaking of a structural analysis by means of X-ray diffraction in monocrystalline and in polycrystalline samples. The studies carried out enabled the elucidation of the crystallographical parameters for each phase. The X-ray diffraction diagrams for the polycrystalline sample showed a significant absence of impurities. Finally, the structures of twenty-four phases, obtaining the link distances, the distortion and the equilibrium of the loads of the units present, were investigated.
Irati Kortabitarte | alfa
A promising target in the quest for a 1-million-year-old Antarctic ice core
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Tropical Peat Swamps: Restoration of Endangered Carbon Reservoirs
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A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
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The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
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