Search for dissertations about: "chemical ordering"
Showing result 16 - 20 of 93 swedish dissertations containing the words chemical ordering.
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16. Dynamics of metal oxides surfaces and the connection to reactivity
Abstract : Many interesting chemical and physical phenomena which take place on surfaces of metaloxides rely on the material's ability to repeatedly alter the electronic surface structure. Formost metal oxides this functionality is connected to the degree of non-stoichiometry andthe presence of structural defects. READ MORE
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17. Synthesis and Characterisation of Carbide Derived Carbons
Abstract : Carbide derived carbons (CDCs) have been synthesised through chlorination of VC, TiC, WC, TaC, NbC, HfC and ZrC at different temperatures. The aim of the investigation was to systematically study changes of structural and adsorption properties depending on the synthesis conditions. READ MORE
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18. Open-Framework Germanates : Crystallography, structures and cluster building units
Abstract : This thesis is focussing on the crystallographic challenges and what knowledge we can gain from studying the different open-framework germanates. Five new open-framework germanates have been synthesized and the structures have been determined by single crystal X-ray diffraction. READ MORE
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19. Structure studies of some ternary copper chalcogenides
Abstract : Copper has in its heavier chalcogenides often a high mobility in the solid state. This behaviour has also be found for some ternary compounds where copper appears to govern the observed phase transitions and structural transformations. READ MORE
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20. Complexity of quasicrystal approximants —The RECd6 and RE13(Zn/Cd)~58 systems
Abstract : This thesis is focused on the synthesis and structural determination of a series of quasicrystal approximants in the RE13Zn~58 (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), Ce13Cd~58 and RECd6 (RE = Tb, Ho, Er, Tm and Lu) systems. Structural studies were performed by single crystal X-ray diffraction methods. READ MORE