Studies of Inorganic Layer and Framework Structures Using Time-, Temperature- and Pressure-Resolved Powder Diffraction Techniques

This thesis is concerned with in-situ time-, temperature- and pressure-resolved synchrotron X-ray powder diffraction investigations of a variety of inorganic compounds with twodimensional layer structures and three-dimensional framework structures. In particular, phase stability, reaction kinetics, thermal expansion and compressibility at non-ambient conditions has been studied for 1) Phosphates with composition MIV(HPO4)2·nH2O (MIV = Ti, Zr); 2) Pyrophosphates and pyrovanadates with composition MIVX2O7 (MIV = Ti, Zr and X = P, V); 3) Molybdates with composition ZrMo2O8. The results are compiled in seven published papers and two manuscripts. Reaction kinetics for the hydrothermal synthesis of α-Ti(HPO4)2·H2O and intercalation of alkane diamines in α-Zr(HPO4)2·H2O was studied using time-resolved experiments. In the high-temperature transformation of γ-Ti(PO4)(H2PO4)·2H2O to TiP2O7 three intermediate phases, γ'-Ti(PO4)(H2PO4)·(2-x)H2O, β-Ti(PO4)(H2PO4) and Ti(PO4)(H2P2O7)0.5 were found to crystallise at 323, 373 and 748 K, respectively. A new tetragonal three-dimensional phosphate phase called τ-Zr(HPO4)2 was prepared, and subsequently its structure was determined and refined using the Rietveld method. In the high-temperature transformation from τ-Zr(HPO4)2 to cubic α-ZrP2O7 two new orthorhombic intermediate phases were found. The first intermediate phase, ρ-Zr(HPO4)2, forms at 598 K, and the second phase, β-ZrP2O7, at 688 K. Their respective structures were solved using direct methods and refined using the Rietveld method. In-situ high-pressure studies of τ-Zr(HPO4)2 revealed two new phases, tetragonal ν-Zr(HPO4)2 and orthorhombic ω-Zr(HPO4)2 that crystallise at 1.1 and 8.2 GPa. The structure of ν-Zr(HPO4)2 was solved and refined using the Rietveld method. The high-pressure properties of the pyrophosphates ZrP2O7 and TiP2O7, and the pyrovanadate ZrV2O7 were studied up to 40 GPa. Both pyrophosphates display smooth compression up to the highest pressures, while ZrV2O7 has a phase transformation at 1.38 GPa from cubic to pseudo-tetragonal β-ZrV2O7 and becomes X-ray amorphous at pressures above 4 GPa. In-situ high-pressure studies of trigonal α-ZrMo2O8 revealed the existence of two new phases, monoclinic δ-ZrMo2O8 and triclinic ε-ZrMo2O8 that crystallises at 1.1 and 2.5 GPa, respectively. The structure of δ-ZrMo2O8 was solved by direct methods and refined using the Rietveld method.

Nationen och hans hustru : Feminism och nationalism i Israel med fokus på Miriam Kainys dramatik

The aim of this thesis is to elucidate the tension between feminism and nationalism in Israel and to investigate the ways by which such discursive currents mark the identities of Israeli women. The specific field of investigation is Israeli theatre, and the identities examined are dramatic characters created by the Israeli playwright Miriam Kainy. Also examined is the character of the playwright herself. Theatre is being observed as a specific field of society in which the position of women can be clarified. What kind of women characters the Israeli theatre produces is therefore a leading question for this study. Feminist theories, focusing on gender aspects of power relations, together with the postcolonial perspective, which considers power relations by focusing on ethnicity and geopolitical aspects, provide the theoretical tools. The social constructionist viewpoint is used since it provides an appropriate understanding of important notions for the thesis, such as nation and identity, considering them as constructions created by discourse. The discourses focused upon are the national v. the feminist discourse and theatre is viewed as a discourse mediator, which is why the dramatic text is the object of the analysis. The specific method of analysis is inspired by Norman Fairclough’s critical discourse analysis. The main part of the thesis consists of a discursive analysis of five women characters, constructed within a period of about five decades, namely between the 1950s and 1990s. Each one of these characters consists of an articulation which is considered representative of a specific time-relevant discursive struggle between the two discourses in question. One of the central assumptions of the thesis is that the Israeli national identity is thoroughly masculine. The identity problems it has been causing Israeli women since the time of the pioneers until today are clearly illuminated throughout the analysis. The conclusion emphasises that the subjectpositions being introduced by Israeli national discourse, namely the ways of being a New Jew, an Israeli, collide with those introduced by feminist discourse, i.e. ways of being an independent woman subject. Nevertheless, each and every character demonstrates creative ways of transforming the discourses by aiming at a hybrid formation.