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Metal Organic Frameworks as Heterogeneous Catalysts
This book examines the latest research and discovery in the use of MOFs in catalysis, highlighting the extent to which these materials have been embraced by the community.
Bibliography of Magnetic Materials and Tabulation of Magnetic Transition Temperatures
This referenced compilation of magnetic transition temperatures represents (with the Addendum) papers actually received by the RMIC through May 1972 and consists of two lists (alphabetical by compounds), one for Curie and one for Neel temperatures. Where different values appeared in the literature for a single compound, all are listed with sepa rate references given for each. There is no attempt at critical evaluation, which, except for a few welt-studied and well characterized materials, would hardly be worth the effort. All that one can say for most of the compounds is that for a given material with a certain (or all too often uncertain) history of preparati'on and treatment, stoichiometry...
Ferromagnetism / Ferromagnetismus
1' (/>2 die Winkel zwischen den Magnetisierungsrichtungen der Kugeln und der Verbindungslinie der Kugelmittelpunkte bedeuten. 1m Gleichgewicht ist (/>1 = (/>2=0 oder 71:, auBer wahrend der Ummagnetisierung. Wie wir in Ziff. 18 (s. auch Ziff. 66) sehen werden, wird der Zustand (/>1=(/>2=0 bei der Koerzitiv kraft He=-VMs/r3 (fUr sich beruhrende Kugeln -(71:/6) Ms) instabil. Die Magnetisierung dreht sich dann in beiden Kugeln gleichzeitig und irreversibel in die entgegengesetzte Gleichgewichtslage ((/>1 = (/>2 = 71:), wobei (/>1 = - (/>2 ist (Fanning-ProzeB von JACOBS und BEAN!, s. Fig. 13e). II. Magnetisierungsprozesse. 14. Problemstellung. Ein ferro- oder ferrimagnetischer Kristall ist in einem starken Magnetfeld H in dessen Richtung (positive Richtung) homogen magneti siert. Bei kontinuierlicher Feldumkehr kehrt sich auch die Magnetisierung M (im allgemeinen teilweise diskontinuierlich) in die entgegengesetzte Richtung urn, wobei der Vorzeichenwechsel von M normalerweise nicht im Feld H =0, sondern erst in einem Gegenfeld He
Structural Research / Strukturforschung
107 In this way the absolute values of the structure factors may be found, not the phases (6. 8). The problem to find these phases is the phase problem. The present article will treat the following topics. At first the description of the ideal crystal will be given in Chap. B. The underlying principles of this description are the concepts of reciprocal lattice, FOURIER synthesis and sym metry. The evaluation of the intensity will then follow in Chap. C and D. Chap. E is concerned with the phase problem and related topics. Though this article treats the analysis of crystal structures, the fundamental concepts for other structures will here be found too. But these topics, and the experimental ...
