Rare Earths

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Editors: J. D. Dunitz, Ziirich P. Hemmerich, Konstanz • R. H. Holm, Cambridge J. A. Ibers, Evanston • C. K. J~rgensen, Gen~ve J. B. Neilands, Berkeley • D. Reinen, Marburg R. J. P. Williams, Oxford

With 36 Figures

Springer-Verlag New York Heidelberg Berlin 1975

ISBN 0-387-07268-3 Springer-Verlag New York Heidelberg Berlin ISBN 3-540-07268-3 Springer-Verlag Berlin Heidelberg New York Library of Congress Catalog Card Number 67-11280 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. Under ~ 54 of the German Copyright Law where copies ate made for other then for private use, a fee is payable to the publisher, the amount of the fee to be determined by agreement with the publisher. © by Springer-Verlag Berlin Heidelberg 1975 Printed in Germany The use of general descriptive names, trade marks, etc. in this publication, even if the former are not especially identlfled, is not to be taken as a sign that such names, as understood by the Trade Marks and Merchandise Marks Act, may accordingly be used freely by anyone. Typesetting and printing: Meister-Druck, Kassel. Bookbinding: BrSblscbe lJniversit~tsdruckerei, Giegen

Contents

The Lanthanide Ions as Structural Probes in Biological and Model Systems Evert Nieboer Partly Filled Shells Constituting Anti-bonding Orbitals with Higher Ionization Energy than their Bonding Counterparts Christian Klixbiill J0rgensen

49

The Intensities of Lanthanide f ~-~ f Transitions Robert D. Peacock

83

Radiative and Non-Radiative Transitions of Rare-Earth Ions in Glasses Renata Reisfeld

123

STRUCTURE AND BONDING is issued at irregular intervals, according to the material received. With the acceptance for publication of a manuscript, copyright of all countries is vested exclusively in the publisher. Only papers not previously published elsewhere should be submitted. Likewise, the author guarantees against subsequent publication elsewhere. The text should be as clear and concise as possible, the manuscript written on one side of the paper only. Illustrations should be limited to those actually necessary.

Manuscripts will be accepted by the editors: Professor Dr. Jack D. Dunitz

Laboratorium fiir Organische Chemie der Eidgen/Sssischen Hochschule CH-8006 Ztirich, Universit/itsstraBe 6]8

Professor Dr. Peter Hemmerich

Universitiit Konstanz, Fachbereich Biologie D-7750 Konstanz, Postfach 733

Professor Richard 1t. Holm

Department of Chemistry, Massachusetts Institute of Technology Cambridge, Massachusetts 02139/U.S.A.

Professor James A. Ibers

Department of Chemistry, Northwestern University Evanston, Illinois 60201/U.S.A.

Professor Dr. C. Klixbiill Jergensen

51, Route de Frontenex, CH-1207 Gen6ve

Professor Joe B. Neilands

University of California, Biochemistry Department Berkeley, California 94720]U.S.A.

Professor Dr. Dirk Reinen

Fachbereich Chemie