L.D. Calvert - Böcker

In the past the aim of Structure Reports has been to present critical reports on all work of crystallographic structural interest, whether it is derived directly from X-ray, electron or neutron diffraction, or even indirectly from other experiments. The reports were intended to be critical and not mere abstracts, except in some cases when a brief indication of the content of a paper of related interest was included in the form of an abstract. In selecting topics for reporting, the criterion " of structural interest" was freely inter­ preted in terms of what was topically interesting. However, the amount of literature covering matters of structural interest has become so large that this policy can no longer be followed. From Volume 28 onwards, critical reports are only given on actual structure determinations. That is to say reports are only written on papers recording the determination of the positions of the atoms in structures. Nevertheless, Volumes 28 to 30 still do record much information on lattice parameters and space groups of the structures of alloys and compounds, although in the form of tables. From Volume 31 onwards, even this information is generally omitted and only full structure determinations are reported. One of the reasons for this omission is that such data are obtainable from the continuing volumes of Crystal Data.

Starting with Volume 30, 1965, Structure Reports is produced in a new format by photo-offset printing from typed manuscript with unjustified lines. At the time when the decision for this change was taken, the cost of setting the manuscript in type was becoming so high as to render the cost of individual subscription pro­ hibitive. At that time automatic typing methods giving justified lines, etc. for photo-offset reproduction did not offer any saving over type setting, but hand typing of the manuscripts could give a considerable saving in production costs. In the belief that a publication that is too expensive to buy is of little value, the format has been changed sacrificing elegance to availability. The new format does not lead to increased length of the volumes since the information content of the typed and typeset pages is practically identical. How­ ever, the amount of work to be reported demands the eventual separation of Structure Reports into two volumes, A. Metals and Inorganic and B. Organic. It was convenient to introduce this change also at Volume 30, and with Volume 31 further to restrict the publication of crystal data, so that from 1966 onwards the reports deal almost entirely with complete structure determinations only. In the past the aim of Structure Reports has been to present critical reports on all work of crystallographic structural interest, whether it is derived directly from X-ray, electron or neutron diffraction, or even indirectly from other experiments.

The present volume continues the aim of Structure Reports to present critical accounts of all crystallographic structure determinations. The increase in the number of crystal structure papers (now about 2000 per year in the Organic Section) has prompted a minor change in format, which increases the information density per page, hopefully without any loss of clarity. Details of the arrangement in the volumes, symbols used etc. are given in previous volumes (e.g. 41B or 42A, pages vi-viii). University of British Columbia 1. TROTIER Vancouver, Canada 15 July 1978 [VI] STRUCTURE REPORTS SECTION I METALS Edited by L. D. Calvert (National Research Council of Canada) with the assistance 0/ J.K.Byron F.L.Lee YuWang [1] 2 ARRANGEMENT As in previous volumes the arrangement in the Metals section is approximately, but not strictly, alphabetical, and to find particular substances the subject index or formula index should be used. 3 ALKALINE-EARTH ANTIMONIDES and BISMUTHIDES A B. A B (A = Ba. Sr; B = Bi. Sb) 2 5 3 B. EISENMANN and K. DELLER. 1975. Z. Naturf .• 30B. 66-72. A2B. Tetragonal. La2Sb type (1). I4/mmm. Z = 4. Mo radiation. photographic data. Atoms are placed A(l) in 4(c):-0.1/2.0; A(2) and B in 4(e): O.O.z. ASB3. Hexagonal. MnSSi3 type (2). P63/mcm. Z = 2. Mo radiation. diffractometer data. Atoms are placed A(l) in-4(d): 1/3.2/3.0; A(2) and B in 6(g): x.0.l/4.

The present volurne continues the aim of Structure Reports to present critical accounts of all crystallographic structure detenninations. Details of the arrangement in the volumes, symbols used etc. are given in previous volumes (e.g. 41B or 42A, pages vi-viii). University of British Columbia J. TROTTER Vancouver, Canada 30 June 1981 [VI] STRUCTURE REPORTS SECTION I METALS Edited by L. D. Calvert (National Research Council of Canada) with the assistance of 1. K. Byron [1] 2 ARRANGEMENT As in previous volumes the arrangement in the Metals section is approximately, but not strictly, alphabetical, and to find particular substances the subject index or formula index should be used. 3 ALUMINUM BERYLLIUM BORON Al~1.lB22Be~0.8 I. HIGASHI, 1980. J. Solid State ehern., ~, 201-212. Tetragonal, P43212, a = 10.168, c = 14.262 A, c/a = 1.40, Dm = 2.5, Z = 8. Mo radi- ation, R = 0.055 for 2253 reflexions, diffractometer data. 31 site-sets are given. Four crysta1s were studied.