addenda and errata\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 1600-5767

Anisotropic diffraction peak broadening and dislocation substructure in hydrogen-cycled LaNi5 and substitutional derivatives. Erratum

aLaboratoire de Cristallographie, Université de Genève, 24 Quai E. Ansermet, 1211 Genève 4, Switzerland, and bLaboratoire de Chimie Métallurgique des Terres Rares, CNRS, 2–8 rue Henri Dunant, 94320 Thiais CEDEX, France
*Correspondence e-mail: radovan.cerny@cryst.unige.ch

(Received 24 January 2002; accepted 28 January 2002)

An erroneous equation and some consequently underestimated values of dislocation densities in the paper by Černý et al. [J. Appl. Cryst. (2000), 33, 997–1005 ] are corrected.

In the paper by Černý et al. (2000)[Černý, R., Joubert, J.-M., Latroche, M., Percheron-Guégan, A. & Yvon, K. (2000). J. Appl. Cryst. 33, 997-1005.], equation (4) on page 998 was erroneously interpreted and used in the calculations. The correct equation is

[A = [1 - \ln (\ln P)/(4 \ln P)]^{-1 }.]

The only consequence of this error is that some values of the dislocation densities as given in Table 2 and Fig. 3 of that paper are slightly underestimated. Correct values of the dislocation densities for all studied compounds are given in Table 1[link] herein. The value for LaNi5 is, however, still lower by one order of magnitude than the value determined for the same compound by Wu et al. (1998)[Wu, E., Kisi, E. H. & Gray, E. MacA. (1998). J. Appl. Cryst. 31, 363-368.].

Table 1
Corrected dislocation densities

Compound ρ (1011 cm−2)
LaNi5 3.8 (4)
LaNi4.25Co0.75 3.9 (3)
LaNi3Co2 0.52 (4)
LaNi4.6Mn0.4 2.7 (3), P = 3
LaNi4Mn 3.8 (3), P = 3
LaNi4.9Al0.1 1.6 (1)
LaNi4.7Al0.3 0.29 (5), P = 3
LaNi3.85Co0.75Mn0.4 0.62 (9), P = 3
LaNi3.95Co0.75Al0.3 0.045 (7), P = 3
LaNi4.3Mn0.4Al0.3 1.1 (1), P = 3
LaNi3.94Co0.36Mn0.4Al0.3 1.7 (3), P = 3
LaNi3.55Co0.75Mn0.4Al0.3 0.17 (1), P = 3
LaNi4Fe 1.7 (1)
LaNi4Cu 0.35 (4), P = 3
LaNi4.5Sn0.5 0.06 (1), P = 3
La0.5Ce0.5Ni5 5.1 (6)
LaNi5.2 3.0 (1)

References

First citationČerný, R., Joubert, J.-M., Latroche, M., Percheron-Guégan, A. & Yvon, K. (2000). J. Appl. Cryst. 33, 997–1005.  Web of Science CrossRef IUCr Journals Google Scholar
First citationWu, E., Kisi, E. H. & Gray, E. MacA. (1998). J. Appl. Cryst. 31, 363–368.  Web of Science CrossRef CAS IUCr Journals Google Scholar

© International Union of Crystallography. Prior permission is not required to reproduce short quotations, tables and figures from this article, provided the original authors and source are cited. For more information, click here.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
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