International
Tables for
Crystallography
Volume H
Powder diffraction
Edited by C. J. Gilmore, J. A. Kaduk and H. Schenk
International Tables for Crystallography (2018). Vol. H, ch. 3.1, p. 239

Figure 3.1.26 

J. P. Cline,a* M. H. Mendenhall,a D. Black,a D. Windovera and A. Heninsa

aNational Institute of Standards and Technology, Gaithersburg, Maryland, USA
Correspondence e-mail:  james.cline@nist.gov

[Figure 3.1.26]
Figure 3.1.26

Δ(2θ) curve using SRM 660b illustrating the peak-position shifts as function of 2θ. The peak positions were determined via a second-derivative algorithm, and Δ(2θ) values (SRM − test) were fitted with a third-order polynomial. Simulated data are from FPAPC and were analysed via the second-derivative algorithm and polynomial fits as per the experimental data.