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Pramana

, Volume 3, Issue 6, pp 370–376 | Cite as

Effect of crystal and collimator misalignments on Bragg angle measurements

  • V K Wadhawan
Experimental Techniques

Abstract

A mathematical analysis has been made of the combined effect of crystal and collimator misalignments on Bragg angles measured from zero-layer Weissenberg photographs. The results obtained here have been compared with those available for Bond’s method of measuring Bragg angles with diffractometers. The comparison shows that, for a given amount of crystal and collimator misalignments, Bond’s method and the 2 θ-method do not give identical results for small and intermediate Bragg angles.

Keywords

Lattice parameter determination Bragg angle measurements crystal and collimator misalignments 

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References

  1. Beu K E 1967 inHandbook of X-rays ed. E F Kaelble (New York: McGraw-Hill)Google Scholar
  2. Bond W L 1960Acta Crystallogr. 13 814CrossRefGoogle Scholar
  3. Buerger M J 1942X-ray Crystallography (New York: Wiley)Google Scholar
  4. Burke J and Tomkeieff M V 1968Acta Crystallogr. A24 683Google Scholar
  5. Todhunter I 1859Spherical Trigonometry (Revised by J G Leathem, 1901 pp. 110–111 (London: MacMillan)Google Scholar
  6. Wadhawan V K 1972Report BARC/I-186, 3rd edition. Bhabha Atomic Research Centre, Bombay. (Program CELPAR, No. 193 inWorld List of Crystallographic Computer Programs (1973), ed. G C Bassi. Included inJ. Appl. Crystallogr. 19736 309Google Scholar
  7. Wadhawan V K 1973Indian J. Phys. 47 74Google Scholar
  8. Walder V and Burke J 1971J. Appl. Crystallogr. 4 337CrossRefGoogle Scholar
  9. Weisz O, Cochran W and Cole W F 1948Acta Crystallogr. 1 83CrossRefGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1974

Authors and Affiliations

  • V K Wadhawan
    • 1
  1. 1.Neutron Physics SectionBhabha Atomic Research CentreBombay

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