Abstract
It is observed that radial streak patterns of double Bragg scattering appear in the small-angle X-ray scattering from highly oriented pyrolytic graphite (HOPG). The intensity profile of double Bragg scattering from an HOPG sample is calculated theoretically. Assuming that the c axes of the graphite crystallites in the HOPG sample are distributed around an orientation vector and their distribution function has a Gaussian form, it is found that the intensity profile of double Bragg scattering is expressed by a double Gaussian function of the scattering angle and the azimuthal angle of the streak. The calculated intensity profile is compared with the experimental one. The method developed in this article can be used to estimate the orientational distribution of crystallites in uniaxial polycrystalline materials.
| Original language | English |
|---|---|
| Pages (from-to) | 681-698 |
| Number of pages | 18 |
| Journal | Acta Crystallographica Section A: Foundations and Advances |
| Volume | 74 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2018 Nov |
Keywords
- HOPG
- double Bragg scattering
- highly oriented pyrolytic graphite
- intensity profiles
- small-angle X-ray scattering
ASJC Scopus subject areas
- Structural Biology
- Biochemistry
- Materials Science(all)
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry