 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 8]](je5050fig8mag.jpg)
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Figure 8
Three-dimensional electron diffraction patterns of α-P.O.13. The projections of the reciprocal volume are shown on the left hand side; the cuts through the reciprocal space representing the main crystallographic zones are shown on the right side. The small square denotes the reciprocal unit cell of the original unit-cell setting, which is discussed here. (a) View of the reciprocal space along a*; empty circles mark rows of missing h0l reflections for odd l. (b) [100] zone pattern as a section from the reciprocal space; dashed lines mark rows of extinct reflections with the reflection condition 0kl: k = 2n; empty circles mark rows of missing h0l reflections, as in (a). (c) View of the reciprocal space along c*. The empty circles mark rows of missing reflections in the 0kl zone with reflection condition: k = 2n. (d) [001] zone as a slice from the reciprocal volume. Empty circles denote missing 0k0 reflections. The diamonds mark extinct reflections, which correspond to the unit cell of the average structure with aav* = 2a* with the reflection condition havkav0: hav + kav = 2n. (e) View of the reciprocal volume along b*. (f) [010] zone as a slice from the reciprocal space; dashed lines represent extinctions of every second line in the h0l plane with the reflection condition l = 2n. A possible extinction of h00 reflections is not visible, due to the missing cone of reflections parallel of the electron beam. |
![[Figure 8]](je5050fig8.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
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