 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 1]](bk0051fig1mag.jpg)
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Figure 1
Representation down the b axis (a) at 200 K, (b) at 163 K and (c) at 20 K. The view is from infinity, so that one H(F) atom of each ion is hidden. Only the ions near the plane y = 0.25 are shown. The unit cell at 163 and 20 K is shifted by (0.125 0.0 0.0) to correspond to the unit cell at 200 K. Ellipsoids are shown at 50% probability (Johnson, 1976  ). The larger ellipsoids correspond to the H atoms of the cations. |
![[Figure 1]](bk0051fig1.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
