 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
journal menu
![[Figure 1]](wh5001fig1mag.jpg)
|
|
Figure 1
(a) A projection of the cubic structure of the metastable HP phase γ-Si(Ge). (b) The substructure of the fictitious V atoms (voids), occupying the 16c site in the bixbyite structure Mn2O3. (c) The same drawing as (b) in which some contacts (bonds) have been eliminated to show clearly how the structure can be decomposed into two three-connected subsets. (d) Perspective view of (c) to emphasize the threefold connection in each subset, which is characteristic of the Group 15 elements (N, P). Note the existence of both tetragonal and octagonal helices, perpendicular to the projection plane. (e) The Al sub-array in Sr3Al2O5Cl2, where the Al atoms are converted into (Ψ-P), forming a (Ψ-P2O5) skeleton. The network is identical to the subsets forming both the HP-Si(Ge) and the V voids in bixbyite. (f) The structure of the high-pressure, high-temperature N to show its similarity with both the Al subarray represented in (e) and the two subsets of HP-Si, represented in (d). |
![[Figure 1]](wh5001fig1.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
