Oxygen packing models

Oxygen-Packing Model of AlP0 -5 Structure Containing TPA... 

Figure 17. Oxygen packing model of (A) a unit cell, and (B) several unit cells of zeolite A. Dark balls represent sodium cations in structure.

Fig. 2. Stmcture of the mineral 2eohte chaba2ite is depicted by packing model, left, and skeletal model, right. The sihcon and aluminum atoms He at the corners of the framework depicted by soHd lines. In this figure, and Figure 1, the soHd lines do not depict chemical bonds. Oxygen atoms He near the midpoint of the lines connecting framework corners. Cation sites are shown in three different locations referred to as sites I, II, and III.

Figure 1.1 Atomic representation of a typical 3-dimensional packing model (thickness about 3 A) starting with a single Hyflon AD60X polymer chain. Atom colors gray = carbon, red = oxygen, light blue = fluorine [15].

Figure 5. Modelization of the Al20s/CeAl0s/Ce02 structural relationship along the c-axis of transition alumina [18J. Coherence of the interface results from similarity of oxygen packings and continuity of cations coordination(Al Al20s/CeAl03 and Ce /Ce CeAlOs/Ce02) ...

By using the unsteady-state model, the maximum oxygen penetration depth for highly packed immobilised cells has been reported to be in the range of 50-200 xm. 

For estimation purposes, consider the 7-AI2O3 surface phase to be similar to the bulk structure—a cubic close-packed array of oxygen atoms with aluminum atoms in interstices. With this model there is one AF nucleus of... 

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