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Perovskite polytypes

Figure 6.5 Network of BOg/2 octahedra in the ABO3 perovskite polytypes, (a) Cubic 3C (b) Hexagonal 2H (c) Hexagonal 6H (d) Hexagonal 4H (e) Rhombohedral 9R [34],... Figure 6.5 Network of BOg/2 octahedra in the ABO3 perovskite polytypes, (a) Cubic 3C (b) Hexagonal 2H (c) Hexagonal 6H (d) Hexagonal 4H (e) Rhombohedral 9R [34],...
Exactly as for MgSiOs, high pressure stabihzes a variety of compositions in the compact perovskite structure. Competition with other structures, such as Umenite, defect pyrochlore, and various polytypes of perovskite, as a function of ionic radius, pressure, and temperature has been reviewed. ... [Pg.1524]

In the case of hexagonal perovskite-like fluorides, only the 2H, 6H, 10H, 9R and 12R arrangements have been found so far [36-38]. Thus, the system CsNiF3-CsCdF3 shows, according to the Ni/Cd ratio, 6H, 10H or 12R polytype... [Pg.65]

Zhdanov symbol (22). Zhdanov symbols are particularly useful when depicting very long, complex polytypes, such as those found in the ZnS and SiC systems, but are less frequently encountered in descriptions of hexagonal perovskites. [Pg.95]

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See also in sourсe #XX -- [ Pg.54 ]



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