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Pseudobrookite structure

In this structure there is octahedral coordination of the B ions, but the coordination of A is unusual. It can be described either as a highly deformed octahedron or as a distorted tetrahedron, for in Fe2Ti05 Fe has four neighbours at a mean Fe-0 distance of 1-92 A and two more at 2-30 A. Ti has six octahedral neighbours as in the forms of Ti02, FeTi03, Al2TiOs also has the pseudobrookite structure for TisOs see p. 466. [Pg.498]

Another example lies in the development of cordierite, a desirable and stable refractory, low-thermal-expansion crystal in the Si02—AI2O3—MgO system. Here a reaction occurs between metastable phases, spinel, a-quartz, and the nucleating titanate (pseudobrookite structure) to produce cordierite and rutile as follows ... [Pg.192]

Titanate Pigments Colored Rutile, Priderite, and Pseudobrookite Structured Pigments... [Pg.55]

I 6 Titanate Pigments Colored Rutile, Priderite, and Pseudobrookite Structured Pigments Table 6.6 Lattice parameter changes (vs. pureTiOj) in DR pigments. [Pg.70]

In their study of spinels, Navrotsky and Kleppa (1967b, 1968) paid particular attention to the variation of the distribution of cations between octahedral and tetrahedral sites. They observed a change in enthalpy of solution upon heating a natural MgAl20i spinel and proposed a simple model to describe the thermodynamics of disordering. Navrotsky (1975) has applied a similar model to compounds having the pseudobrookite structure. An important consequence of massive cation disorder is the stabilization of such... [Pg.6]


See other pages where Pseudobrookite structure is mentioned: [Pg.333]    [Pg.11]    [Pg.120]    [Pg.128]    [Pg.466]    [Pg.498]    [Pg.75]    [Pg.617]    [Pg.55]    [Pg.55]    [Pg.264]   
See also in sourсe #XX -- [ Pg.498 ]




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Pseudobrookite crystal structure

The pseudobrookite structure, A2BO

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