Environmental Engineering Reference
In-Depth Information
Figure 5.8
Deviation from stoichiometry (δ) as a function of the more volatile compo-
nent [Ref. 10].
4.
Vacancies and misplaced atoms for the same type of atom (V
M
M
O
),
5.
Interstitial and misplaced atoms (O
i
M
O
), and
6.
O
i
, anti-Schottky).
Of these, the types 1 and 2 are known as Schottky and Frenkel disorders,
respectively. As yet they are the only ones found to be important in inorganic
compounds for which they are illustrated below.
Schottky Disorder
A stoichiometric crystal with Schottky disorder contains equivalent concentration
of cation and anion vacancies. Such type of disorder in a compound (MX) is
Interstitial atoms (M
i
