Question

Scandium oxide crystallizes with the oxide ions in a closed packed array with the the scandium ion in octahedral holes. What fraction of octahedral holes are filled

Answer 1

2/3 fraction of octahedral holes are filled.

Explanation:

Octahedral holes are described as the holes that are signaled by an o that connects three atoms above and below the plane.

These are called octahedral holes because the +ve ions of this o involve the 6 -ve ions that are arranged in an encircling manner across the corners of this hole.

In $SC_{2} O_{3}$, the crystallization of oxide ions with scandium ions

Let n be the no. of oxide ions &

n be the number of octahedral voids

Now,

$SC_{2}^{+} : O_{2}^{-}$

= 2/3 n :n

∵ 2/3

Thus, 2/3 is the fraction.

Learn more: Octahedral holes

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