Boron and Carbon FamilyHard
Question
If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium
ions m and n respectively, are -
ions m and n respectively, are -
Options
A.
B.
C.
D.
Solution
Effective number of O-2 = 4
Effective number of Al+3 = 4 m
Effective number of Mg+2 = 8 m
⇒ By charge balance 12 m + 16 n = 8
3 m + 4 n = 2
Possible value of m and n from given equation are
m =
; n = 
Effective number of Al+3 = 4 m
Effective number of Mg+2 = 8 m
⇒ By charge balance 12 m + 16 n = 8
3 m + 4 n = 2
Possible value of m and n from given equation are
m =
; n = Create a free account to view solution
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