Chemical Forums

Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: AussieKenDoll on April 03, 2019, 06:07:02 AM

Title: Formula of the solid of a cubic closet packing arrangement?
Post by: AussieKenDoll on April 03, 2019, 06:07:02 AM

In a crystalline solid, anion C is arranged in a cubic closed packing arrangement. Cations A occupy 50% of the tetrahedral holes and cations B occupy 75% of the octahedral holes.What is the formula of the solid?
How do I find the answer for this kind of question?

Title: Re: Formula of the solid of a cubic closet packing arrangement?
Post by: mjc123 on April 03, 2019, 08:06:45 AM

You need to know what the cubic close-packed structure looks like, and how many octahedral and tetrahedral holes it has per atom. Can you find, in a textbook or online, a diagram of the unit cell of a ccp structure, and see how many octahedral and tetrahedral holes it has?