Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

if molecular formulae is A2B then find the percentage of octahedral and tetrahedral voids if cations A are equally distributed between octahadral and tetrahedral voids and anions B are in CCP. kindly reply quick a request.
Asked by Farooq Ahmad Shah | 01 Jun, 2015, 08:15: PM
answered-by-expert Expert Answer
In the given CCP lattice, anions B are in CCP.
In a CCP structure, the number of octahedral voids = number of atoms and number of tetrahedral voids = 2 × number of octahedral voids.

Effective number of atom in CCP = 4 = octahedral void 
octahedral void × 2 = tetrahedral void = 8 

Hence, if 1 A is in tetrahedral void while 1 A is in octahedral void. 
Thus for each tetrahedral void, there will double octahedral viods are filled.
That means for 4 octahedral voids, 8 tetrahedral voids are occupied.
Hence, octahedral voids are 100% occupied while tetrahedral voids are 50% occupied.
Answered by Prachi Sawant | 04 Jun, 2015, 10:55: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Chemistry
what is the efficiency power of Fcc unit cell
Asked by shreyasingh3652 | 28 May, 2022, 11:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
cation A occupies 2/3rd of all the octahedral voids while the anion B is found in all lattice points predict the formula of the ionic compound formed by them
Asked by shrinithishri2003 | 22 Jun, 2021, 12:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
where is exam decoded in this topic?!!!!
Asked by siddikparamban | 01 Apr, 2020, 01:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Unit cell consists of a cube in which anions(B)  are present at each corner and cations (A) at the centre of the alternate face of the unit cell what is the simplest formula of the compound
Asked by prasadranjan46 | 05 May, 2018, 10:54: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
explain conduction band theory brifly ?
Asked by gargimoitreyee | 12 Mar, 2018, 11:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is the percentage of space occupied by the spheres in hexagonal close packing in two dimensions?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is co-ordination number?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is the co-ordination number of atoms in BCC, HCP, CCP and simple lattices?
Asked by Topperlearning User | 17 Jun, 2016, 10:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
An element exists as hexagonal close packed structure as well as cubic close packed structure. In which case the element would have higher density?
Asked by Topperlearning User | 17 Jun, 2016, 10:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
In AB2O4, the oxide ions are placed in cubic close packed lattice, cation A is present in tetrahedral voids and cations B are present in octahedral voids. What is the percentage of tetrahedral and octahedral voids occupied by A and B respectively?
Asked by Topperlearning User | 17 Jun, 2016, 10:51: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×