A compound AB2 possess CAF2 type crystal structure- write coordination no of A2- and B-Coordination no of each type of ions in rock salt type crystal structure

Calcium fluoride has cubic structure, where each Ca2+ ion (cation) is surrounded by eight F ion and each F ion (anion) is surrounded by four Ca2+ ions. So the ...

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Standard X

Chemistry

Formation of NaCl Lattice

A compound AB...

Question

A compound AB₂possess CAF₂type crystal structure. write coordination no of A²⁺ and B^-
Coordination no of each type of ions in rock salt type crystal structure

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Solution

Calcium fluoride has cubic structure, where each Ca²⁺ ion (cation) is surrounded by eight F^- ion and each F^- ion (anion) is surrounded by four Ca²⁺ ions. So the coordination number of Ca²⁺is eight and coordination number of F^- is four.
Therefore in case of AB₂ (which have similar crystal structure with CaF₂), coordination number of A²⁺ is eight and coordination number of B^- is four.

Rock salt has cubic crystal structure. Here Na⁺ and Cl^- have FCC (Face Centered Cubic) structure. Both cation and anion is surrounded by six oppositely charged ions. So the coordination number of each Na⁺ (cation) and Cl^- (anion) is six.

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A compound AB2 possess CAF2 type crystal structure. write coordination no of A2+ and B-Coordination no of each type of ions in rock salt type crystal structure

A compound AB₂possess CAF₂type crystal structure. write coordination no of A²⁺ and B^-
Coordination no of each type of ions in rock salt type crystal structure