Predict the coordination number of ca2+in cao crystal and also its crystal structure
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coordination number of Ca2+ in CaO will be 6.
Though I don't know about second part.
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Hello buddy,
● Answer -
CN of Ca2+ = 6
CaO => FCC structure
● Explaination -
- In CaO crystal, Ca2+ is a cation and O2- is an anion.
- Cationic (Ca2+) radius is 100 pm and anionic (O2-) radius is 145 pm.
Ratio of cationic/anionic radius is -
r+/r- = 100 / 145
r+/r- = 0.69
As 0.414 < 0.69 < 0.732, CaO will form FCC lattice.
Coordination number in FCC lattice is 6, therefore CN of Ca2+ must be 6.
Hope this cleared your queries.
● Answer -
CN of Ca2+ = 6
CaO => FCC structure
● Explaination -
- In CaO crystal, Ca2+ is a cation and O2- is an anion.
- Cationic (Ca2+) radius is 100 pm and anionic (O2-) radius is 145 pm.
Ratio of cationic/anionic radius is -
r+/r- = 100 / 145
r+/r- = 0.69
As 0.414 < 0.69 < 0.732, CaO will form FCC lattice.
Coordination number in FCC lattice is 6, therefore CN of Ca2+ must be 6.
Hope this cleared your queries.
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