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(b) Copper nitride Cu3N adopts the ReO3 structure in the cubic space group Pm3m with a = 3.814 Å. The fractional coordinates of N and Cu are 0,0,0 and 0.5,0,0, respectively. (i) Describe the structure of Cu3N in terms of close packing. (ii) Sketch the structure of Cu3N. (iii) What are the coordination numbers of Cu and N in this structure?

(b) Copper nitride Cu3N adopts the ReO3 structure in the cubic space group Pm3m with a = 3.814 Å. The fractional coordinates of N and Cu are 0,0,0 and 0.5,0,0, respectively. (i) Describe the structure of Cu3N in terms of close packing. (ii) Sketch the structure of Cu3N. (iii) What are the coordination numbers of Cu and N in this structure?

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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(b) Copper nitride Cu3N adopts the ReO3 structure in the cubic space group Pm3m with a = 3.814 Å. The fractional coordinates of N and Cu are 0,0,0 and 0.5,0,0, respectively. (i) Describe the structure of Cu3N in terms of close packing. (ii) Sketch the structure of Cu3N. (iii) What are the coordination numbers of Cu and N in this structure? (iv) What type of centring, if any, does the structure of Cu3N show? (iv) Calculate the Cu-N bond distance. (v) Given that the ionic radii of Cu" and N³- are 0.77 Å and 1.46 Å, respectively, comment on the nature of the Cu-N bond.
Transcribed Image Text:(b) Copper nitride Cu3N adopts the ReO3 structure in the cubic space group Pm3m with a = 3.814 Å. The fractional coordinates of N and Cu are 0,0,0 and 0.5,0,0, respectively. (i) Describe the structure of Cu3N in terms of close packing. (ii) Sketch the structure of Cu3N. (iii) What are the coordination numbers of Cu and N in this structure? (iv) What type of centring, if any, does the structure of Cu3N show? (iv) Calculate the Cu-N bond distance. (v) Given that the ionic radii of Cu" and N³- are 0.77 Å and 1.46 Å, respectively, comment on the nature of the Cu-N bond.
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