File Preview ་ 1. ང4 The crystal structure of MgO may be described as an FCC array of close packed O²- anions with Mg2+ cations at the octahedral sites (the same as the NaCl structure). Given that the ionic radii of O2 and Mg2+ are 0.140 nm and 0.072 nm, respectively, compute the density of MgO assuming ions are in contact along: (i) the unit cell face diagonals and (ii) the unit cell edges. (b) The reported density for MgO is 3.6 g/cm³. Comment on the agreement or disagreement with your results in part (a). Why do you believe one estimate is better than the other.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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་ 1. ང4
The crystal structure of MgO may be described as an FCC array of close packed O²- anions
with Mg2+ cations at the octahedral sites (the same as the NaCl structure). Given that the ionic
radii of O2 and Mg2+ are 0.140 nm and 0.072 nm, respectively, compute the density of MgO
assuming ions are in contact along: (i) the unit cell face diagonals and (ii) the unit cell edges.
(b) The reported density for MgO is 3.6 g/cm³. Comment on the agreement or disagreement
with your results in part (a). Why do you believe one estimate is better than the other.
Transcribed Image Text:File Preview ་ 1. ང4 The crystal structure of MgO may be described as an FCC array of close packed O²- anions with Mg2+ cations at the octahedral sites (the same as the NaCl structure). Given that the ionic radii of O2 and Mg2+ are 0.140 nm and 0.072 nm, respectively, compute the density of MgO assuming ions are in contact along: (i) the unit cell face diagonals and (ii) the unit cell edges. (b) The reported density for MgO is 3.6 g/cm³. Comment on the agreement or disagreement with your results in part (a). Why do you believe one estimate is better than the other.
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