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Although the Hume-Rothery rules apply strictly only to metals, the concept of similarity of cations corresponds to the complete solubility of NiO in MgO (shown in the figure below). NP+ Mg+ Random, substitutional solid solution of NiO in MgO. The O2- arrangement is unaffected. The substitution occurs among Ni+ and Mg2+ ions. Calculate the percent difference between cation sizes in this case. Express your answer to three significant figures. VO AEO It vec ? The percent difference is %.

Although the Hume-Rothery rules apply strictly only to metals, the concept of similarity of cations corresponds to the complete solubility of NiO in MgO (shown in the figure below). NP+ Mg+ Random, substitutional solid solution of NiO in MgO. The O2- arrangement is unaffected. The substitution occurs among Ni+ and Mg2+ ions. Calculate the percent difference between cation sizes in this case. Express your answer to three significant figures. VO AEO It vec ? The percent difference is %.

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Although the Hume-Rothery rules apply strictly only to metals, the concept of similarity of cations corresponds to the complete solubility of NiO in MgO (shown in the figure below). 02- Mg2+ Random, substitutional solid solution of NiO in MgO. The O2- arrangement is unaffected. The substitution occurs among Ni?+ and Mg2+ ions. Calculate the percent difference between cation sizes in this case. Express your answer to three significant figures. Vol AEO It vec The percent difference is %. Submit Request Answer
Transcribed Image Text:Although the Hume-Rothery rules apply strictly only to metals, the concept of similarity of cations corresponds to the complete solubility of NiO in MgO (shown in the figure below). 02- Mg2+ Random, substitutional solid solution of NiO in MgO. The O2- arrangement is unaffected. The substitution occurs among Ni?+ and Mg2+ ions. Calculate the percent difference between cation sizes in this case. Express your answer to three significant figures. Vol AEO It vec The percent difference is %. Submit Request Answer
One way to determine a structural defect model (such as that shown in the figure below for a solid solution of Al2 O3 in MgO) is to make careful density measurements. O2- AP+ Mg2+ o Vacancy A substitutional solid solution of Al½O3 in MgO is not as simple as the case of NiO in MgO. The requirement of charge neutrality in the overall compound permits only two Al+ ions to fill every three Mg²+ vacant sites, leaving one Mg²+ vacancy. What would be the percent change in density for a 5 mol % solution of Al2 O3 in MgO (compared with pure, defect-free MgO)? Express your answer to three significant figures. TVo AEO vec The percent change in density would be %. 國
Transcribed Image Text:One way to determine a structural defect model (such as that shown in the figure below for a solid solution of Al2 O3 in MgO) is to make careful density measurements. O2- AP+ Mg2+ o Vacancy A substitutional solid solution of Al½O3 in MgO is not as simple as the case of NiO in MgO. The requirement of charge neutrality in the overall compound permits only two Al+ ions to fill every three Mg²+ vacant sites, leaving one Mg²+ vacancy. What would be the percent change in density for a 5 mol % solution of Al2 O3 in MgO (compared with pure, defect-free MgO)? Express your answer to three significant figures. TVo AEO vec The percent change in density would be %. 國
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