A mineral crystallizes in a cubic closest packed array of oxygen ions with aluminum ions in some of the octahedral holes and magnesium ions in some of the tetrahedral holes. Deduce the formula of this mineral, and predict the fraction of octahedral holes and tetrahedral holes that are filled by the various cations.
Answer to relevant QuestionsPerovskite is a mineral containing calcium, titanium, and oxygen. The following diagrams represent the unit cell. a. What is the formula of perovskite? b. An alternative way of drawing the unit cell of perovskite has calcium ...A plot of ln(Pvap) versus 1/T (K) is linear with a negative slope. Why is this the case? A substance has the following properties: Sketch a heating curve for the substance, starting at 250oC. In each of the following groups of substances, pick the one that has the given property. Justify each answer. a. highest boiling point: CCl4, CF4, CBr4 b. lowest freezing point: LiF, F2, HCl c. lowest vapor pressure at 25oC: ...The melting point of a fictional substance X is 225oC at 10.0 atm. If the density of the solid phase of X is 2.67 g/cm3 and the density of the liquid phase is 2.78 g/cm3 at 10.0 atm, predict whether the normal melting point ...
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