🤓 Based on our data, we think this question is relevant for Professor Costanza's class at USF.
Recall: The ratio of octahedral holes to anions in a closest packed array structure is 1:1. Cations occupy the octahedral holes in this structure. Therefore in a closest packed array with octahedral holes, the maximum cation:anion ratio is 1 : 1.
What is the percent by mass of titanium in rutile, a mineral that contains titanium and oxygen, if structure can be described as a closest packed array of oxide ions with titanium ions in one-half of the octahedral holes? What is the oxidation number of titanium?