📅 NSB Round Robin 2018🎓 HS🔄 Round 12#️⃣ Question 17🌟 Bonus✍️ Short Answer
Identify all of the following three oxide minerals in which all of the iron is in the three plus oxidation state: 1) Ferrihydrite; 2) Magnetite; 3) Goethite.
✔️Answer:1 AND 3
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