What class of mineral forms when the element O is bonded with a metal, as in the mineral hematite? 
Definitions:
Hippocampal Volume
The size of the hippocampus, a brain structure important for memory and spatial navigation, which can be indicative of cognitive health or decline.
Posttraumatic Stress Disorder
A psychiatric disorder that can occur in people who have experienced or witnessed a traumatic event, characterized by flashbacks, nightmares, and severe anxiety.
Behavioral Changes
Modifications or adjustments in human behavior, which can result from psychological interventions, environmental factors, or personal decisions.
Depressed Person
A person suffering from depression, a mental health disorder characterized by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life.
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