TY - RPRT TI - Molecular orbital (SCF-X-α-SW) theory of Fe 2+- Mn 3+ , Fe 3+- Mn 2+ , and Fe 3+- Mn 3+ charge transfer and magnetic exchange in oxides and silicates AU - David M. Sherman PY - 1990 UR - https://pubs.usgs.gov/publication/70016192 ID - 70016192 ER -