The Landau levels for the π bands of graphite are calculated using the Slonczewski-Weiss-McClure energy-band model. Bohr-Sommerfeld quantization is used to calculate two new types of magnetic energy levels which trigonal warping introduces. The method is valid for any magnitude of γ₃. The trigonal warping introduces off-axis energy extrema near the band edge E₃ and special magnetic energy levels which can exist between these extrema and exhibit an H1/2 dependence. The usual majority Landau levels with an H dependence are found outside the region of these off-axis energy extrema.
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