1. Akaogi M, Ross NL, McMillan P, Navrotsky A (1984) The Mg2SiO4 polymorphs (olivine, modified spinel and spinel)-thermodynamic properties from oxide melt solution calorimetry, phase relations, and models of lattice vibrations. Am Mineral 69:499?512
2. Akimoto S, Fujisawa H, Katsura T (1965) The olivine-spinel transition in Fe2SiO4 and Ni2SiO4. J Geophys Res 70:1969?1977
3. Akimoto S, Fujisawa H (1968) Olivine-spinel solid solution equilibrium in the system Mg2SiO4-Fe2SiO4. J Geophys Res 15:1467?1479
4. Akimoto S, Matsui Y, Syono Y (1976) High-pressure crystal chemistry of orthosilicates and the formation of the mantle transition zone. The Physics and Chemistry of Minerals and Rocks. Strens RGJ (ed) J Willey & Son, New York, pp 327?363
5. Anderson DL (1977) Composition of the mantle and core. Ann Rev Earth Planet Sci 5:179?202