1. Akaogi M, Kusaba K, Susaki J-I, Yagi T, Matsui M, Kikegawa T, Yusa H, Ito E (1992) High-pressure high-temperature stability of αPbO2-type TiO2 and MgSiO3 majorite: calorimetric and in situ X-ray diffraction studies. In: Syono Y, Manghnani MH (eds) High-pressure research: application to Earth and planetary sciences. TERRAPUB American Geophysical Union, Washington, DC, pp 447–455
2. Bendeliany NA, Popova SV, Vereschagin LF (1966) A new modification of titanium dioxide stable at high pressure. Geokhimiya 1966:499–502
3. Bose K, Ganguly J (1995) Quartz-coesite transition revisited—reversed experimental—determination at 500–1200 °C and retrieved thermochemical properties. Am Mineral 80:231–238
4. Dachille F, Simons PY, Roy R (1968) Pressure-temperature studies of anatase, brookite, rutile and TiO2-II. Am Mineral 53:1929–1939
5. Dubrovinsky LS, Dubrovinskaia NA, Swamy V, Muscat J, Harrison NM, Ahuja R, Holm B, Johansson B (2001) Materials science: the hardest known oxide. Nature 410:653–654