Abstract
Shock recovery experiments for single crystal and powdered specimens of TiO2 with the rutile structure were performed in the pressure range up to 72 GPa. Single crystal specimens were shocked parallel to [100], [110] and [001] directions. X-ray powder diffraction analysis showed that the amount of α-PbO2 type TiO2 produced by shock-loading depended strongly on the shock propagation direction. The maximum yield (about 70%) was observed for shock loading to 36 GPa parallel to the [100] direction. In the [001] shock direction, the yield is much smaller than that of the [100] direction. This anisotropic yield was consistent with the observed anisotropy of the phase transition pressure in shock compression measurements. However, transformation to the α-PbO2 type cannot explain the large volume change observed above about 20 GPa. On the basis of the high pressure behavior of MnF2, we assumed that the high pressure phase was either fluorite or distorted fluorite type and that the phase conversion to the α-PbO2 type was induced spontaneously in the pressure reduction process.
We present a displacive mechanism of phase transition under shock compression from the rutile structure to the fluorite structure, in which the rutile [100] is shown to correspond to the fluorite [001] or [110] and the rutile [001] to the fluorite [110]. Direct evidence is obtained by examining the [100] shocked specimen by high resolution electron microscopy.
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References
Al'tshuler LV, Podurets MA, Simakov GV, Trunin RF (1973) High-density forms of fluorite and rutile. Sov Phys Solid State 15:969–971
German VN, Podurets AM (1982) Shock polymorphism of managnese fluoride. Izv Acad Sci USSR, Phys Solid Earth 18:587–590
Goto T, Syono Y (1984) Technical aspect of shock compression experiments using the gun method. In: Sunagawa I (ed) Materials science of the earth's interior. Terra Scientific Publishing, Tokyo, pp 605–619
Hyde BG, Bursill LA, O'Keeffe M, Andersson S (1972) Continuous topological variation in coordination in crystals: structural relations and possible transition mechanisms. Nature (London) Phys Sci 237:35–38
Kabalkina SS, Vereshchagin LF, Lityagina LM (1969) Polymorphism of MnF2 at high pressure and temperatures. Sov Phys JETP 29:803–806
Kikuchi M, Kusaba K, Bannai E, Fukuoka K, Syono Y, Hiraga K (1985) Observation of shock-induced phases of Nb2O5 single crystal under high-resolution electron microscopy. Jpn J Appl Phys 24:1600–1606
Kusaba K, Syono Y, Kikuchi M, Fukuoka K (1985) Shock behavior of zircon: phase transition to scheelite structure and decomposition. Earth Planet Sci Lett 72:433–439
Kusaba K, Yagi T, Kikuchi M, Syono Y (1986) Structural considerations on the mechanism of the shock-induced zircon-scheelite transition in ZrSiO4. J Phys Chem Solids 47:675–679
Linde RK, deCarli PS (1969) Polymorphic behavior of titania under dynamic loading. J Chem Phys 50:319–325
Lityagina LM, Kabalkina SS, Vereschagin LF (1972) Conditions for the formation and existence of MnF2 phase with α-PbO2 structure. Sov Phys JETP 35:353–354
Liu L (1978) A fluorite isotype of SnO2 and a new modification of TiO2: implications for the earth's lower mantle. Science 199:422–425
Mashimo T, Sawaoka A (1980) Anisotropic behavior of the shock-induced phase transition of rutile phase titanium-dioxide. Phys Lett A 78:419–422
Mashimo T, Nagayama K, Sawaoka A (1983) Anisotropic elastic limits and phase transitions of rutile phase TiO2. J Appl Phys 54:5043–5048
Matsui Y, Kawamura K (1987) Computer-experimental synthesis of silica with the α-PbO2 structure. In: Manghnani MH, Synon Y (eds) High-pressure research in mineral physics. Terra/AGU, Tokyo Washington, pp 305–311
McQueen RG, Jamieson JC, Marsh SP (1967) Shock-wave compression and x-ray studies of titanium dioxide. Science 155:1401–1404
O'Keeffe M (1984) On ten- and eleven coordinated periodic packings of equivalent spheres. Mat Res Bull 19:1433–1436
O'Keeffe M, Hyde BG (1982) Anion coordination and cation packings in oxides. J Solid State Chem 44:24–31
Seifert KF (1968) Untersuchungen zur Druck-Kristallchemie der AX2-Verbindungen. Fortschr Miner 45:214–280
Syono Y (1984) Shock-induced phase transition in oxides and silicates. In: Sunagawa I (eds) Materials science of the earth's interior. Terra Scientific Publishing, Tokyo, pp 395–414
Syono Y, Akimoto S (1968) High pressure synthesis of fluorite-type PbO2. Mat Res Bull 3:153–158
Syono Y, Kusaba K, Kikuchi M, Fukuoka K, Goto T (1987) Shock-induced phase transitions in rutile single crystal. In: Manghnani MH, Syono Y (eds) High-pressure research in mineral physics, edited by. Terra/AGU, Tokyo Washington, pp 385–392
Yagi T, Akimoto S (1980) Phase boundary and transition rate of orthorhombic-cubic transformation in PbO2. J Geophys Res 85:6991–6995
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Kusaba, K., Kikuchi, M., Fukuoka, K. et al. Anisotropic phase transition of rutile under shock compression. Phys Chem Minerals 15, 238–245 (1988). https://doi.org/10.1007/BF00307512
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DOI: https://doi.org/10.1007/BF00307512