Abstract
Wollastonite transforms to a triclinic high-pressure polymorph, wollastonite II, at pressures > 25 kb. The equilibrium boundary [P(bars)=-4.7×T°C+32.810] has a rather flat negative P-T slope. The rapid reactivity of the transition over at least a 1000° C range, its insensitivity to T and its location around 30 kb are indicative of its potential for a pressure calibration curve at high T.
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Coe, R. S.: Thermodynamic effect of shear stress on the ortho-clino inversion in enstatite and other coherent phase transitions characterized by a finite simple shear. Contr. Mineral. and Petrol. 26, 247–264 (1970)
Essene, E. J.: Petrogenesis of Franciscan metamorphic rocks. Ph.D. thesis, Department of Geology, Univ. of Calif., Berkeley, 1966
Fyfe, W. S., Verhoogen, J.: In: W. S. Fyfe, Turner, J. Verhoogen, Metamorphic reactions and metamorphic facies. Geol. Soc. Am. Mem. 73, 259 pp. (1958)
Green, T. H., Ringwood, A. E., Major, A.: Friction effects and pressure calibration in a piston-cylinder apparatus at high pressure and temperature. J. Geophys. Res. 71, 3589–3594 (1966)
Ito, T., Ozawa, T., Takeda, H.: Wollastonite structure. Proc. Jap. Acad. 47, 190–192 (1971)
Ito, T., Sadanaga, R., Takenchi, Y., Tokonami, M.: Existence of partial mirrors in wollastonite. Proc. Jap. Acad. 45, 913–918 (1969)
Jefferson, D. A., Brown, M. G.: Polytypism and stacking disorder in wollastonite. M.s. submitted to Nature (1973)
Kushiro, I.: Wollastonite-pseudowollastonite inversion. In: Ann. Rept. Dir. Geophys. Lab. Carn. Inst. 1963–1964, pp. 83–84 (1964)
Peacock, M. A.: On wollastonite and parawollastonite. Am. J. Sci. 30, 495 (1935)
Ringwood, A. E., Major, A.: Some high-pressure transformations of geophysical importance. Earth Planet. Sci. Letters. 2, 106–110 (1967)
Robie, R. A., Waldbaum, D. R.: Thermodynamic properties of minerals and related substances at 298.15 K and 1 atm. pressure and at higher temperatures U.S. Geol. Surv. Bull. 1259, 218–219 (1968)
Shimada, K., Komaki, T., Kawasaki, J., Fukushige, Y.: Wollastonite deposit at Kiura, Oita Pref., Japan. Yogto Kyokai Shi 79, 251–258 (1971) (Jap.). Chem. Abst. 75, 78998
Skinner, B. J.: Thermal expansion. In: Handbook of physical constants, revised edition, S. J. Clark, Ed., p. 87 (1966)
Sobolev, N. V., Jr., Kuznetsova, I. K., Zyuzin, N. I.: The petrology of grospydite zenoliths in the Zagadochnaya kimberlite pipe in Yakutia. J. Petrol. 9, 253–280 (1968)
Strens, R. G. J.: Symmetry-entropy-volume relationships in polymorphism. Mineral. Mag. 36, 565–577 (1967)
Trojer, F. J.: The crystal structure of parawollastonite. Z. Krist. 127, 291–308 (1968)
Trojer, F. J.: The crystal structure of a high-pressure form of CaSiO3. Z. Krist. 130, 185–206 (1969)
Wenk, H. R.: Polymorphs of wollastonite. Contr. Mineral. and Petrol. 22, 238–247 (1969)
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Contribution No. 317 from the Mineralogical Laboratory, Department of Geology and Mineralogy, The University of Michigan.
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Essene, E. High-pressure transformations in CaSiO3 . Contr. Mineral. and Petrol. 45, 247–250 (1974). https://doi.org/10.1007/BF00383442
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DOI: https://doi.org/10.1007/BF00383442