Displacive phase transition in anorthoclase: The "plateau effect" and the effect of T1-T2 ordering on the transition temperature

American Mineralogist

Volumn 81, Issue 11-12, 1996, Pages 1332-1336

  Hayward, Stuart A ^a   Salje, Ekhard K H ^a  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

SILICON; SILICON COMPOUNDS; TEMPERATURE; X RAY POWDER DIFFRACTION;

COMPOSITIONAL CHANGES; DISPLACIVE PHASE TRANSITIONS; LANDAU THEORY; MIXING BEHAVIORS; MODEL-BASED OPC; MONOCLINIC SYMMETRY; NON SYMMETRIES; STRAIN FIELDS;

ALUMINUM COMPOUNDS;

ANORTHOCLASE; LANDAU THEORY; ORDERING; PHASE TRANSITION; PLATEAU EFFECT; TRANSITION TEMPERATURE;

EID: 0030404286     PISSN: 0003004X     EISSN: None     Source Type: Journal    
DOI: 10.2138/am-1996-11-1204     Document Type: Article

References (19)

1. Brown, W.L., and Parsons, I. (1994) Feldspars in igneous rocks. In I. Parsons, Ed., Feldspars and their reactions (NATO ASI C421), p. 449-500. Kluwer, Dordrecht, the Netherlands.
2. Carpenter, M.A. (1988) Thermochemistry of Al/Si ordering in feldspar minerals. In E.K.H. Salje, Ed., Physical properties and thermodynamic behavior of minerals (NATO ASI C225), p. 265-323. Reidel, Dordrecht, the Netherlands.
3. Carpenter, M.A., and Salje, E.K.H. (1994) Thermodynamics of nonconvergent cation ordering in minerals: III. Order parameter coupling in potassium feldspar. American Mineralogist, 79, 1084-1098.
4. Dove, M.T., Giddy, A.P., and Heine, V. (1991) Rigid unit mode model of displacive phase transitions in framework silicates. Transactions of the American Crystallographic Association, 27, 65-74.
5. Harrison, R.J., and Salje, E.K.H. (1994) X-ray diffraction study of the displacive phase transition in anorthoclase, grain-size effects and surface relaxations. Physics and Chemistry of Minerals, 21, 325-329.
6. Iiyama, J.T., and Volfinger, M. (1976) A model for trace-element distribution in silicate structures. Mineralogical Magazine, 40, 555-564.
7. Kroll, H., Bambauer, H.-U., and Schirmer, U. (1980) The high albite-monalbite and analbite-monalbite transitions. American Mineralogist, 65, 1192-1211.
8. Kroll, H., Schmiemann, I., and von Cölln, G. (1986) Feldspar solid solutions. American Mineralogist, 71, 1-16.
9. Kroll, H., and Ribbe, P.H. (1987) Determining (Al,Si) distribution and strain in alkali feldspars using lattice parameters and diffraction-peak positions: A review. American Mineralogist, 72, 491-506.
10. Megaw, H.D. (1974a) The architecture of feldspars. In W.S. MacKenzie and J. Zussman, Eds., The feldspars, p. 2-24. Manchester University Press, Manchester, U.K.
11. _(1974b) Tilts and tetrahedra in feldspars. In W.S. MacKenzie and J. Zussman, Eds., The feldspars, p. 87-113. Manchester University Press, Manchester, U.K.
12. Newton, R.C., and Wood, B.J. (1980) Volume behavior of silicate solid solutions. American Mineralogist, 65, 733-745.
13. Okamura, F.P., and Ghose, S. (1975) Analbite → monalbite transition in a heat treated amelia albite. Contributions to Mineralogy and Petrology, 50, 211-216.
14. Ribbe, P.H. (1983) Aluminum-silicon order in feldspars; domain textures and diffraction patterns. In Mineralogical Society of America Reviews in Mineralogy (2nd edition), 2, 21-55.
15. Salje, E.K.H. (1985) Thermodynamics of sodium feldspar: I. Order parameter treatment and strain induced coupling effects. Physics and Chemistry of Minerals, 12, 93-98.
16. _(1995) Chemical mixing and structural phase transitions: The plateau effect and oscillatory zoning near surfaces and interfaces. European Journal of Mineralogy, 7, 791-806.
17. Salje, E.K.H., Kuscholke, B., Wruck, B., and Kroll, H. (1985) Thermodynamics of sodium feldspar: II. Experimental results and numerical calculations. Physics and Chemistry of Minerals, 12, 99-107.
18. 3. Acta Crystallographica, B49, 387-392.
19. 4 x = 0-0.2. Terra Abstracts, 7, 79.