Physics and Chemistry of Minerals

, Volume 35, Issue 1, pp 11–16

Order parameter coupling in leucite: a calorimetric study

  • Helen Newton
  • Stuart A. Hayward
  • Simon A. T. Redfern
Original Paper

Abstract

The thermal anomalies associated with the Ia3dI41/acdI41/a transition sequence of phase transitions in leucite have been studied by differential scanning calorimetry and interpreted with Landau theory. Both transitions are close to the tricritical point. The coupling between the two transitions is biquadratic, and reduces the stability of the I41/a phase.

Keywords

Leucite Calorimetry Phase transitions 

References

  1. Bayer G (1973) Thermal expansion of new leucite-type compounds. Naturwissenshaften 60:102–103Google Scholar
  2. Boysen H (1990) Neutron scattering and phase transitions in leucite. In: Salje EKH (ed) Phase transitions in ferroelastic and co-elastic materials. Cambridge University Press, Cambridge, pp 334–349Google Scholar
  3. Carpenter MA, Salje EKH, Graeme-Barber A (1998) Spontaneous strain as a determinant of thermodynamic properties for phase transitions in minerals. Eur J Mineral 10:621–691Google Scholar
  4. Deer WA, Howie RA, Wise WS, Zussman J (2004) Rock-forming minerals: volume 4B. Framework silicates, silica minerals, Feldspathoids and zeolites, 2nd edn. Geological Society, London, 958 ppGoogle Scholar
  5. Dove MT (1997) Theory of displacive phase transitions in minerals. Am Mineral 82:213–244Google Scholar
  6. Faust GT (1963) Phase transition in synthetic and natural leucite. Schweiz Mineral Petrograph Mitteil 43:165–195Google Scholar
  7. Galli E, Gottardi G, Mazzi E (1978) The natural and synthetic phases with the leucite framework. Mineral Petrograph Acta 22:185–193Google Scholar
  8. Grögel T, Boysen H, Frey F (1984) Neutron powder investigation of I41/aIa3d in leucite. Coll Abst 13th Int Cong Cryst C256–C257Google Scholar
  9. Hayward SA, Romero FJ, Gallardo MC, del Cerro J, Gibaud A, Salje EKH (2000) Cubic–tetragonal phase transition in KMnF3: excess entropy and spontaneous strain. J Phys: Condens Matt 12:1133–1142CrossRefGoogle Scholar
  10. Lange RA, Carmichael ISE, Stebbins JF (1986) Phase transitions in leucite (KAlSi2O6), orthorhombic KAlSiO4, and their iron analogues (KFeSi2O6, KFeSiO4). Am Mineral 71:937–945Google Scholar
  11. Mazzi F, Galli E, Gottardi G (1976) The structure of tetragonal leucite. Am Mineral 61:108–115Google Scholar
  12. Palmer DC (1990) Phase transitions in leucite. PhD thesis, University of CambridgeGoogle Scholar
  13. Palmer DC, Salje EKH, Schmahl WW (1989) Phase transitions in leucite: X-ray diffraction studies. Phys Chem Minerals 16:714–719CrossRefGoogle Scholar
  14. Palmer DC, Bismayer U, Salje EKH (1990) Phase transitions in leucite: order parameter behaviour and the Landau potential deduced from Raman spectroscopy and birefringence studies. Phys Chem Minerals 17:259–265Google Scholar
  15. Palmer DC, Dove MT, Ibberson RI, Powell BM (1997) Structural behavior, crystal chemistry, and phase transitions in substituted leucite: high-resolution neutron powder diffraction studies. Am Mineral 82:16–29Google Scholar
  16. Peacor DR (1968) A high temperature single crystal diffractometer study of leucite (K,Na)AlSi2O6. Zeit Krist 127:213–224CrossRefGoogle Scholar
  17. Salje E, Devarajan V (1986) Phase transitions in systems with strain-induced coupling between two order parameters. Phase Trans 6:235–248CrossRefGoogle Scholar
  18. Salje EKH, Hayward SA, Lee WT (2005) Phase transitions: structure and microstructure. Acta Cryst 61:3–18Google Scholar
  19. Taylor D, Henderson CMB (1968) The thermal expansion of the leucite group of minerals. Am Mineral 53:1476–1489Google Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Helen Newton
    • 1
  • Stuart A. Hayward
    • 1
  • Simon A. T. Redfern
    • 1
  1. 1.Department of Earth SciencesUniversity of CambridgeCambridgeUK

Personalised recommendations