Incommensurate Phases in Dielectrics

Preface. Part IV. Results for Specific Systems. 10. Phase transformations in K 2 SeO 4 and structurally related insulators (J.D. Axe, M. Iizumi and G. Shirane). 11. Phenomenology of incommensurate phases in A 2 BX 4 family (Y. Ishibashi). 12. Incommensurate phases in an aromatic molecular crystal: biphenyl (H. Cailleau). 13. Incommensurate phase in NaNO 2 (D. Durand, F. Denoyer, R. Currat and M. Lambert). 14. Modulated phases in thiourea (F. Denoyer and R. Currat). 15. Incommensurate phase in B-ThBr 4 (R. Currat, L. Bernard and P. Delamoye). 16. The incommensurate phase of quartz (G. Dolino). 17. Incommensurate phase of barium sodium niobate (J.C. Toledano, J. Schneck and G. Errandonea). 18. The incommensurate phase of Na 2 CO 3 (P.M. de Wolff and F. Tuinstra). 19. Statics and dynamics of incommensurate BaMnF 4 (J.F. Scott). 20. Unique incommensurate-commensurate phase transitions in a layer-structure perovskite (R. Kind and P. Muralt). 21. Incommensurate structures in liquid crystals (S.A. Pikin). Appendix. List of incommensurate crystals (A.U. Sheleg and V.V. Zaretskii). Author index. Subject index. Cumulative index.