Modulated Structures--1979 (Kailua Kona, Hawaii)

1979 American Institute Acta Cryst alloys amplitude analysis annealed antiphase antiphase boundaries APB's approximation axis Brillouin zone calaverite calculated Chem cluster commensurate composition modulation compounds Copyright 1979 American corresponding CuAu cubic defects density diffraction pattern diffuse scattering dimensional direction disordered displacement distortion elastic electron diffraction electron microscopy experimental factor Fermi surface Fourier free energy function hexagonal high resolution HRTEM incommensurate Institute of Physics intensity interaction intergrowth ISSN Japan lattice imaging layers long period microscope Mineral mode modulated structure modulation wave monoclinic neutron observed obtained octahedra ordered structures orthorhombic oxides pair parameters peaks phase transition phonon Phys plagioclase range reciprocal space satellite reflections shear plane shown in Fig shows Solid space group spots stacking struc subcell superlattice superstructure symmetry TCNQ temperature dependence tetragonal tion transformation TTF-TCNQ ture twin unit cell vacancies values wave vector wavelength X-ray