title: Study of two tungstates Ca0.5 Cd0.5 WO4 and Ca0.2 Cd0.8 WO4 by transmission electron microscopy.
abstract: To better understand the role of crystal structures and local disorder in the photonic properties of the system (1 - x)CaWO4  - xCdWO4 with 0 < x < 1, two specific phases with compositions x = 0.5 (scheelite phase) and 0.8 (wolframite phase) have been studied by scanning and transmission electron microscopies. High-resolution electron microscopy images and image simulations, associated with X-ray diffraction data, allowed confirming the lattices and space groups I41 /a and P2/c of the two scheelite and wolframite phases, at the local scale. The electron microscopy data show the existence of a high degree of crystallization associated with statistical distribution of Ca or Cd atoms on a Ca1- x Cdx site in each lattice.
authors.affiliation: Institut Matériaux Microélectronique et Nanosciences de Provence, Aix Marseille Université, CNRS, Université de Toulon, La Garde, France.|Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, Cité Dakhla, Agadir, Maroc.
authors.forename: A
authors.initials: A
authors.lastname: Taoufyq
authors.affiliation: Institut Matériaux Microélectronique et Nanosciences de Provence, Aix Marseille Université, CNRS, Université de Toulon, La Garde, France.
authors.forename: L
authors.initials: L
authors.lastname: Patout
authors.affiliation: Institut Matériaux Microélectronique et Nanosciences de Provence, Aix Marseille Université, CNRS, Université de Toulon, La Garde, France.
authors.forename: F
authors.initials: F
authors.lastname: Guinneton
authors.affiliation: Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, Cité Dakhla, Agadir, Maroc.
authors.forename: A
authors.initials: A
authors.lastname: Benlhachemi
authors.affiliation: Laboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, Cité Dakhla, Agadir, Maroc.
authors.forename: B
authors.initials: B
authors.lastname: Bakiz
authors.affiliation: Institut Matériaux Microélectronique et Nanosciences de Provence, Aix Marseille Université, CNRS, Université de Toulon, La Garde, France.
authors.forename: S
authors.initials: S
authors.lastname: Villain
authors.affiliation: CEA, DEN, Département d'Etudes des Réacteurs, Service de Physique Expérimentale, Laboratoire Dosimétrie Capteurs Instrumentation, Saint-Paul-lez-Durance, France.
authors.forename: A
authors.initials: A
authors.lastname: Lyoussi
authors.affiliation: Société CESIGMA, Signals & Systems, Chemin de La Planquette, La Garde, France.
authors.forename: G
authors.initials: G
authors.lastname: Nolibe
authors.affiliation: Institut Matériaux Microélectronique et Nanosciences de Provence, Aix Marseille Université, CNRS, Université de Toulon, La Garde, France.
authors.forename: J-R
authors.initials: JR
authors.lastname: Gavarri
keywords: Calcium cadmium tungstates; electron microscopy; high-resolution electron microscopy; simulated images; solid solutions