Mössbauer spectroscopy yields decisive information for interpreting x-ray diffraction (XRD) patterns in the case of 'green rusts with intercalated CO32- anions, i.e. the chemical analogs of the three minerals that constitute within the ≪ hydrotalcite ≫ supergroup comprising 44 minerals the "fougèrite" group where the structure stays globally unchanged. The only difference comes from the deprotonation of OH- ions at the apices of the octahedrons occupied by the Fe cations so that FeII ions become FeIII. Low angle x-ray diffraction using synchrotron radiation displays the presence of many polytypes which reflects the stacking of brucite like layers and anion interlayers so that a 2D long range order of anions stays unchanged from fougèrite to mössbauerite.
- Green rust
- Mössbauer spectroscopy
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry