Details

Autor(en) / Beteiligte

• Clemens, Oliver
• Haberkorn, Robert
• Springborg, Michael
• Beck, Horst Philipp

Titel

Neutron and X-ray diffraction studies on the high temperature phase of Mn3(VO4)2, the new isostructural compound NaMn4(VO4)3 and their mixed crystals NaxMn4.5−x/2(VO4)3 (0≤x≤1)

Ist Teil von

• Journal of solid state chemistry, 2012-10, Vol.194, p.409-415

Ort / Verlag

Amsterdam: Elsevier Inc

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This paper presents a detailed structure analysis (combined Rietveld analysis of X-ray and neutron powder diffraction data as well as quantum mechanical calculations) of the high temperature phase of Mn3(VO4)2 (space group I4¯2d). Special attention is directed to the analysis of the local coordination around Mn2+ ions or vacancies within a stella quadrangula configuration of anions. Furthermore, the new compound NaMn4(VO4)3 is described as well as a range of mixed crystals between NaMn4(VO4)3 and Mn3(VO4)2 (described by the formula NaxMn4.5-x/2(VO4)3, 0≤x≤1) which were synthesized by a solid state route. All compounds were shown to be isostructural to the high temperature phase Mn3(VO4)2. The crystal structure of the new compound NaMn4(VO4)3. [Display omitted] ► We present neutron and X-ray diffraction studies on high temperature-Mn3(VO4)2. ► Structural details of partly filled stellae quadrangulae positions are discussed. ► Refined structural parameters and theoretical calculations are compared. ► We investigate the mixed crystal system Mn3(VO4)2–NaMn4(VO4)3.