English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Perovskites La 1 − x Sr x Mn 1−x Fe x O 3+δ  (x = 0.1 - 0.5) were prepared by a freeze-drying method and for comparison by conventional solid state reaction. Freeze-dried precursors are more reactive, forming the final perovskites at lower temperatures and within shorter reaction times. Under the reaction conditions employed (air atmosphere, 800 - 1350 °C), the perovskite La 0.9 Sr 0.1 Mn 0.9 Fe 0.1 O 3  was obtained in an orthorhombic modification. By annealing under oxygen at 800 °C, however, a rhombohedral modification La 0.9 Sr 0.1 Mn 0.9 Fe 0.1 O 3.1  with an excess oxygen content can be prepared. The structures of the other perovskites of the series (x = 0.2 - 0.5) were refiṉed on the assumption of a rhombohedral distortion of the ideal perovskite structure (space group R3c). There are characteristic correlations between composition of samples, volume and distortion of the AO 12-  and BO 6 -polyhedra in the ABO 3  structure.

Zur Kenntnis rhomboedrischer Perowskite (La,Sr)(Mn,Fe)O 3 /Contributions to the Chemistry of Rhombohedral Perovskites (La,Sr)(Mn,Fe)O 3