Reinvestigation of the binary diagram Na3PO4–FePO4 and crystal structure of a new iron phosphate Na3Fe3(PO4)4

Structural study by X-ray diffraction and Mössbauer spectroscopy of a new synthetic iron phosphate: K4MgFe3(PO4)5

“…Moreover, these materials are of great importance from a fundamental point of view because of their rich structural chemistry owing to the possible (+2/+3) mixed valence of iron and its tendency to adopt 6, 5 and 4 environment polyhedra. Most of the reported structures are built up from isolated FeO 6 , FeO 5 or FeO 4 polyhedra [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], finite clusters of corner-or edge-sharing Fe polyhedra [19][20][21][22][23][24] or infinite chains of edge-sharing FeO 6 octahedra [25][26][27]. The phosphate groups serve as links for the Fe polyhedral units giving rise to a variety of frameworks which, compared to other mineral phosphates [28,29], can be considered among the most complex ones.…”

Structural study and properties of a new iron phosphate Rb9Fe7(PO4)10

“…As an extension of the earlier work, we report here on the synthesis and characterization, by X-ray diffraction Mössbauer spectroscopy and magnetic susceptibility of a new iron phosphate of composition Rb 9 Fe 7 (PO 4 ) 10 . Its main structural feature deals with the presence of Fe 2 O 10 units of corner-sharing FeO 6 and FeO 5 polyhedra.…”

“…As a part of this activity, we recently described the synthesis and characterization of some new alkali iron phosphates belonging to the A 2 O-F 2 O 3 -P 2 O 5 systems [10][11][12][13]. As an extension of the earlier work, we report here on the synthesis and characterization, by X-ray diffraction Mössbauer spectroscopy and magnetic susceptibility of a new iron phosphate of composition Rb 9 Fe 7 (PO 4 ) 10 .…”

The crystal chemistry of iron (III) monophosphates with mono and divalent metallic cations

“…In the structures containing both FeO 6 and FeO 5 polyhdra, these polyhedra can be either isolated or associated in pairs by corner-sharing to form Fe 2 O 10 units. In the remaining structures, containing either FeO 5 or FeO 4 , or both FeO 6 and FeO 4 , these polyhedra are isolated from each other.…”

“…In the remaining structures, containing either FeO 5 or FeO 4 , or both FeO 6 and FeO 4 , these polyhedra are isolated from each other.…”