New Zirconium Phosphate Fluorides: Hydrothermal Synthesis and Crystal Structures

Hydrothermal synthesis and characterization of microporous crystals of trivalent metal-containing zirconium phosphates

“…1 that the XRD patterns of both compounds is very similar, we therefore assume that the structure of FeZrPO-8 is identical to that of AlZrPO-8 although the nature of trivalent metal ion incorporated is different. In contrast to the powder X-ray patterns of the known phases of zirconium fluorophosphate, the as-synthesized materials proved to be a new phase, which are different from the previously reported zirconium fluorophosphates [10].…”

“…If NH 4 F is omitted from the reaction mixtures, only amorphous metal phosphate is obtained. Due to the use of fluoride, recently a series of fluorine-containing zirconium [10,11] or titanium [12] phosphates were obtained. In addition, the formation of the title compounds has been shown sensitive to the organic templates.…”

Open-Framework Inorganic Materials

“…[191] However, the fluoride route has very recently led to the first zirconium phosphates with three-dimensional open-framework structures. [192,193] 2 O exhibits 8-ring tunnels formed by strict Zr ± P alternation. The Zr octahedra are of two types: ZrO 6 and ZrO 5 F, the ZrÀF bond being terminal.…”

Dimensional reduction in zirconium phosphate; from layers to ribbons to chains

“…Although these methods can provide access to new structures, the results are often difficult to predict. 18,35 In contrast, the synthesis of a-and c-ZrP is generally carried out using mild conditions and low temperatures, by first complexing Zr(IV) with fluoride ions and then leaving these complexes to thermally decompose in a phosphate solution.…”

“…[9][10][11] As with aluminophosphates, the extensive application of hydrothermal synthesis methods and the use of amine templating agents, often in non-aqueous solvents, has led to the recent preparation of several new phases with different structures: one-dimensional chains, [12][13][14] new layered compounds, 13,[15][16][17][18][19] and even open-framework 3-D solids. 17,18,20 In these new compounds, the introduction of fluorine atoms and/or other monodentate terminal groups into the zirconium coordination sphere enlarged the number of accessible structures. Unlike hydrothermal synthesis, in which high temperatures and pressures are used, the method of precipitation of zirconium phosphates by thermal decomposition of zirconium fluorocomplexes (HF method), traditionally used for the preparation of a-and c-ZrP, and their organic derivatives, is carried out using mild conditions and low temperatures.…”