Synthesis and characterization of a new iron phosphate KSrFe2(PO4)3 with a langbeinite type structure

Hidouri, Mourad; López, Marı́a Luisa; Pico, C.; Wattiaux, Alain; Amara, Mongi Ben

doi:10.1016/j.molstruc.2012.04.002

Cited by 13 publications

(13 citation statements)

References 18 publications

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“…The phase formation is further confirmed by Rietveld refinement. The refinement was performed by using the atomic coordinates of KSrFe 2 (PO 4 ) 3 3 as a starting model. Figure 2 shows that the refinement patterns are matching well with the calculated patterns.…”

Section: Resultsmentioning

confidence: 99%

“…54 The crystal structures of both of the compounds are isostructure with KSrFe 2 (PO 4 ) 3 . 3 In the structure, lead and potassium atoms are statistically distributed with identical partial occupancies at K1/Pb1 and K2/Pb2 sites located at 4a Wyckoff positions. M (Cr and Fe) atoms take two crystallographically independent sites and form octahedral coordination with oxygens.…”

Section: Resultsmentioning

confidence: 99%

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Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

et al. 2020

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New langbeinite-type phosphates KPbCr 2 (PO 4 ) 3 and KPbFe 2 (PO 4 ) 3 are synthesized by solution method and characterized by powder X-ray diffraction, infrared spectra, thermogravimetric and differential thermal analysis, scanning electron microscope, and energy dispersive X-ray analysis. Rietveld refinement reveals that both of the compounds crystallize in the cubic system with P2 1 3 space group, and the calculated lattice parameters for Cr and Fe phases are 9.7332(2) and 9.8325(7) Å, respectively. The electron micrographs confirm the crystalline nature of the samples from their surface morphologies. Infrared spectra display the characteristic features of P−O and M−O vibrational bands for both of the phases. Thermal analysis of KPbCr 2 (PO 4 ) 3 and KPbFe 2 (PO 4 ) 3 indicates that they are thermally stable up to 1273 K. The axial thermal expansion is studied by high-temperature X-ray diffraction between 298 and 1073 K. The average thermal expansion coefficients of KPbCr 2 (PO 4 ) 3 and KPbFe 2 (PO 4 ) 3 are identified as 8.9 × 10 −6 and 10.8 × 10 −6 K −1 , respectively. Magnetic study reveals both of the compounds follow Curie−Weiss behavior in the higher-temperature region, and antiferromagnetic interactions are dominant.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

et al. 2020

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“…Thus, the early reported results showed that the K 3 Fe 2 (PO 4 ) 3 structure contains PO 4 -tetrahedra, FeO 6 -octahedra, and FeO 5 -polyhedra linked by common corners and forming a 3D network where the K + ions occupy four different positions. 40 According to the reported data, 41 the phosphate KSrFe 2 (PO 4 ) 3 belongs to the langbeinite family of compounds. Its crystal structure consists of a 3D framework resulting from corner-sharing between FeO 6octahedra and PO 4 -tetrahedra.…”

Section: Powder X-ray Diffractionmentioning

confidence: 99%

“…This framework delimits two distinct cavities, statistically occupied by the K + and Sr 2+ ions. 41 Taking this into account, the substitution 2.5 K + → 1.25 Sr 2+ caused the formation also of the langbeinite-type structure that contains vacancies in the potassium positions. and duration of sintering did not change the phase composition of obtained sample.…”

Section: Powder X-ray Diffractionmentioning

confidence: 99%

Synthesis and investigation of langbeinite-related strontium- and iron-containing phosphates

Strutynska¹,

Slobodyanik²,

Shatalova³

2018

Turk J Chem

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The partial substitution of potassium atoms by strontium atoms in initial matrix K 3 Fe 2 (PO 4)3 with formation of complex phosphates K 3−2x Sr x Fe 2 (PO 4)3 (x = 0.75, 1.0, and 1.25) was determined using a solid-state reaction method. According to powder X-ray diffraction (XRD) data, the prepared phosphates with x = 1.0 and 1.25 crystallize in a cubic system (space group P 21 3) and belong to langbeinite family compounds, while for the sample with x = 0.75 a mixture of langbeinite-type phase and a minor amount of K 3 Fe 2 (PO 4)3 was obtained. The decreasing trend of lattice parameter a with increase of Sr amount in the phosphate confirmed the incorporation of strontium in the langbeinite-related structure. The thermal analysis results indicate that the obtained langbeinite-related compounds are stable upon heating and their melting points are higher than 1000°C. It should be noted that the determined ironcontaining phosphates can be obtained at temperature lower than 900°C, which creates a perspective for using them as matrixes for immobilization of radioactive strontium.

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“…After an initial treatment similar to that undertaken for the synthesis of the single crystals until 873K, the sample was subjected to final calcinations at 1273K for 48h with intermittent grinding. Yellowish powder was obtained by quenching in air [8].…”

Section: Ksrfe 2 (Po 4 )mentioning

confidence: 99%

Chemical preparations, crystal data for monophosphates and condensed phosphates associated to strontium and IR studies of their anions

2020

IJETER

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Chemical preparations and main crystallographic data are reported for the Monophosphates and the condensed phosphates associated to strontium. These compounds constituting an important part of phosphate chemistry have been subject to many studies and applications in many fields of research on materials and industry. The subject of this paper is to collect unit-cell parameters of these compounds to build a database of the different formulas which are known until now, to have an idea about their preparations and also about characterization by infrared vibration spectrometry for anions, PO 3 in α-Sr(PO 3 )

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Synthesis and characterization of a new iron phosphate KSrFe2(PO4)3 with a langbeinite type structure

Cited by 13 publications

References 18 publications

Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

Synthesis and investigation of langbeinite-related strontium- and iron-containing phosphates

Chemical preparations, crystal data for monophosphates and condensed phosphates associated to strontium and IR studies of their anions

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Synthesis and characterization of a new iron phosphate KSrFe2(PO4)3 with a langbeinite type structure

Cited by 13 publications

References 18 publications

Langbeinite Phosphates KPbM2(PO4)3(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

Langbeinite Phosphates KPbM2(PO4)3(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

Synthesis and investigation of langbeinite-related strontium- and iron-containing phosphates

Chemical preparations, crystal data for monophosphates and condensed phosphates associated to strontium and IR studies of their anions

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Product

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Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation

Langbeinite Phosphates KPbM₂(PO₄)₃(M = Cr, Fe): Synthesis, Structure, Thermal Expansion, and Magnetic Properties Investigation