Photoacoustic Spectra of Pr3+, Nd3+, Gd3+ Acetate Complexes

Yugeng, Zhang; Qinde, Su; Zhao, Genping

doi:10.1002/crat.2170280723

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…Most oxalate compounds have shown to exhibit interesting applications such as precipitation agent [6], precursor for superconductive oxides [7], nano particles synthesis [8,9], magnetic and luminescent devices [10][11][12]. In addition, microporous oxalate materials have open-framework structure and are layered with honeycomb like apertures [13].…”

Section: Introductionmentioning

confidence: 99%

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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Single crystals of barium oxalate monohydrate (BaC 2 O 4 .H 2 O, BOM) were grown in pure form by controlled diffusion of Ba 2+ using the gel technique at different temperatures. Starting from aqueous Ba 2+ chloride (BaCl 2 ) and acetic acid (C 2 H 2 O 4 ) in gel, this method offers a low-cost and an easiest alternative to other preparation methods for the production of barium oxalate bulky single crystals. The optimal conditions for the growth of BOM crystals in silica gel were found by investigating different growth parameters such as gel pH, gel aging and crystallization temperature. Irrespective of all such crystallization environments, growth rate of the crystals were initially less and then exhibited supersaturation effect leading to non-linearity. Gel aging and temperature has profound effect on nucleation density that resulted less number of crystals of maximum size in the gel matrix. Perfect single crystals were grown on gels of higher pH. The macropore morphology and porosity was controlled by changing age of the gel. It has been found that temperature has a fabulous effect in controlling the nucleation density by altering the supersaturation conditions for the formation of critical nuclei. The entire growth kinetics informed that the grown crystals were derived by the one dimensional diffusion controlled process.

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Section: Introductionmentioning

confidence: 99%

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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“…Rare earth compounds have drawn the attention of material scientists and gained recognition due to their intriguing physical, magnetic and luminescent properties [1][2][3][4][5][6]. Among various rare earth compounds, the oxalate family of rare earth stands out because of their applications.…”

Section: Introductionmentioning

confidence: 99%

Microwave studies on double rare earth oxalate crystals

Elizabeth

Joseph

Paul

et al. 2005

Materials Science and Engineering: A

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“…The interesting physical properties of rare earths have drawn the attention of material scientists (Eyring 1964) and a variety of materials containing rare earths have gained recognition for their magnetic and luminescent properties (Kotru and Raina 1986;Galczynski and Strek 1991;Zhang Yugeng et al 1993). The ionic conductivity of rare earth oxalates [R2(C204)3"nH20 ] (R=Nd, Pr, Sm,..) has initiated much interest besides its easy conversion into the corresponding oxides (Mohan Rao and Jagannatha 1991).…”

Section: Introductionmentioning

confidence: 99%

Some structural aspects of neodymium praseodymium oxalate single crystals grown in hydro silica gels

1997

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The mixed crystals of neodymium praseodymium oxaiate are grown by the diffusion of a mixture of aqueous solutions of neodymium nitrate and praseodymium nitrate (as an upper reactant) into the set gel embedded with oxalic acid. By varying the concentration (by volume) of rare earth nitrates in the upper reactant, the incorporation of Nd and Pr in the mixed crystals has been studied. Tabular crystals with the well defined hexagonal basal planes are observed in the mixed crystals of varying concentrations. X-ray diffraction patterns of these powdered samples reveal that these mixed crystals are 'isostructural', while IR and FTIR spectra establish the presence of oxalate groups. TGA and DSC analyses show the correctness of the chemical formula for the mixed crystals, by the release of water molecules (endothermic) and of CO and CO2 (exothermic), with the rare earth oxides as the stable residue. X-ray fluorescence (XRF) and energy dispersive X-ray analyses (EDAX) establish the presence of heavy rare earth elements qualitatively and to a good extent quantitatively. X-ray photoelectron spectroscopic (XPS) studies confirm the presence of rare earth elements (Nd and Pr) as their respective oxides. The findings of these techniques of characterization are in excellent agreement with the proposed empirical structure for the mixed rare earth oxalates. The implications are discussed.

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Photoacoustic Spectra of Pr³⁺, Nd³⁺, Gd³⁺ Acetate Complexes

Cited by 8 publications

References 11 publications

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Microwave studies on double rare earth oxalate crystals

Some structural aspects of neodymium praseodymium oxalate single crystals grown in hydro silica gels

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