Authors:
Shao-mei Ma Key Laboratory of New Technology of Chemical and Biological Transformation Processes, College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning 530006, Guangxi, People's Republic of China

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Zeng-wei Huang Key Laboratory of New Technology of Chemical and Biological Transformation Processes, College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning 530006, Guangxi, People's Republic of China

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Sheng-fu Wu College of Pre-education, Guangxi University for Nationalities, Nanning 530006, Guangxi, People's Republic of China

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An-ping Liao Key Laboratory of New Technology of Chemical and Biological Transformation Processes, College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning 530006, Guangxi, People's Republic of China

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Ai-qun Yuan Key Laboratory of New Technology of Chemical and Biological Transformation Processes, College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning 530006, Guangxi, People's Republic of China

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Abstract

Flower-like ammonium cadmium phosphate monohydrate was synthesized by solid-state reaction at low temperature and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, and elemental analysis. The product NH4CdPO4·H2O was obtained with flower-like morphology by the addition of fatty alcohol-polyoxyethylene ether surface-active agent. Based on Hess's law, thermochemical cycle was designed to determine the dissolution enthalpies of reactants and products using a solution-reaction isoperibol calorimeter at 298.15 K, and the molar reaction enthalpy was calculated on the basis of above dissolution enthalpies. With the aid of other auxiliary thermodynamic data, the standard molar formation enthalpy of the title compounds was concluded:

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  • 2. Le, So-Nhu, Navrotsky, A 2008 Energetics of formation of alkali and ammonium cobalt and zinc phosphate frameworks. J Solid State Chem 181:2029 .

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  • 4. Nieves, B, Claudio, A, Jose, AS, Beatriz, R, Aranzazu, E, Jose, RG 2006 Calorimetric determination of the effect of ammonium-iron(II) phosphate monohydrate on rhodic eutrudox erazilian soil. Thermochim Acta 441:8995 .

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  • 6. Koleva, VG 2007 Vibrational behavior of the phosphates ions in dittmarite-type compounds M′M″PO4·H2O (M′ = K+, NH4 +; M″ = Mn2+, Co2+, Ni2+). Spectrochim Acta A 66:413418 .

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  • 7. Yin, P, Liu, JS, Wang, YJ, Tang, QH, Yu, ZX, Zhang, Y, Lv, XF 2007 Solid state synthesis of ammonia cadmium phosphate with special morphology at room temperature. Chem Eng (china) 35:5355.

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  • 8. Yuan, AQ, Wu, J, Bai, LJ, Ma, SM, Huang, ZY, Tong, ZF 2008 Standard molar enthalpies of formation for ammonium/3d-transition metal phosphates NH4MPO4·H2O (M = Mn2+, Co2+, Ni2+, Cu2+). J Chem Eng Data 53:10661070 .

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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