Thermodynamic properties for calcium molybdate, molybdenum tri-oxide and aqueous molybdate ion

Morishita, Masao; Kinoshita, Yoshiki; Houshiyama, Hiroki; Nozaki, Ai; Yamamoto, Hiroaki

doi:10.1016/j.jct.2017.05.021

Cited by 22 publications

(25 citation statements)

References 82 publications

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“…In our previous study, 11) the deviation, U devi ðC p;m Þ, between the data obtained by the adiabatic calorimetry and the relaxation calorimetry for Cu below 30 K and CaMoO 4 at 50300 K. U devi ðC p;m Þ was found to be 2.2% below 40 K; 0.86% at 50 K; 0.27% at 100 K; 0.09% at 150 K; 0.24% at 200 K; 0.32% at 250 K; 0.04% at 298.15 K.…”

Section: Low Temperature C P;mmentioning

confidence: 84%

“…In our previous studies, 1017) thermodynamic properties for the end members of the yellow phases MgMoO 4 , 10) CaMoO 4 (cr), 11) SrMoO 4 (cr), 10,12) BaMoO 4 (cr), 10,13) Sm 2 (MoO 4 ) 3 (cr); 14) Ag 2 MoO 4 (cr); 15) their component MoO 3 (cr); 11) and their aqueous species MoO 4…”

Section: ¹mentioning

confidence: 93%

“…Where mathematical expression of the Debye-Einstein formula to fit the experimental C p;m data was investigated. 1017) The Á f G m data for the relevant molybdates FeMoO 4 , 1820) NiMoO 4 , 21) ZrMo 2 O 8 , 2225) Th 2 MoO 8 , 26,27) and UMoO 6 28,29) were assessed 10,11) by the present authors based on their experimental values. 1828) The measurements 1017) and assessments 10,11) have been done as parts of the OECD NEA Mo TDB project.…”

Section: ¹mentioning

confidence: 95%

“…The thermodynamic values for the relevant molybdates were revised based on the updated standard entropy at 298. 15 with them for MgMoO 4 , 10) CaMoO 4 (cr), 11) SrMoO 4 (cr), 10,12) BaMoO 4 (cr), 10,13) FeMoO 4 , 10,11) NiMoO 4 , 10) Ag 2 MoO 4 (cr), 15) ZrMo 11) and UMoO 6 . 11) Felmy et al 44) measured solubility of Nd 2 (MoO 4 ) 3 • XH 2 O(cr) into water.…”

Section: +1mentioning

confidence: 97%

“…(aq); 10,11,16) the elemental molybdenum 14) were investigated. Where mathematical expression of the Debye-Einstein formula to fit the experimental C p;m data was investigated.…”

Section: ¹mentioning

confidence: 99%

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Thermodynamic Properties for Nd2(MoO4)3 Formed in the Nuclear Fuel Waste Glasses

et al. 2019

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The thermodynamic properties for Nd 2 (MoO 4) 3 were investigated. Nd 2 (MoO 4) 3 is one of the end member of the yellow phases which are known as hygroscopic harmful phases in the nuclear fuel waste glasses. The standard molar entropy, Á T 0 S m , at 298.15 K of Nd 2 (MoO 4) 3 was determined by measuring its isobaric heat capacities, C p;m , from 2 K via the fitting functions including the Debye-Einstein formula and electronic-as well as magnetic terms. The Neel temperature, T N , estimated by extrapolating the magnetic-term in the fitting function. Its standard Gibbs energy of formation, Á f G m , was determined by combining Á T 0 S m datum with the standard enthalpy of formation, Á f H m , which were estimated from ones for Ce 2 (MoO 4) 3 and Sm 2 (MoO 4) 3. The unknown standard Gibbs energy of solution, Á sol G m , at 298.15 K of Nd 2 (MoO 4) 3 was predicted from the reference data for MoO 4 2¹ (aq) and Nd 3+ (aq). The obtained thermodynamic values are as follows: Á T 0 S m (Nd 2 (MoO 4) 3 (cr), 298.15 K)/(J K ¹1 mol ¹1) = 439.29 « 4.39 Á f G m (Nd 2 (MoO 4) 3 (cr), 298.15 K)/(kJ mol ¹1) = ¹4072.13 « 6.14 Á sol G m (Nd 2 (MoO 4) 3 , 298.15 K)/(kJ (mol of MoO 4 2¹ (aq)) ¹1) = 73.12 « 2.33 T N /K = 1.55 « 0.16 The data obtained in the present work are expected to be useful for geochemical simulations of the diffusion of radioactive elements through underground water.

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Section: Low Temperature C P;mmentioning

confidence: 84%

Section: ¹mentioning

confidence: 93%

Section: ¹mentioning

confidence: 95%

Section: +1mentioning

confidence: 97%

“…(aq); 10,11,16) the elemental molybdenum 14) were investigated. Where mathematical expression of the Debye-Einstein formula to fit the experimental C p;m data was investigated.…”

Section: ¹mentioning

confidence: 99%

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Thermodynamic Properties for Nd2(MoO4)3 Formed in the Nuclear Fuel Waste Glasses

et al. 2019

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Molybdenum

Klipsch

Aveyard²,

Carey

et al. 2023

Patty's Toxicology

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Molybdenum is an essential element for humans, animals, and plants. But excess exposure to molybdenum substances may cause harmful effects. This chapter describes natural occurrence, production, uses, and chemical and biochemical properties of molybdenum substances, and possible adverse effects in relation to dose. The emphasis is on commercial inorganic molybdenum substances and those where the molybdate ion [MoO 4 ] 2− is the driver for a biological effect.

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