Thermodynamic and magnetic properties of compounds in the system MeO–Nd2O3–Mo(W)O3 (Me = Mg, Ca, Sr)

Bissengaliyeva, Мira R.; Gogol, Daniil B.; Bespyatov, M.A.; Taimassova, Shynar T.; Bekturganov, N. S.

doi:10.1088/2053-1591/ab3ae3

Cited by 4 publications

(2 citation statements)

References 47 publications

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“…Medians are equal to 219.05 J/(mol × K) and 390.24 J/(mol × K), respectively. These are still within acceptable levels considering materials of similar origin at room conditions. − Concerning previously mentioned HT XRD studies, axial and volumetric expansion coefficients were also extracted, alongside angular dependencies presented in Figures S12 and S13 for BCW and CCWO, respectively. Linear fits suggest match-up to such heating expansion coefficient as suggested in Table .…”

Section: Resultsmentioning

confidence: 99%

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

et al. 2022

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This comprehensive work showcases two novel, rock-salt-type minerals in the form of amphoteric cerium–tungstate double perovskite and ilmenite powders created via a high-temperature solid-state reaction in inert gases. The presented studies have fundamental meaning and will mainly focus on a detailed synthesis description of undoped structures, researching their possible polymorphism in various conditions and hinting at some nontrivial physicochemical properties like charge transfer for upcoming optical studies after eventual doping with selectively chosen rare-earth ions. The formerly mentioned, targeted A 2 BB′X 6 group of compounds contains mainly divalent alkali cations in the form of XII A = Ba 2+ , Ca 2+ sharing, here, oxygen-arranged clusters ( II X = O 2– ) with purposely selected central ions from f-block VI B = Ce 4/3+ and d-block VI B′ = W 4/5/6+ since together they often possess some exotic properties that could be tuned and implemented into futuristic equipment like sensors or energy converters. Techniques like powder XRD, XPS, XAS, EPR, Raman, and FTIR spectroscopies alongside DSC and TG were involved with an intent to thoroughly describe any possible changes within these materials. Mainly, to have a full prospect of any desirable or undesirable phenomena before diving into more complicated subjects like: energy or charge transfer in low temperatures; to reveal whether or not the huge angular tilting generates large enough dislocations within the material’s unit cell to change its initial properties; or if temperature and pressure stimuli are responsible for any phase transitions and eventual, irreversible decomposition.

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Section: Resultsmentioning

confidence: 99%

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

et al. 2022

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“…%, and equimolar quantities of other reagents were taken. Details of the synthesis were described previously . After annealing in a Nabertherm N7/N muffle furnace at the temperatures up to 1423 K, the praseodymium-doped samples of ternary oxides denoted as Ba–La(Pr)–W were synthesized.…”

Section: Experimental Methodsmentioning

confidence: 99%

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)

Bissengaliyeva¹,

Zhakupov

Knyazev

et al. 2019

J. Chem. Eng. Data

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A sol–gel method was used to synthesize barium, lanthanum, and tungsten-based samples doped with praseodymium Ba(La1–x Pr x )2WO7, where x = 0.005 ÷ 0.05. The morphological and elemental analyses of the samples were carried out by electron probe microanalysis. A full-profile refinement of the crystal structure of the compounds belonging to the monoclinic system with the space group P1121/b was carried out. Using the adiabatic calorimetry method, the heat capacity of the samples was measured and the thermodynamic functions in the range of 5–320 K were found. In the heat capacity of the samples below 15 K, anomalies were detected and the excessive and lattice heat capacities were determined.

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Structure and calorimetric study of complex oxides based on lanthanum, tungsten, and alkaline earth elements MeLa2WO7 (Me = Mg, Ca, Sr, Ba)

Bissengaliyeva¹,

Zhakupov

Knyazev

et al. 2020

J Therm Anal Calorim

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Thermodynamic and magnetic properties of compounds in the system MeO–Nd₂O₃–Mo(W)O₃ (Me = Mg, Ca, Sr)

Cited by 4 publications

References 47 publications

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)

Structure and calorimetric study of complex oxides based on lanthanum, tungsten, and alkaline earth elements MeLa2WO7 (Me = Mg, Ca, Sr, Ba)

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Thermodynamic and magnetic properties of compounds in the system MeO–Nd2O3–Mo(W)O3 (Me = Mg, Ca, Sr)

Cited by 4 publications

References 47 publications

Synthesis Attempt and Structural Studies of Novel A2CeWO6 Double Perovskites (A2+ = Ba, Ca) in and outside of Ambient Conditions

Synthesis Attempt and Structural Studies of Novel A2CeWO6 Double Perovskites (A2+ = Ba, Ca) in and outside of Ambient Conditions

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La1–xPrx)2WO7 (x from 0.005 to 0.05)

Structure and calorimetric study of complex oxides based on lanthanum, tungsten, and alkaline earth elements MeLa2WO7 (Me = Mg, Ca, Sr, Ba)

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Thermodynamic and magnetic properties of compounds in the system MeO–Nd₂O₃–Mo(W)O₃ (Me = Mg, Ca, Sr)

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

Synthesis Attempt and Structural Studies of Novel A₂CeWO₆ Double Perovskites (A²⁺ = Ba, Ca) in and outside of Ambient Conditions

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)