Thermodynamic properties of microporous crystals for two hydrated borogermanates, K2[Ge(B4O9)]·2H2O and K4[B8Ge2O17(OH)2]

Zhang, Yan; Lei, Shuo; Liu, Zhihong

doi:10.1016/j.jct.2013.01.027

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…Data for some of these properties are presented in Table 3. Although there are few experimental works in which the thermodynamic properties of borogermanates are determined, the data on the values of the standard formation enthalpy for K2B2Ge3O10 and K2B4GeO9•2H2O are given in [16,17] as -3937.1±4.7 kJ•mol -1 and -4560.8 ±3.4 kJ•mol -1 . Since K2B4GeO9•2H2O is a hydrate, the Thermodynamic Difference Rule (TDR) [22][23][24][25] should be used to evaluate the enthalpy of formation of anhydrous K2B4GeO9.…”

Section: Ternary Oxide Compoundsmentioning

confidence: 99%

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Evaluation of thermodynamic properties of alkaline borogermanates and germanosilicates using the regression analysis method

Штенберг¹,

Bychinsky²,

Tupitsyn³

et al. 2020

International Journal of Thermodynamics

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A novel method for calculating the thermodynamic properties of ternary oxides using borogermanates and germanosilicates as examples is proposed. Using regression coefficients obtained for germanates, borates and silicates, the heat capacity, formation enthalpy, entropy and Gibbs free energy of alkaline borogermanates and germanosilicates were calculated. The obtained enthalpy of formation values are in good agreement with experimental data. In the regression equation, the alkaline oxide thermodynamic potential coefficients were found to depend on the class of compound.

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Section: Ternary Oxide Compoundsmentioning

confidence: 99%

“…These compounds are very promising in practical terms due to their luminescent properties. The thermodynamic properties of borogermanates are presented only in two studies [16,17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of thermodynamic properties of alkaline borogermanates and germanosilicates using the regression analysis method

Штенберг¹,

Bychinsky²,

Tupitsyn³

et al. 2020

International Journal of Thermodynamics

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“…Therefore, the investigation of metal-borates structure has been widely conducted. Among all structures, compounds containing [B 4 O 9 ] 6– were also reported. − In addition, although it is easy to construct borosilicate glass, powder, or microcrystals, the reported single crystal structures of borosilicates are rare. One exception is RUB-13, which was reported in 1995 .…”

Section: Introductionmentioning

confidence: 99%

Borosilicate-Based Framework: Synthesis, Single-Crystal Structure Study, and Physical Properties

Dong,

Zhang,

Chen

et al. 2024

Inorg. Chem.

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Herein, we report the synthesis, crystal structure, and optical properties of a metal-free three-dimensional (3D) inorganic covalent framework ((H 2 en)[Si(B 4 O 9 )], named CityU-11, where H 2 en is the abbreviation for ethanediamine). With the assistance of a tiny amount of F − ions and the selection of SiO 2 as Si sources, single crystals of CityU-11 can be successfully prepared under solvothermal conditions. The precise structure information on CityU-11 has been disclosed through both single-crystal X-ray diffraction (SCXRD) and low-dose high-resolution transmission electron microscopy (LD-HRTEM). The SCXRD results showed that CityU-11 crystallized in the noncentrosymmetric space group of Pnn2, while LD-HRTEM suggested that CityU-11 possessed almost the same interplanar distances of 0.6 nm for both ( 200) and (020) crystal planes, which finely matched with the double peaks of 2θ = 15°in the pattern of its powder X-ray diffraction (PXRD). CityU-11 also displayed an interesting optical property with a moderate birefringence of 0.0258@550 nm.

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“…The Navrotsky group has done much work on the thermochemistry of microporous compounds such as zeolites, pure silica, gallosilicate, and alumina-phosphates by using high-temperature calorimetry [3,4]. Our group has reported the thermodynamic properties of several boron-containing microporous materials [5][6][7][8][9]. However, investigation of the thermodynamic properties of the transition metal borates with microporous structure was not reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of microporous materials for two copper borates, MCuB7O12·H2O (M=Na,K)

Zhang

Kong

Wang

et al. 2015

The Journal of Chemical Thermodynamics

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Thermodynamic properties of microporous crystals for two hydrated borogermanates, K2[Ge(B4O9)]·2H2O and K4[B8Ge2O17(OH)2]

Cited by 7 publications

References 10 publications

Evaluation of thermodynamic properties of alkaline borogermanates and germanosilicates using the regression analysis method

Evaluation of thermodynamic properties of alkaline borogermanates and germanosilicates using the regression analysis method

Borosilicate-Based Framework: Synthesis, Single-Crystal Structure Study, and Physical Properties

Thermodynamic properties of microporous materials for two copper borates, MCuB7O12·H2O (M=Na,K)

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