Novel barium triel/tetrelides with the structure type

Dürr, Ines; Schwarz, Michael; Wendorff, Marco; Röhr, Caroline

doi:10.1016/j.jallcom.2009.12.176

Cited by 11 publications

(9 citation statements)

References 34 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In spite of the extensive prior experimental work in the system Ba-Ga-Sn [11][12][13][14][15][19][20][21][22][23][24] In addition, thermal analysis of pure type-I Ba 8 Ga 16-x Sn 30+x clathrate suggests that it decomposes above 500 °C, confirming the DSC results reported by Takabatake et al [14,27]. However, temperature dependent in-situ powder X-ray diffraction reveals that the degradation of the sample begins at much lower temperature, ca.…”

Section: Synthesis and Thermal Analysismentioning

confidence: 99%

Ternary Compounds in the Sn-Rich Section of the Ba–Ga–Sn System: Ba8Ga16–xSn30+x (1.1 ≤ x ≤ 2.8) Clathrates of Type-I and Type-VIII, and BaGa2–xSn4+x (x ≈ 0.2) with a Clathrate-like Structure

et al. 2011

View full text Add to dashboard Cite

Systematic syntheses in the Ba-Ga-Sn system confirmed the existence of a new ternary phase BaGa 1.79 Sn 4.21(2) (EuGa 2 Ge 4 structure type; orthorhombic space group Cmcm, Pearson symbol oS28) with lattice parameters a = 4.5383(6) Å, b = 12.2486(16) Å, c = 14.3747(19) Å. The structure is best viewed as an open-framework based on tetrahedrally coordinated Sn/Ga atoms with Ba atoms enclosed in the voids within it. The new phase co-precipitates with two other compounds with very similar compositionsBa 8 Ga 14.5 Sn 31.5(4) (K 4 Si 23 structure type; cubic space group n Pm3 , Pearson symbol cP54; a = 11.6800(12) Å), and Ba 8 Ga 13.2 Sn 32.8(3) , (Eu 4 Ga 8 Ge 15 structure type; cubic space group m I 3 4 , Pearson symbol cI54; a = 11.5843(7) Å). Detailed discussion on how syntheses affect the crystal chemistry, and the temperature dependence of the atomic displacement parameters, obtained from single-crystal structure refinements, are also reported in this article.

show abstract

Section: Synthesis and Thermal Analysismentioning

confidence: 99%

Ternary Compounds in the Sn-Rich Section of the Ba–Ga–Sn System: Ba8Ga16–xSn30+x (1.1 ≤ x ≤ 2.8) Clathrates of Type-I and Type-VIII, and BaGa2–xSn4+x (x ≈ 0.2) with a Clathrate-like Structure

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Not only in these cases, but also for some formally electron precise polar intermetallics, recent experimental and theoretical work shows that the d states of the alkaline earth “cations” A are considerably involved in the chemical bonding. Examples are the compounds of the CrB structure type8–10 or the tetrelides,11,12 and the mixed triel/tetrelides,13–15 forming the Pu 3 Pd 5 structure type. This effect of an incomplete electron transfer from the A cations to the M anions is strongly increased for the rare‐earth element lanthanum, so that the respective La (and other trivalent rare‐earth element) compounds typically do no longer obey the simple electron counting rules 16–21.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Reduction of Carbon Dioxide to Formic Acid

et al. 2014

View full text Add to dashboard Cite

This Review provides an overview of electrochemical techniques that are implemented in addressing gaseous CO2 towards the synthesis of a particular fuel (i.e. formic acid). The electrochemical reaction mechanism, as well as the advancement of electrodes, catalyst materials, and reactor designs are reviewed and discussed. To date, the electrolytic cell is the dominant reaction site and, based on which, various catalysts have been proposed and researched. In addition, relevant work regarding reactor design optimization for the purpose of alleviating restrictions of the current CO2 electrochemical reduction system are summarized, including low reactant‐transfer rate, high reaction overpotential, and low product selectivity. The use of microfluidic techniques to build microscale electrochemical reactors is identified to be highly promising to largely increase the electrochemical performance. Finally, future challenges and opportunities of electrochemical reduction of CO2 are discussed.

show abstract

“…attention was also piqued by the fact that the system Ba-Ga-Sn appeared carefully mapped out-for example, the polymorphic Ba 8 Ga 16 Sn 30 clathrate-I and clathrate-VIII compounds [5][6][7], as well as some other ternary phases like BaGaSn [8], Ba 3 Ga 0.491 Sn 4.509 [9], and BaGa 3.11 Sn 0.89 [10], have been well characterized-while in the Ba-In-Sn system, no ternary phases have been obtained until now.…”

Section: Open Accessmentioning

confidence: 99%

Indium Doping in BaSn3–x Inx (0 ≤ x ≤ 0.2) with Ni3Sn Structure

et al. 2011

View full text Add to dashboard Cite

Abstract:Investigations of the system Ba-In-Sn, with the objective to synthesize Ba 8 In 16 Sn 30 clathrate using Sn and In flux reactions, yielded instead the known BaSn 3 compound (P6 3 /mmc; a = 7.228(2) Å, c = 5.469(3) Å) from Sn flux and its In-doped variant BaSn 2.8 In 0.2(1) (a = 7.260(1) Å, c = 5.382(2) Å) from In flux. BaSn 3-x In x is the first, and up until now, the only ternary phase containing these elements. Its structure is isomorphic with the Ni 3 Sn type (Pearson symbol hP8) and is apparently capable of sustaining small variations in the valence electron count by virtue of replacing Sn with the electron poorer In. Electrical resistivity measurements on single-crystals of both undoped and doped phases show different metallic-like behavior, suggesting that neither BaSn 3 nor BaSn 3-x In x are valence compounds.

show abstract

Novel barium triel/tetrelides with the structure type

Cited by 11 publications

References 34 publications

Ternary Compounds in the Sn-Rich Section of the Ba–Ga–Sn System: Ba8Ga16–xSn30+x (1.1 ≤ x ≤ 2.8) Clathrates of Type-I and Type-VIII, and BaGa2–xSn4+x (x ≈ 0.2) with a Clathrate-like Structure

Ternary Compounds in the Sn-Rich Section of the Ba–Ga–Sn System: Ba8Ga16–xSn30+x (1.1 ≤ x ≤ 2.8) Clathrates of Type-I and Type-VIII, and BaGa2–xSn4+x (x ≈ 0.2) with a Clathrate-like Structure

Electrochemical Reduction of Carbon Dioxide to Formic Acid

Indium Doping in BaSn3–x Inx (0 ≤ x ≤ 0.2) with Ni3Sn Structure

Contact Info

Product

Resources

About