Crystal structure of sodium strontium monogermanide, NaxSr1–xGe (x = 0.14)

Xie, Qinxing; Nesper, Reinhard

doi:10.1524/ncrs.2003.218.3.291

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Mixed Ga-trielides Caga 1−x (Al/in) X (Crb Variants)1

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“…In the zig-zag chains, four pure Ga position are adjacent, with the shortest M-M distance of 264 pm in the center of this group (Table 6). These Ga 4 In the In-rich compound CaGa 0.55 In 0.45 (Fig. 6c), the structure of which contains three crystallographically distinguished M positions (Table 4) 3)).…”

Section: Mixed Ga-trielides Caga 1−x (Al/in) X (Crb Variants)mentioning

confidence: 99%

Structure and bonding of ternary gallides CaGa1−x(Si/Sn/Al/In)x with the CrB type and related structures

Harms

Wendorff

Röhr

2009

Journal of Alloys and Compounds

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Section: Mixed Ga-trielides Caga 1−x (Al/in) X (Crb Variants)mentioning

confidence: 99%

Structure and bonding of ternary gallides CaGa1−x(Si/Sn/Al/In)x with the CrB type and related structures

Harms

Wendorff

Röhr

2009

Journal of Alloys and Compounds

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Reversible hydrogenation of the Zintl phases BaGe and BaSn studied by in situ diffraction

Auer

Weber

Hansen

et al. 2018

Zeitschrift Für Kristallographie - Crystalline Materials

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Hydrogenation products of the Zintl phases AeTt (Ae = alkaline earth; Tt = tetrel) exhibit hydride anions on interstitial sites as well as hydrogen covalently bound to Tt which leads to a reversible hydrogenation at mild conditions. In situ thermal analysis, synchrotron and neutron powder diffraction under hydrogen (deuterium for neutrons) pressure was applied to BaTt (Tt=Ge, Sn). BaTtHy (1<y<1.67, γ-phases) were formed at 5 MPa hydrogen pressure and elevated temperatures (400–450 K). Further heating (500–550 K) leads to a hydrogen release forming the new phases β-BaGeH0.5 (Pnma, a=1319.5(2) pm, b=421.46(2) pm, c=991.54(7) pm) and α-BaSnH0.19 (Cmcm, a=522.72(6) pm, b=1293.6(2) pm, c=463.97(6) pm). Upon cooling the hydrogen rich phases are reformed. Thermal decomposition of γ-BaGeHy under vacuum leads to β-BaGeH0.5 and α-BaGeH0.13 [Cmcm, a=503.09(3) pm, b=1221.5(2) pm, c=427.38(4) pm]. At 500 K the reversible reaction α-BaGeH0.23 (vacuum)⇄β-BaGeH0.5 (0.2 MPa deuterium pressure) is fast and was observed with 10 s time resolution by in situ neutron diffraction. The phases α-BaTtHy show a pronounced phase width (at least 0.09<y<0.36). β-BaGeH0.5 and the γ-phases appear to be line phases. The hydrogen poor (α- and β-) phases show a partial occupation of Ba4 tetrahedra by hydride anions leading to a partial oxidation of polyanions and shortening of Tt–Tt bonds.

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Crystal structure of sodium strontium monogermanide, NaxSr1–xGe (x = 0.14)

Cited by 2 publications

References 5 publications

Structure and bonding of ternary gallides CaGa1−x(Si/Sn/Al/In)x with the CrB type and related structures

Structure and bonding of ternary gallides CaGa1−x(Si/Sn/Al/In)x with the CrB type and related structures

Reversible hydrogenation of the Zintl phases BaGe and BaSn studied by in situ diffraction

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