TY - JOUR
T1 - Trigonal SrAl2H2
T2 - the first Zintl phase hydride
AU - Gingl, F.
AU - Vogt, T.
AU - Akiba, E.
N1 - Funding Information:
We thank Dr B. Hunter for collecting the neutron powder diffraction data. F. Gingl would like to thank the New Energy and Industrial Technology Development Organization (NEDO) for granting a NEDO Fellowship. This work was supported in part by the Division of Materials Sciences, US Department of Energy, under contract DE-AC02-76CH00016.
PY - 2000/6/23
Y1 - 2000/6/23
N2 - The title compound and its deuteride were synthesized by hydrogenating/deuterating SrAl2 at 50 bar H2/D2 pressure and temperatures below 200°C. As found by in situ X-ray powder diffraction, the hydrogenation of SrAl2 proceeds in three steps, with SrAl2H2 as the first product. SrAl2H2 and SrAl2D2 were characterized by X-ray and neutron powder diffraction. They crystallize with a new trigonal structure in space group P3̄m1 (164), cell parameters: a=4.5283(1) angstrom, c=4.7215(2) angstrom (hydride), a=4.5253(1) angstrom, c=4.7214(2) angstrom (deuteride), Z=1. The main feature of this structure is a two-dimensional polymer Zintl anion, ∞2[AIH-]2n, in which one H atom is covalently bonded to each Al atom. SrAl2H2 is the first example of a Zintl phase hydride, i.e., the first Zintl phase in which hydrogen atoms are a part of the Zintl anion.
AB - The title compound and its deuteride were synthesized by hydrogenating/deuterating SrAl2 at 50 bar H2/D2 pressure and temperatures below 200°C. As found by in situ X-ray powder diffraction, the hydrogenation of SrAl2 proceeds in three steps, with SrAl2H2 as the first product. SrAl2H2 and SrAl2D2 were characterized by X-ray and neutron powder diffraction. They crystallize with a new trigonal structure in space group P3̄m1 (164), cell parameters: a=4.5283(1) angstrom, c=4.7215(2) angstrom (hydride), a=4.5253(1) angstrom, c=4.7214(2) angstrom (deuteride), Z=1. The main feature of this structure is a two-dimensional polymer Zintl anion, ∞2[AIH-]2n, in which one H atom is covalently bonded to each Al atom. SrAl2H2 is the first example of a Zintl phase hydride, i.e., the first Zintl phase in which hydrogen atoms are a part of the Zintl anion.
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U2 - 10.1016/S0925-8388(00)00755-6
DO - 10.1016/S0925-8388(00)00755-6
M3 - Article
AN - SCOPUS:0033707252
SN - 0925-8388
VL - 306
SP - 127
EP - 132
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -