Structure of Gd3Ru4Al12, a new member of the EuMg5.2structure family with minority-atom clusters

Article Article scientifique Article Structure of Gd3Ru4Al12, a new member of the EuMg5.2structure family with minority-atom clusters eng 1993 author Gladyshevskii Roman 27288 author Strusievicz Octavian Robert 87113 author Cenzual Karin Margareta 26418 author Parthe Erwin 25104 474-478 10.1107/S0108768192011510 0108-7681 http://scripts.iucr.org/cgi-bin/paper?S0108768192011510 Gd3Ru4+xAll2-x [x = 0.13 (2)], Mr = 1209.44, hexagonal, hP38, P63/mmc – kh2g f ba (No. 194), a = 8.8142 (6), c = 9.5692 (9) A, V= 643.8 (1) A3, Z = 2, Dx=6.239Mgm -3, A(Mo Ka)=0.71073A, u= 20.330 mm-1, F(000) = 1056 (1), T= 293 K, wR=0.023 for 338 contributing unique reflections. Gd3Ru4AI12 is a substitution variant of the Sc3Ni11Ge4 structure which is a partly disordered variant of the Sc3Ni11Si4 type, all three structures being ternary substitution derivatives of the EuMg5.2 or ErZn5 types. Contrary to the related structure types, in Gd3Ru4AI12 both Wyckoff sites 2(a) and 2(b) have full occupation, i.e. an ordered arrange- ment of alternate Ru and AI atoms is observed along the c axis. The structure of Gd3Ru4AI12 is built up of two kinds of layers perpendicular to [001]: planar layers of composition Gd3Al4 and puckered layers of composition Ru4AI5. Similar layers are found in cubic Hf6Ni7AI16, a ternary substitution variant of Th6Mn23, as well as in hexagonal Sr9Mg38 and BaLi4. Dewey 500.2 27 Section de physique 13 false Acta crystallographica. Section B, Structural science 49 ec759734-ca59-4463-b96b-7091f57accc7 Article (Published version) Restricted O.R.Strusievicz.pdf 551933 application/pdf restrictedAccess Faculté des sciences / Section de physique

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Structure of Gd₃Ru₄Al₁₂, a new member of the EuMg_5.2structure family with minority-atom clusters	Acta crystallographica. Section B, Structural science			1993	497	0

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Strusievicz, Octavian Robert