Syntheses of [F5TeNH3][AsF6], [F5TeN(H)Xe][AsF6], and F5TeNF2and Characterization by Multi-NMR and Raman Spectroscopy and by Electronic Structure Calculations:  The X-ray Crystal Structures of α- and β-F5TeNH2, [F5TeNH3][AsF6], and [F5TeN(H)Xe][AsF6]

2006 ◽  
Vol 45 (5) ◽  
pp. 1978-1996 ◽  
Author(s):  
Barbara Fir ◽  
J. Marc Whalen ◽  
Hélène P. A. Mercier ◽  
David A. Dixon ◽  
Gary J. Schrobilgen
Keyword(s):  
Raman Spectroscopy ◽  
Electronic Structure ◽  
Crystal Structures ◽  
Electronic Structure Calculations ◽  
X Ray ◽  
Structure Calculations

ErNi2.23Al2.77 and YbNi2.31Al2.69 – i3 superstructures of the CaCu5 type

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nazar Zaremba ◽  
Ihor Muts ◽  
Volodymyr Pavlyuk ◽  
Viktor Hlukhyy ◽  
Rainer Pöttgen ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Electronic Structure Calculations ◽  
Crystal Chemical ◽  
Muffle Furnace ◽  
Space Group ◽  
X Ray ◽  
Structure Calculations

Abstract The title compounds have been synthesized by reaction of the elements in sealed tantalum crucibles in a muffle furnace using special annealing sequences. The crystal structures of YbNi2.31Al2.69 (R1 = 0.0100 for 212 F 2 values and 18 variables) and for ErNi2.23Al2.77 (R1 = 0.0154 for 255 F 2 values and 18 variables) were refined from single crystal X-ray data. They belong to the YNi2Al3 type (i3 superstructure of CaCu5) with the following crystallographic parameters: space group P 6 / m m m $P6/mmm$ , Pearson’s symbol hP18, Z = 3, a = 8.2723(12), c = 4.0672(8) Å, V = 241.03(8) Å3 for YbNi2.31Al2.69 and a = 8.9109(13), c = 4.0669(8) Å, V = 279.66(8) Å3 for ErNi2.23Al2.77. The crystal chemical discussion is supported by electronic structure calculations.

X-ray Crystal Structures of [XF6][Sb2F11] (X = Cl, Br, I);35,37Cl,79,81Br, and127I NMR Studies and Electronic Structure Calculations of the XF6+Cations

2004 ◽  
Vol 43 (22) ◽  
pp. 6905-6921 ◽  
Author(s):  
John F. Lehmann ◽  
Gary J. Schrobilgen ◽  
Karl O. Christe ◽  
Andreas Kornath ◽  
Reijo J. Suontamo
Keyword(s):  
Electronic Structure ◽  
Crystal Structures ◽  
Electronic Structure Calculations ◽  
Nmr Studies ◽  
X Ray ◽  
Structure Calculations

Crystal structure characterization and electronic structure of a rare-earth-containing Zintl phase in the Yb–Al–Sb family: Yb3AlSb3

2021 ◽  
Vol 77 (6) ◽  
Author(s):  
Rongqing Shang ◽  
An T. Nguyen ◽  
Allan He ◽  
Susan M. Kauzlarich
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Rare Earth ◽  
Electronic Structure Calculations ◽  
Structure Characterization ◽  
Charge Balance ◽  
X Ray Diffraction ◽  
Zintl Phase ◽  
X Ray ◽  
Structure Calculations

A rare-earth-containing compound, ytterbium aluminium antimonide, Yb3AlSb3 (Ca3AlAs3-type structure), has been successfully synthesized within the Yb–Al–Sb system through flux methods. According to the Zintl formalism, this structure is nominally made up of (Yb2+)3[(Al1−)(1b – Sb2−)2(2b – Sb1−)], where 1b and 2b indicate 1-bonded and 2-bonded, respectively, and Al is treated as part of the covalent anionic network. The crystal structure features infinite corner-sharing AlSb4 tetrahedra, [AlSb2Sb2/2]6−, with Yb2+ cations residing between the tetrahedra to provide charge balance. Herein, the synthetic conditions, the crystal structure determined from single-crystal X-ray diffraction data, and electronic structure calculations are reported.

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