scholarly journals Crystal structure and magnetism of the linear-chain copper oxidesSr5Pb3−xBixCuO12

2001 ◽  
Vol 64 (18) ◽  
Author(s):  
K. Yamaura ◽  
Q. Huang ◽  
E. Takayama-Muromachi
Keyword(s):  
Crystal Structure ◽  
Linear Chain

Linear-chain platinum(II) dithiocarboxylates: crystal structure of tetrakis(phenyldithioacetato)diplatinum(II)

1987 ◽  
pp. 35 ◽  
Author(s):  
Carlo Bellitto ◽  
Mario Bonamico ◽  
Giulia Dessy ◽  
Vincenzo Fares ◽  
Alberto Flamini
Keyword(s):  
Crystal Structure ◽  
Linear Chain

Crystal and molecular structure of 9-(2,4,6-trinitroanilino)-carbazole, C18H11N5O6

1987 ◽  
Vol 65 (6) ◽  
pp. 1322-1326 ◽  
Author(s):  
Hong Wang ◽  
Richard J. Barton ◽  
Beverly E. Robertson ◽  
John A. Weil ◽  
Keith C. Brown
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Crystal And Molecular Structure ◽  
Linear Chain ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Adjacent Molecule ◽  
Neighboring Molecule ◽  
Infinite Linear

The crystal structure of 9-(2,4,6-trinitroanilino)-carbazole, C18H11N5O6, has been determined by X-ray diffraction. Crystals are monoclinic, space group P21/c, a = 14.686(11), b = 24.601(12), c = 10.047(5) Å, β = 107.76(5)° at 292 K, with Z = 8. The two nitrogen atoms in the central fragment have a staggered conformation with an N—N distance of 1.381(4) Å, which is considerably shorter than N—N distances in related N-picrylhydrazine molecules. The picryl moiety has a geometry similar to that of related N-picrylhydrazine molecules. The title compound contains an [Formula: see text] intramolecular bond to one of the ortho nitro groups on the picryl ring. The carbazole plane of one molecule and the picryl plane of a neighboring molecule overlap to form an infinite linear chain of the form … DhA:DhA … where D represents the carbazole donor, h the linear chain linkage within the molecule, and A represents the picryl acceptor of one molecule. The two interplanar distances between D of one molecule and A of an adjacent molecule are 3.28(13) and 3.34(13) Å, indicating a strong π-molecular interaction.

Ti5Si1.3Sb1.7 — The first titanium silicide antimonide, forming a crystal structure not found in either binary system

2001 ◽  
Vol 79 (9) ◽  
pp. 1338-1343
Author(s):  
Holger Kleinke
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Binary System ◽  
Ternary Phase ◽  
Linear Chain ◽  
Titanium Silicide ◽  
Main Group Elements ◽  
Band Structure Calculations ◽  
Structure And Bonding ◽  
Structure Calculations

Ti5SixSb3–x can be prepared by melting mixtures of Ti, Si, and TiSb2. The ternary phase with x = 1.32(5) crystallizes in the W5Si3 type (space group I4/mcm, Z = 8, for x = 1.32(5): a = 1034.6(2), c = 515.2(1) pm), while Ti5Sb3 and Ti5Si3 adopt the Yb5Sb3 type and the Mn5Si3 type, respectively. The Si and Sb atoms share two sites in Ti5Si1.32(5)Sb1.68: one site is located within a linear chain with short interatomic bonds, which is almost exclusively occupied by Si (i.e., 92(1)% Si and 8% Sb), whereas the second site, being occupied by 80(2)% Sb and 20% Si, shows no significant interactions between the main group elements. Band structure calculations reveal the new silicide antimonide being metallic as a consequence of partly filled Ti d states. The structure is mainly stabilized by bonding Ti—Sb, Ti—Si, and Si—Si interactions.Key words: titanium, silicide, antimonide, crystal structure, electronic structure, structure and bonding.

Synthesis, crystal structure and magnetic properties of a new copper oxo-antimony sulphate CuSb6O8(SO4)2

2016 ◽  
Vol 45 (1) ◽  
pp. 392-396 ◽  
Author(s):  
Iwan Zimmermann ◽  
Reinhard K. Kremer ◽  
Shichao Hu ◽  
Mats Johnsson
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Long Range ◽  
Linear Chain ◽  
Heisenberg Antiferromagnet ◽  
Antiferromagnetic Ordering

The crystal structure of the new compound CuSb6O8(SO4)2 is made up of charge neutral layers with long antimony oxygen distances present in between the layers. CuSb6O8(SO4)2 constitutes a linear chain S = 1/2 Heisenberg antiferromagnet (J ∼ 2.8 K) which undergoes long-range antiferromagnetic ordering at 0.69 K.

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