scholarly journals Crystal structure and magnetic study of the complex salt [RuCp(PTA)2–μ-CN-1κC:2κN–RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5]

2021 ◽  
Vol 77 (7) ◽  
pp. 749-754
Author(s):  
Mario Pacheco ◽  
Natalia Alvarez ◽  
Alicia Cuevas ◽  
Antonio Romerosa ◽  
Francesc Lloret ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Complex Salt ◽  
Mononuclear Complex ◽  
Parameter Analysis ◽  
X Ray Diffraction ◽  
Spin Doublet ◽  
X Ray ◽  
Liquid Diffusion ◽  
Complex Ion

A new RuII–ReII complex salt, μ-cyanido-κ2 C:N-bis[(η5-cyclopentadienyl)bis(3,5,7-triazaphosphaadamantane-κP)ruthenium(II)] tetrabromido(ethanol/methanol-κO)nitrosylrhenate(II), [Ru(CN)(C5H5)2(C6H12N3P)4][ReBr4(NO)(CH4O)0.5(C2H6O)0.5] or [RuCp(PTA)2–μ-CN–1κC:2κ2 N-RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5] (PTA = 3,5,7-triazaphosphaadamantane) was obtained and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. The title salt was obtained by liquid–liquid diffusion of methanol/DMSO solutions of (NBu4)[Re(NO)Br4(EtOH)] and [(PTA)2CpRu–μ-CN–1κC:2κ2 N-RuCp(PTA)2](CF3SO3). The RuII and ReII independent moieties correspond to a binuclear and mononuclear complex ion, respectively. A deep geometrical parameter analysis was performed, and no significant differences were found with earlier reports containing similar molecules. The magnetic properties were investigated in the temperature range 2.0–300 K, and the complex behaves as a quasi-magnetically isolated spin doublet with weak antiferromagnetic interactions.

The crystal structure of potassium trichloro(2,6-lutidine)platinum(II)

1976 ◽  
Vol 54 (6) ◽  
pp. 1002-1006 ◽  
Author(s):  
R. Melanson ◽  
F. D. Rochon
Keyword(s):  
Crystal Structure ◽  
Complex Salt ◽  
Platinum Atom ◽  
Potassium Ions ◽  
Distorted Tetrahedron ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray ◽  
Salt Forms ◽  
Coordination Plane

The molecular and crystal structure of potassium trichloro(2,6-lutidine)platinum(II) has been determined by X-ray diffraction. The complex salt forms monoclinic crystals, a = 6.941, b = 24.301, c = 11.168 Å, β = 141.58°, Z = 4, and space group P21/c. Positional and anisotropic thermal parameters were refined by full matrix least squares calculations to R = 0.038 and Rw = 0.034.The coordination around the platinum atom is planar. The Pt—Cl bond lengths are 2.301, 2.299, and 2.302 Å and the Pt—N bond length is 2.011 Å. The 2,6-lutidine ring lies almost perpendicular to the coordination plane of the platinum atom (81.6°). The PtCl3 moieties are packed around the potassium ions, which are surrounded by four chlorine atoms at distances smaller than 3.15 Å forming a distorted tetrahedron.

Karakterisasi Struktur Kristal dan Sifat Magnetik Magnet Stronsium Ferit Pasir Besi Batang Sukam Kabupaten Sijunjung Sumatera Barat

2017 ◽  
Vol 1 ◽  
pp. 38
Author(s):  
Arif Budiman ◽  
Dwi Puryanti ◽  
Sri Mulyadi Dt. Basa ◽  
Muhammad Rizki ◽  
Helfi Syukriani
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Phase ◽  
Oxidation Process ◽  
Strontium Ferrite ◽  
X Ray Diffraction ◽  
Hexagonal Crystal ◽  
X Ray

<p><strong>Abstract:</strong> The synthesis and characterization of the crystal structure and magnetic properties of strontium ferrite magnets (SrO.6Fe<sub>2</sub>O<sub>3</sub>) has been done. Hematite (Fe<sub>2</sub>O<sub>3</sub>) is synthesized from iron sand of Batang Sukam Sijunjung Sumatera Barat through the oxidation process by temperature 700ºC for 3.0 hours. Strontium carbonate (SrCO<sub>3</sub>) was obtained from Merck product with a purity of more than 99%. Synthesis of strontium ferrite magnets are made through a process of solid-solid mixing and sintering at a temperature of 1000ºC for 3.0 hours. The results of characterization of X-ray diffraction indicates that it has formed a single phase strontium ferrite magnets with a hexagonal crystal structure. The result of measurement of the magnetic properties shows that an average magnetic susceptibility of strontium ferrite magnet is 266.7 × 10<sup>-8 </sup>m<sup>3</sup> /kg.</p><p> </p><p><strong>Keywords</strong>: strontium ferrite magnet, iron sand, crystal structure and magnetic susceptibility.</p><p><strong> </strong></p><p><strong>Abstrak:</strong> Telah dilakukan sintesis dan karakterisasi struktur kristal dan sifat magnetik magnet stronsium ferit (SrO.6Fe<sub>2</sub>O<sub>3</sub>). Hematit (Fe<sub>2</sub>O<sub>3</sub>) disintesis daripasir besi Batang Sukam Kabupaten Sijunjung Sumatera Barat melalui proses oksidasi dengan temperatur 700ºC selama 3,0 jam. Stronsium karbonat (SrCO<sub>3</sub>) diperoleh dari produk Merck dengan kemurnian lebih dari 99 %. Sintesis magnet stronsium ferit dibuat melalui proses <em>solid-solid mixing</em> dan disintering pada suhu 1000ºC selama 3,0 jam. Hasil karakterisasi difraksi sinar-X menunjukkan bahwa telah terbentuk <em>single phase</em> magnet stronsium ferit dengan struktur kristal heksagonal. Hasil pengukuran sifat magnet menunjukkan bahwa magnet stronsium ferit memiliki suseptibilitas magnetik rata-rata 266,7 × 10<sup>-8</sup> m<sup>3</sup>/kg.</p><p> </p><p><strong>Kata Kunci:</strong> magnet stronsium ferit, pasir besi, struktur kristal dan suseptibilitas magnetik.</p>

Thermal Evolution of Magnetic Properties and Crystal Structure in Compositionally Modulated Al/Ni Thin Films

1991 ◽  
Vol 232 ◽  
Author(s):  
A. Waknis ◽  
E. Haftek ◽  
M. Tan ◽  
J. A. Barnard ◽  
E. Tsang
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Magnetic Properties ◽  
Thermal Evolution ◽  
Dead Layer ◽  
Multilayer Thin Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Individual ◽  
Deposited Films

ABSTRACTPeriodic multilayer thin films of the form (xAl/yNi)n were grown by alternate deposition of pure Al and Ni using dc-magnetron sputtering. The thicknesses of the individual Al and Ni layers are given by x and y, respectively, and the total number of bilayer units is n. For this set of experiments, x was fixed at 3.5 nm while y was systematically varied from 2.4 to 154 nm. The films were tested in as-deposited and annealed states for magnetic properties using a vibrating sample magnetometer and for crystal structure by x-ray diffraction. In both the as-deposited and annealed samples the magnetization per unit volume of Ni declined as the Ni layer thickness decreased. This result can be interpreted in terms of a magnetically ‘dead’ layer at the Al/Ni interfaces. The width of the dead layer increased from 2.9 nm to 5.8 nm on annealing. Magnetic properties were correlated with crystal structure experiments by x-ray diffraction. As-deposited films yielded a Ni(111) texture. The Ni (111) peak decreased in intensity and broadened as the Ni thickness declined. Annealing produced evidence for the growth of the intermetallic NiAl3.

Synthesis, Crystal Structure and Magnetic Properties of a (μ-Hydroxo)(μ-Pyrazolato) Dicopper(II) Complex

2000 ◽  
Vol 55 (9) ◽  
pp. 796-802 ◽  
Author(s):  
H. Kara ◽  
Y. Elerman ◽  
K. Prout
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Variable Temperature ◽  
Powdered Sample ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray ◽  
Present Complex ◽  
Square Planar ◽  
Super Exchange Interaction

Preparation and magnetic properties of a 3,5-dimethylpyrazolate bridged binuclear copper(II) complex [Cu2(L)(3 ,5 -pyz)] (L = 1,3-Bis(2-Hydroxy-5-Chlorosalicylideneamino)propan- 2-ol) is reported. The crystal structure determined by X-ray diffraction methods. (C22H20N4O3CI2CU2), triclinic, space group P1̄, a = 9.622(3), b = 10.921(2), c = 11.420(3) Å, α = 100.73(2), β = 94.04(2), Υ = 108.08(2)°, V = 1110.2(5) Å3, Z = 2. Two copper(II) ions in a square-planar coordination are bridged via alkoxide oxygen and 3,5-dimethyl pyrozolate nitrogen atoms to form a dinuclear unit. The metal coordination sphere is four-coordinate, planar with an N2O2 donor set. The dihedral angle between the two coordination planes is 166.83°. There are significant intermolecular interactions between neighbouring binuclear entities. The shortest intermolecular Cu (1) ... Cu(1)i distance is 3.383(1) Å and the Cu(1) - O ( 1)i distance is 2.666(3) Å (i = 1 -x, -y, 1 - z). The variable-temperature magnetic susceptibility measurement for a powdered sample of the complex was carried out in the temperature range 5 - 350 K and analysed to obtain values of the parameter J in the exchange Hamiltonian ℋ = -2JScu Scu; 2J = -164 cm-1. The magnetic moment at 300 K is about 2.42 μB, and 0.22 μB at 5 K. The weak antiferromagnetism of the present complex is reasonably explained in terms of the orbital countercomplementary effect based on Hoffmann's theory for super-exchange interaction

Magnetic Properties of Tb(Ni0.95Fe0.05)3 Crystalline Compound and Powder

2013 ◽  
Vol 203-204 ◽  
pp. 292-295 ◽  
Author(s):  
Krzysztof Ociepka ◽  
Ania Bajorek ◽  
Artur Chrobak ◽  
Grażyna Chełkowska
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Milling Time ◽  
Crystalline Compound ◽  
X Ray Diffraction ◽  
X Ray ◽  
Arc Melting ◽  
Melting Technique ◽  
Xrd Patterns

The magnetic properties and the crystal structure of the ball-milled Tb(Ni0.95Fe0.05)3compound have been studied by using magnetization measurements and X-ray diffraction (XRD). The results were compared with those obtained for the bulk compound prepared by arc-melting technique. The investigated sample is polycrystalline and crystallizes in the rhombohedral PuNi3type of crystal structure (space group R-3m). With the increase of the time milling (i.e. 1 h, 24 h and 48 h) a for-mation of grains less than 1μm and a reduction of magnetocaloric effect have been observed. The analysis of XRD patterns for ball-milled powders shows that after 48h milling time there is still visible a crystalline structure.

Structural and magnetic properties of the low-dimensional fluoride β-FeF3(H2O)2·H2O

2015 ◽  
Vol 44 (31) ◽  
pp. 14130-14138 ◽  
Author(s):  
Gwilherm Nénert ◽  
Oscar Fabelo ◽  
Kerstin Forsberg ◽  
Claire V. Colin ◽  
Juan Rodríguez-Carvajal
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
High Resolution ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Low Dimensional

We have reinvestigated the crystal structure of the low-dimensional fluoride β-FeF3(H2O)2·H2O using high resolution neutron and X-ray diffraction data.

scholarly journals Magnetic properties of a new cobalt hydrogen vanadate with a dumortierite-like structure: Co13.5(OH)6(H0.5VO3.5)2(VO4)6

2019 ◽  
Vol 75 (6) ◽  
pp. 777-782
Author(s):  
Mohammed Hadouchi ◽  
Abderrazzak Assani ◽  
Mohamed Saadi ◽  
Abdelilah Lahmar ◽  
Mimoun El Marssi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Single Crystal ◽  
Magnetic Measurements ◽  
Crystal Form ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Pyramidal Groups ◽  
Scanning Electron

The magnetic properties of a novel cobalt-based hydrogen vanadate, Co13.5(OH)6(H0.5VO3.5)2(VO4)6, are reported. This new magnetic material was synthesized in single-crystal form using a conventional hydrothermal method. Its crystal structure was determined from single-crystal X-ray diffraction data and was also characterized by scanning electron microscopy. Its crystal framework has a dumortierite-like structure consisting of large hexagonal and trigonal channels; the large hexagonal channels contain one-dimensional chains of face-sharing CoO6 octahedra linked to the framework by rings of VO4 tetrahedra, while the trigonal channels are occupied by chains of disordered V2O4 pyramidal groups. The magnetic properties of this material were investigated by DC magnetic measurements, which indicate the occurrence of antiferromagnetic interactions.

The molecular structure of high-spin (S = {\bf 5} \over {\bf 2}) manganese(II) phthalocyanine in tetrabutylammonium bromido(phthalocyaninato)manganese(II)

2014 ◽  
Vol 70 (5) ◽  
pp. 449-451 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Alexey V. Kuzmin ◽  
Salavat S. Khasanov ◽  
Rimma N. Lyubovskaya
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Bond Length ◽  
Single Crystals ◽  
High Spin ◽  
Complex Salt ◽  
Title Complex ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffusion Technique

The title complex salt, (C16H36N)[MnBr(C32H16N8)] or (TBA)[MnIIBr(Pc)] (TBA is tetrabutylammonium and Pc is phthalocyaninate), has been obtained as single crystals by the diffusion technique and its crystal structure was determined using X-ray diffraction. The high-spin (S = 5\over 2) [MnIIBr(Pc)]− macrocycle has a concave conformation, with an average equatorial Mn—N(Pc) bond length of 2.1187 (19) Å, an axial Mn—Br bond length of 2.5493 (7) Å and with the MnII cation displaced out of the 24-atom Pc plane by 0.894 (2) Å. The geometry of the MnIIN4 fragment in [MnIIBr(Pc)]− is similar to that of the high-spin (S = 5\over 2) manganese(II) tetraphenylporphyrin (TPP) in [MnII(1-MeIm)(TPP)] (1-MeIm is 1-methylimidazole).

Low-Temperature Structure and Magnetic Properties of Tetraphenylarsonium Tetrachloronitridotechnetate(VI)

1996 ◽  
Vol 49 (5) ◽  
pp. 633 ◽  
Author(s):  
BN Figgis ◽  
PA Reynolds ◽  
FK Larsen ◽  
GA Williams ◽  
CD Delfs
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Neutron Diffraction ◽  
Single Crystals ◽  
Temperature Structure ◽  
X Ray Diffraction ◽  
Magnetic Susceptibilities ◽  
Space Group ◽  
X Ray

The crystal structure of [As(C6H5)4] [TcNCl4] was determined at 120 K by X-ray diffraction and at 28 K by neutron diffraction. The crystals are tetragonal, space group P4/n, with a 1260.4(3) and c 773.2(2) pm at 120 K. The [TcNCl4]-anion possesses exact C4v symmetry, with Tc≡N distances of 160.3(2) and 162.5(4)pm at 120 and 28 K respectively. Magnetic susceptibilities were measured on single crystals from 300 to 4.5 K. The results indicate a well behaved S ½ system following the Curie-Weiss law with θ -0.13 K

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