Crystal structure and low-temperature magnetic properties ofRmMIn3m+2compounds (M=Rh or Ir;m=1,2;R=Sm or Gd)

2001 ◽  
Vol 63 (5) ◽  
Author(s):  
P. G. Pagliuso ◽  
J. D. Thompson ◽  
M. F. Hundley ◽  
J. L. Sarrao ◽  
Z. Fisk
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature

Crystal structure and magnetic properties of “α′′-Fe16N2” containing residual α-Fe prepared by low-temperature ammonia nitridation

2012 ◽  
Vol 194 ◽  
pp. 76-79 ◽  
Author(s):  
S. Yamashita ◽  
Y. Masubuchi ◽  
Y. Nakazawa ◽  
T. Okayama ◽  
M. Tsuchiya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature

Reinvestigation of the Reaction of (NH4)2[Ce(N03)6] with Triphenylphosphine Oxide; the Crystal Structure and Magnetic Properties of mer-Ce(NO3)3(OPPh3)3 • 2 (CH3)2CO

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1241-1247 ◽  
Author(s):  
Jianhua Lin ◽  
Evamarie Hey-Hawkins ◽  
Hans Georg von Schnering
Keyword(s):  
Crystal Structure ◽  
Field Theory ◽  
Magnetic Properties ◽  
Reaction Time ◽  
Low Temperature ◽  
Triphenylphosphine Oxide ◽  
High Yield ◽  
Crystal Data ◽  
Crystal Field Theory

AbstractThe reaction of (NH4)2[Ce(NO3)6 ] with two equivalents of OPPh3(Ph = C6H5 ) in acetonitrile yields Ce(NO3 ) 4(OPPh3 )2 (1) in high yield, whereas using acetone as solvent affords mer- Ce(NO3 )3(OPPh3)3 • 2(CH3)2CO (2), the yield of which is dependent on the reaction time. A crystal structure determination of 2 shows that the Ce atom is coordinated with three bidentate nitrato groups and three OPPh3 ligands, thus achieving a coordination number of nine. Eight non-coordinating acetone molecules are present in the unit cell. Crystal data (292 K): space group P21/n (no. 14), 0=12.438(2), b = 25.532(4), c = 20.379 (4) Å, β = 96.33(2)°, V = 6432(1) , Z = 4, dcalc = 1.318 g em 3. Due to poor crystal quality the refinement converges at R = 0.11, Rw = 0.09. 2 is paramagnetic, but it does not follow the Curie-Weiss law at low temperature. Therefore crystal field theory was used in order to explain these findings.

MAGNETIC PROPERTIES OF R2In (R=Gd, Tb, Er)

1993 ◽  
Vol 07 (01n03) ◽  
pp. 818-821 ◽  
Author(s):  
D. RAVOT ◽  
O. GOROCHOV ◽  
T. ROISNEL ◽  
G. ANDRE ◽  
F. BOUREE-VIGNERON ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Low Temperature ◽  
Neutron Diffraction ◽  
Antiferromagnetic State ◽  
Powder Neutron Diffraction ◽  
Magnetic Transport ◽  
The Rare Earth

For all the Rare-Earth (R) the R2In form in the same crystal structure (P63/mmc). These compounds show a great variety of magnetic behaviors. When the temperature decreases, the magnetic susceptibility of Er2InTb2In and Gd2In increases, passes through a maximum then decreases. For Gd2In this behavior was associated with change from a paramagnetic to a ferromagnetic then to an antiferromagnetic state. We have performed magnetic, transport (Tb, Er), Mössbauer spectroscopy (Er) and powder neutron diffraction experiments (Gd, Tb, Er) on these compounds. Unlike Gd2In the resistivity of Tb2In and Er2In does not reveal any anomaly at the temperature where the susceptibility begins to decrease and the Tb2In and Er2In magnetizations show the same behavior at all temperatures in the ordered region. Neutron diffraction experiments reveal ferromagnetic and antiferromagnetic structures at low temperature.

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

scholarly journals Low-temperature crystal structure and magnetic properties of Gd5Ge3

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
Ya. Mudryk ◽  
D. Paudyal ◽  
V. K. Pecharsky ◽  
K. A. Gschneidner
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Low Temperature Crystal Structure

Crystal structure and magnetic properties of CuMoO4 at low temperature (γ-phase)

1997 ◽  
Vol 58 (1) ◽  
pp. 153-160 ◽  
Author(s):  
H. Ehrenberg ◽  
H. Weitzel ◽  
H. Paulus ◽  
M. Wiesmann ◽  
G. Wltschek ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature

Low temperature crystal structure and magnetic properties of RAl2

2014 ◽  
Vol 115 (17) ◽  
pp. 17E109 ◽  
Author(s):  
Arjun K. Pathak ◽  
D. Paudyal ◽  
K. A. Gschneidner ◽  
V. K. Pecharsky
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Low Temperature Crystal Structure

Thermochrome Chloro- und Bromocuprate: [C(NH2)3]2[CuBr4], (H3CC2N2SNH3)2[Cu2Br6], (C7N3H14)2[CuCl4], (C7N3H14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] und (BrC3N2H6)2[CuBr4] / Thermochromic Chloro- and Bromocuprates: [C(NH2)3]2[CuBr4], (H3CC2N2SNH3)2[Cu2Br6], (C7N3H14)2[CuCl4], (C7N3H14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] und (BrC3N2H6)2[CuBr4]

1998 ◽  
Vol 53 (9) ◽  
pp. 933-938 ◽  
Author(s):  
Isabel Díaz ◽  
Vicente Fernández ◽  
José Luis Martínez ◽  
Lothar Beyer ◽  
Astrid Pilz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Mass Spectra ◽  
Room Temperature ◽  
Bond Angles ◽  
Bond Lengths ◽  
Organic Bases ◽  
Structure Determinations ◽  
Imidazolinium Salts

CuCl2 and CuBr2 were reacted in water-ethanol solutions containing HCl or HBr, respectively, with the following organic bases or their chlorides or bromides: guanidine (1), 2-amino-5-methyl-1,3,4-thiadiazol (2), hexahydro-2H-pyrimidine-(1,2A)-pyrimidine (3), and 2-hydrazino-2-imidazoline (4). With 1 and 3 the tetrahalocuprates (1H)2[CuBr4], (3H)2[CuCl4] and (3H)2[CuBr4] were obtained having flattened tetrahedral anions. 2 and CuBr2 form (2H)2[Cu2Br6], with nearly planar [Cu2Br6]2- ions that are associated to chains with squarepyramidal coordination of Cu. 2 and CuCl2 yield the hydrate (2H)Cl·H2O . 4 undergoes substitution of the hydrazine group for halogen, yielding the 2-halo-2-imidazolinium salts (5H)0,2(6H)0,8[CuCl3OH2] and (6H)2[CuBr4] in addition to [H3NCH2CH2NH3][CuCl4] (5 = 2-chloro-, 6 = 2-bromo-2-imidazoline). The planar [CuCl3(OH2)]- ions are associated to chains. Crystal structure determinations were performed with (1H)2[CuBr4], (2H)2[Cu2Br6], (3H)2[CuCl4], (5H)0,2(6H)0,8[CuCl3OH2] and (6H)2[CuBr4]; the latter three at 298 K and at 166 K or 173 K. The known crystal structure of [H3N(CH2)2NH3][CuCl4] was redetermined at 166 K. In all cases small differences of bond lengths and bond angles are observed between room temperature and low temperature. The magnetic properties and electrospray mass spectra were measured. The products show thermochromic behavior.

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