Superfluorescence from europium atom at 629.977nm

2008 ◽  
Vol 281 (8) ◽  
pp. 2093-2096 ◽  
Author(s):  
S. Bhattacharyya ◽  
S.G. Nakhate
Keyword(s):  
Europium Atom

Structure and stereochemistry in 'f-block' complexes of high coordination number. VII. The [M(unidentate X)2(unidentate Y)6] system: Crystal structure of hexaaquadichloroeuropium(III) chloride (a redetermination)

1983 ◽  
Vol 36 (3) ◽  
pp. 477 ◽  
Author(s):  
DL Kepert ◽  
JM Patrick ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Coordination Number ◽  
Title Compound ◽  
Chlorine Atoms ◽  
Coordination Environment ◽  
Twofold Axis ◽  
High Coordination Number ◽  
Europium Atom ◽  
High Coordination

The crystal structure of the title compound [EuCl2(OH2)2]Cl ('europium trichloride hexahydrate') has been redetermined from single-crystal diffractometer data at 295 K and refined to a residual of 0.040 for 1094 independent 'observed' reflections. Crystals are monoclinic, P2/n, a 9.659(3), b 6.529(2), c 7.936(4) �, β 93.67(4)�, Z 2. The europium atom lies on a crystallographic twofold axis, which passes between the two planes of a square-antiprismatic coordination environment in which the two chlorine atoms, on opposite faces, lie cis to each other. Eu-O distances range from 2.401(6) to 2.431(5) �; Eu-Cl is 2.774(2) �.

scholarly journals Synthesis, crystal structure and magnetism of Eu3Sc2O5Fe2As2

2015 ◽  
Vol 70 (9) ◽  
pp. 671-676 ◽  
Author(s):  
Franziska Hummel ◽  
Marcus Tegel ◽  
Birgit Gerke ◽  
Rainer Pöttgen ◽  
Dirk Johrendt
Keyword(s):  
Crystal Structure ◽  
Magnetic Susceptibility ◽  
Effective Magnetic Moment ◽  
Structural Transition ◽  
Magnetic Measurements ◽  
Rietveld Analysis ◽  
Resistance Furnace ◽  
X Ray ◽  
Antiferromagnetic Ordering ◽  
Europium Atom

AbstractThe iron arsenide Eu3Fe2O5Fe2As2 was synthesized at 1173–1373 K in a resistance furnace and characterized by X-ray powder diffraction with Rietveld analysis: Sr3Fe2O5Cu2S2 type, I4/mmm, a = 406.40(1) pm, c = 2646.9(1) pm. Layers of edge-sharing FeAs4/4 tetrahedra are separated by perovskite-like oxide blocks. No structural transition occurs in the temperature range from 10 to 300 K. Magnetic measurements have revealed Curie–Weiss behavior with an effective magnetic moment of 7.79 μB per europium atom in agreement with the theoretical value of 7.94 μB for Eu2+. A drop in the magnetic susceptibility at 5 K indicates possible antiferromagnetic ordering. 151Eu and 57Fe Mössbauer spectroscopic measurements have confirmed a beginning cooperative magnetic phenomenon by showing significantly broadened spectra at 4.8 K compared to those at 78 K.

Spin exchange asymmetry in elastic electron scattering from europium atom

2013 ◽  
Vol 34 (0) ◽  
pp. 125-131
Author(s):  
В. І. Келемен ◽  
М. М. Довганич ◽  
Є. Ю. Ремета
Keyword(s):  
Electron Scattering ◽  
Spin Exchange ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
Europium Atom

Experimental study of bound and autoionizing Rydberg states of the europium atom

2010 ◽  
Vol 19 (6) ◽  
pp. 063202 ◽  
Author(s):  
Xiao Ying ◽  
Dai Chang-Jian ◽  
Qin Wen-Jie
Keyword(s):  
Experimental Study ◽  
Rydberg States ◽  
Europium Atom

Coordination Chemistry of the Calixarenes. II. Europium(III) and p-t-Butyl Calix[6]arene

1988 ◽  
Vol 41 (9) ◽  
pp. 1465 ◽  
Author(s):  
LM Engelhardt ◽  
BM Furphy ◽  
JM Harrowfield ◽  
DL Kepert ◽  
AH White ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Single Crystal ◽  
Structure Determination ◽  
The Other ◽  
Arene Complexes ◽  
X Ray ◽  
Ligand Ratio ◽  
Lanthanide Elements ◽  
Europium Atom

The possible nature of p-t-butyl-calix [6] arene complexes of lanthanide elements has been explored by determination of the single-crystal X-ray structure of a complex with a 1:2 europium/ ligand ratio, obtained from dimethylformamide (dmf ≡ Me2NCHO) solution. This complex is formulated as [ Eu (LH4)(Me2NCHO)6(OH)].LH6.~4Me2NCHO (LH6 = p-t-butyl-calix [6] arene) on the basis of the structure determination. Crystals are monoclinic, P21/n, a 36.11(3), b 23.35(2), c 21.85(2)Ǻ, β 97.46(6)°, Z = 4 formula units; R was 0.11 for 8488 'observed' reflections. The complex is remarkable in that the only interaction of either of the two calixarene ligands (one presumably doubly or triply deprotonated ) with the eight-coordinate europium atom is by way of one behaving as monodentate, the other having no interaction. Eu -O( calix ) is 2.35(1) Ǻ; Eu -O( dmf )6 range from 2.38(2) to 2.49(2)Ǻ, and Eu -O(H ½?) is 2.49(2)Ǻ.

Investigation of Europium Atom by Two-Color Three-Photon Resonant Ionization Spectroscopy

2010 ◽  
Vol 30 (7) ◽  
pp. 2142-2148
Author(s):  
谢军 Xie Jun ◽  
戴长建 Dai Changjian ◽  
李鸣 Li Ming
Keyword(s):  
Resonant Ionization ◽  
Europium Atom
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