Dr
Karl Johnston
(ISOLDE/CERN)
28/03/2010, 09:20
At the radioactive ion beam facility, ISOLDE-CERN, more than 900 isotopes of 70 elements are produced and delivered as radioactive ion beams of high elemental and isotopic purity. At ISOLDE an extensive solid state programme of research has been in place for many years and continues to develop and expand by the year. This activity embraces a wide range of techniques and materials.
Among the...
Dr
Olivier TOUGAIT
(Université de Rennes1)
28/03/2010, 09:40
The binary uranium-carbon phase-diagram comprises three intermediate phases (UC, U2C3 and UC2) showing high melting / decomposition points, high thermal conductivity, lack of phase-transformations at temperatures of practical relevance, and good stability under irradiations, which allow their use under extreme conditions. An enormous amount of work has been directed to those binary compounds...
Mr
Arnaud Soudé
(Université Rennes 1)
28/03/2010, 10:00
The recent discovery of the coexistence of ferromagnetic order and pressure induced superconductivity in UCoGe [1] has boosted up explorative investigations on the crystal-chemistry and low-temperature physical properties of novel intermetallic phases in the U-Co-Ge ternary system. These efforts resulted in the characterization of six intermediate phases, which have hitherto been reported in...
Dr
Kristina Kvashnina
(ESRF)
28/03/2010, 11:45
A central issue in the investigation of various properties of actinide systems is the nature of the 5f electrons in different systems. Many of the unusual properties found specifically in uranium (U) compounds are thought to be related to the delocalization of the partially filled U 5f electron states and their hybridization with the U 6d-7s states. However, due to the complexity of the...
Dr
Leon Petit
(Daresbury Laboratory)
28/03/2010, 12:05
The ground-state electronic structures of the actinide oxides AO, A2O3, and AO2
Mr
BORIS DORADO
(CEA CADARACHE)
28/03/2010, 12:25
Uranium dioxide UO2 is the standard nuclear fuel used in current pressurized water reactors. The description of this oxide by first-principles calculations remains challenging because of the peculiar properties of the uranium 5f electrons which do not allow the standard LDA or GGA functionals to accurately reproduce its electronic properties.
In this study, we use the DFT+U approximation to...
Mrs
Céline Claveranne-Lamolère
(IPREM/LCABIE and CEA-DAM-DIF)
28/03/2010, 14:20
Uranium is an actinide which naturally occurs in the environment. Its applications (civilian nuclear industry, agriculture, military applications, etc…) have induced an anthropogenic contamination, particularly in soils. So it is essential to know conditions and understand mechanisms of its transport. According to IUPAC, colloids refer to molecules or polymolecular particles which have in one...
Mr
Sébastien Lectez
(CNRS)
28/03/2010, 14:40
In order to understand the various mechanisms involved in the retention of the radionuclides on mineral surfaces, molecular simulations appear as a complementary tool to experiments. In this work, we propose to study the sorption of the solvated uranyl cation UO22+ on an abundant mineral surface, the gibbsite (Al(OH)3. The study of such complex systems may involve finite temperature...
2.
The Features of Luminol Chemiluminescence in Detection of Trace Amounts of Actinides in Solutions
Igor Izosimov
(Khlopin Radium Institute)
28/03/2010, 15:00
A widespread application of tunable lasers to analytical problems gave impetus to development of new procedures for detection of trace amounts of a substance in various media. A capability to vary the wavelength of laser radiation allows selective action on atoms and molecules and also their selective detection. From the practical standpoint, liquids are the most suitable for analysis since...
Dr
jean-christophe griveau
(ITU JRC EC)
28/03/2010, 15:50
Strongly correlated behaviours, superconductivity, quantum criticality
oral
The ThCr2Si2 (body centered I/4mmm) structure has long been typical of systems presenting striking physical properties. Two compounds presenting this structure, namely CeCu2Si2[1] and URu2Si2[2] are unconventional superconductors, and the nature of the coupling mechanism is still under debate 30 years after their discovery. Here we have focused on Transuranium systems (TU) with this structure...
a p pikul
28/03/2010, 16:10
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Kondo effect in the presence of ferromagnetism in U1–xThxNiSi2
(ORAL)
Adam P. Pikul and Dariusz Kaczorowski
W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P Nr 1410, 50–950 Wrocław 2, Poland; e-mail: A.Pikul@int.pan.wroc.pl
The compound UNiSi2 crystallizes with an orthorhombic structure of the CeNiSi2-type and exhibits a ferromagnetic...
Dr
Daniel Gnida
(Institute of Low Temperature and Structure Research, Polish Academy of Sciences)
28/03/2010, 16:30
The ternary uranium arsenide U2Cu4As5 crystallizes with a body-centred tetragonal structure of its own type (space group I4/mmm, lattice parameters: a = 3.990 Ă, b = 24.299 Ă) [1]. Magnetic susceptibility measurements revealed that the compound orders antiferromagnetically at TN = 189 K [1]. The onset of the ordered state is accompanied by a rapid drop in the electrical resistivity [1]. Here,...
Dr
Mathieu Pasturel
(Sciences Chimiques de Rennes)
28/03/2010, 16:30
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Several binary or ternary uranium based germanides have been reported to exhibit superconductivity at low temperatures, that emerges either from paramagnetic state (e.g. U7Ge, U5Ge3 [1]) or from ferromagnetically ordered state, in ambient pressure conditions (e.g. URhGe [2], UCoGe [3]) or under applied hydrostatic pressure (e.g. UGe2 [4]). In the search for other germanides with interesting...
Dr
Manh Duc Le
(Helmholtz Zentrum Berlin für Materialen und Energie)
29/03/2010, 09:20
UPd3 is a rare example of a compound where the low temperature ordered phase involves the alignment of electric quadrupoles of the f-electrons on neighbouring ionic sites, rather than their magnetic dipole moments. We show inelastic neutron spectra of the dispersion of crystal field excitations in UPd3, which are consistent with RPA calculations assuming quadrupolar exchange interactions...
Dr
eric colineau
(European Commission)
29/03/2010, 09:40
The actinide compounds AnX3, where X is an element from Group IIIA or IVA, crystallize in the cubic AuCu3 structure. They are characterized by an actinide-actinide interatomic distance far above the Hill limit, therefore 5f–ligand hybridization is the main mechanism responsible for the delocalization of the 5f electrons. The systematic of this hybridization has been well demonstrated for the...
Dr
António Pereira Gonçalves
(Instituto Tecnológico e Nuclear)
29/03/2010, 10:00
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Magnetic ordering in the heavy-fermion compound UZn12
A.P. Gonçalves1,*, D. Gnida2, P. Estrela3,4, A. de Visser4, E.B. Lopes1, I. Catarino5, G. Bonfait5, M. Godinho6, M. Almeida1, D. Kaczorowski2
1 Dep. Química, Instituto Tecnológico e Nuclear, P-2686-953 Sacavém, Portugal.
2 Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O.Box 1410, 50-950 Wroclaw,...
Ms
Anna Maria Adamska
(AGH University of Science and Technology)
29/03/2010, 10:00
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Several unconventional superconductors, i.e. those where non-phonon mediated superconductivity is considered, can be found among U-based compounds. Such materials occur at the onset of magnetic order, and magnetic fluctuations have to be considered as a key ingredient of a pairing mechanism. A recently investigated example of such an unconventional compound is UCoGe, reported to be a weak...
Dr
Manh Duc Le
(Helmholtz Zentrum Berlin für Materialen und Energie)
29/03/2010, 10:45
Strongly correlated behaviours, superconductivity, quantum criticality
poster
We present the resistivity and Hall coefficient of the heavy fermion compound PuPd3 and its solid solution with LuPd3. A simple crystal field model of conduction s-electrons scattering off local f-electron moment was found to describe the low temperature behavior of the resistivity. This model suggests that the s-f exchange interaction as well as the inter f-electron interactions decrease with...
Dr
António Pereira Gonçalves
(Instituto Tevnológico e Nuclear)
29/03/2010, 10:55
Considerations on the U-Fe-B ternary system
M. Dias1,2, I.C. Santos1, P.A. Carvalho2, M.Bohn3, O. Tougait4,
H. Noël4, A.P. Gonçalves1
1Dep. Química, Instituto Tecnológico e Nuclear/CFMC-UL, P-2686-953 Sacavém, Portugal
2Dep. Eng. Materiais, Instituto Superior Técnico, Av Rovisco Pais, 1049-001 Lisboa, Portugal
3Departement DRO/Geosciences Marines, Ifremer Centre de Brest, B.P....
Yuriy Verbovytskyy
(Instituto Tecnológico e Nuclear)
29/03/2010, 11:00
Crystallographic study of new phases from the U–Zn–Al ternary system
Yu.V. Verbovytskyy, A.P Gonçalves
Departamento de Química, Instituto Tecnológico e Nuclear/CFMC–UL, 2863–953 Sacavém, Portugal
yuryvv@bigmir.net
Uranium based intermetallic compounds have been intensively studied due to their unusual ground states and behaviours (as intermediate valence states, heavy fermion...
Yurii Skourski
(Hochfeld-Magnetlabor Dresden, FZ Dresden-Rossendorf, D-01314 Dresden, Germany)
29/03/2010, 11:05
Strongly correlated behaviours, superconductivity, quantum criticality
poster
UCo2Si2 belongs to a wide group of UT2X2 compounds, where T is a late d metal and X is Si or Ge. They exhibit a large variety of magnetic states starting from antiferromagnetic (AF) ordering for UCr2Si2, ferrimagnetic (UNi2Si2) and ferromagnetic (F) structures (UCu2Si2) through Pauli paramagnets (UFe2Si2) to compounds, which become superconducting inside an AF state (URu2Si2) [1-3]. UCo2Si2...
Dr
Thomas Scott
(University of Bristol)
29/03/2010, 11:10
Experimental surrogates for Plutonium may provide an effective means to help understand and model some of the many complex metallurgical issues concerning material. Cerium, located in the lanthanide family of the periodic table, is considered to be a non-radioactive surrogate of Pu because of the several similarities between the two metals including similar crystal structures (fcc), multiple...
Mrs
Carmen Ileana Cristache
(IFIN-HH)
29/03/2010, 11:15
Gamma ray spectrometry and ICP-MS methods were investigated in vegetation samples, collected from the surface tailing, near a uranium mine, located in the Baita region , West part of Romania. The main goal of this investigation was to determine distribution of soil-to-plant transfer factors for the natural uranium isotopes and to compare the experimental results obtained between this methods....
Prof.
NICOLAS DACHEUX
(ICSM/LIME)
29/03/2010, 11:20
Considering several properties of interest, Thorium Phosphate-Diphosphate Th4P6O23 (namely beta-TPD) was considered as a promising matrix for the specific immobilization of actinides. Among its interesting properties, one can note its capability to form solid solutions with high actinides mole loadings, its good sintering capability and its high resistance to aqueous corrosion or to radiation...
Mr
Stefano Corradetti
(INFN-LNL)
29/03/2010, 11:25
Materials used in targets for RIBs production have to satisfy several requirements, related to their capability both to produce specific isotopes with high efficiencies and to withstand harsh operating conditions.
Within the SPES group, new carbides with tailored properties are currently studied and developed in order to maximize isotopes production at extreme conditions.
In particular,...
Ms
Anna Maria Adamska
(AGH University of Science and Technology)
29/03/2010, 11:30
Strongly correlated behaviours, superconductivity, quantum criticality
poster
Hydrogenation is a powerful tool capable of changing both crystal structure and magnetic properties of intermetallic compounds. The hydrogen absorption of UTSi compounds (T = Co, Pd, Ni) compounds obtained by direct synthesis from intermetallic precursors at high H2 pressure (pH2 > 100 bar) leads to a notable lattice expansion and an increase of respective magnetic ordering temperatures [1,2]....
Dr
Shadi Yasin
(Hochfeld-Magnetlabor Dresden, Forschungszentrum Dresden-Rossendorf, Germany)
29/03/2010, 11:35
Strongly correlated behaviours, superconductivity, quantum criticality
poster
The Uranium ternary intermetallic material UIrGe belongs to the large family of UTX compounds (T = transition metal and X = Si or Ge) and crystallizes in the orthorhombic TiNiSi-type structure (space group Pnma) [1]. Its isoelectronic analogs URhGe and UCoGe have recently attracted much attention due to exotic coexistence of ferromagnetism and super-conductivity [2,3]. Previous high-field...
Ms
Margarida Henriques
(Departamento de Química, Instituto Tecnológico e Nuclear/CFMC-UL, 2863-953 Sacavém, Portugal)
29/03/2010, 11:40
Investigations on uranium-based ternary intermetallics continue to reveal new phases, with specific structures and rich variety of ground-state properties. In the U-Fe-Ge system the previously reported ternary intermetallic compounds were UFeGe (P21/m, type UFeGe below 500K, and Pnma, type TiNiSi above 500K) [1], UFe2Ge2 (I4/mmm, type ThCr2Si2) [2], UFe6Ge6 (P6/mmm, type YbCo6Ge6) [3], and the...
Alexander Andreev
(Institute of Physics AVCR, Prague)
29/03/2010, 11:45
Strongly correlated behaviours, superconductivity, quantum criticality
poster
See the andreev_jda10.doc and andreev_jda10.pdf files sent by e-mail.
Mr
Adrian Borhan
(“Al.I. Cuza” University, Faculty of Chemistry, 11 - Carol I Blvd., 700506 - Iaşi, Romania), Mr
Bogdan Apetrachioaiei
(“Al.I. Cuza” University, Faculty of Chemistry, 11 - Carol I Blvd., 700506 - Iaşi, Romania)
29/03/2010, 11:50
The present study is aimed to elucidate the existence of the ceric orthophosphate by synthesis and characterization of ‘Ce3(PO4)4’ and CePO4. The results obtained indicate a mixed valence in both phosphates obtained, corresponding to nonstoichiometric compounds of cerium in an intermediate oxidation state (molar ratios P/Ce of 1.06 to 1.18). Based on the results obtained, the existence of...
Mr
Dan Tiberiu Costin
(CEA)
29/03/2010, 11:55
Actinides silicates, including coffinite (USiO4), and derived mineral phases obtained either by cationic or anionic substitutions have been widely studied from various points of view (chemistry, geology, radioecotoxicology). Even if some recent studies led to a reproducible method of preparation for synthetic coffinite samples, this family of compounds remains poorly described in terms of...
Ms
Raquel Jovaní Abril
(Institute for Transuranium Elements)
29/03/2010, 12:00
High-performance ceramics with nanosized microstructures and functionalized porosities provide the technical base for a large variety of applications in many technologies. This type of microstructure of interest in the nuclear field is due to its appearance at the periphery of Light Water Reactor (LWR) UO2 fuel at high burn-up. As shown in the past, the fuel spontaneously transforms to a...
Dr
Mihaela Gladiola Bragea
(Institute of Public Health Timisoara)
29/03/2010, 12:05
A study is presented on the disequilibrium of uranium isotopes (234U and 238U) in soils and vegetation samples collected near an uranium tailing dump. Factors affecting uptake of uranium by plants, including relationships between these radionuclides in soils and in plants, and the temporal changes of uranium concentrations in different plant species are discussed. The 234U/238U atom ratio can...
Dr
Nicolas Clavier
(ICSM)
29/03/2010, 14:00
The co-precipitation of tetravalent actinides as an oxalate single phase is currently considered as a promising option to improve the homogeneity as well as the sinterability of mixed oxides fuels envisaged in several concepts of Gen-IV nuclear reactors [ ]. Even if actinides oxalates are studied since several decades in this purpose, some uncertainties remain about the associated...
Mr
Denis Horlait
(ICSM/LIME)
29/03/2010, 14:20
The understanding of dissolution processes of actinides dioxides has become essential for the optimization of reprocessing operations associated to the back-end of nuclear fuel cycle. As several GenIV reactor concepts plan to operate the simultaneous reprocessing of majors and minors actinides (such as AmIII and CmIII) in new fuel elements, we focused a study on the influence of the...
22.
Influence of crystallization state and microstructure over chemical durability of mixed dioxides
Mr
laurent CLAPAREDE
(CEA/DEN/DRCP/SCPS/LC2A)
29/03/2010, 14:40
Influence of crystallization state and microstructure over chemical durability of mixed dioxides
L. Claparède 1,2, N. Clavier 2, N. Dacheux 2, R. Podor2, J. Ravaux2
P. Moisy 1 and J. Dauby 1
1 CEA/DEN/DRCP/SCPS/LCA, Site de Marcoule, BP 17171, 30207 Bagnols / Cèze, France, e-mail:
Laurent.claparede@cea.fr
2 ICSM, Site de Marcoule, BP 17171, 30207 Bagnols / Cèze, France
The...
T. Klimczuk
30/03/2010, 09:20
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Crystal structure and physical properties of NpRh2Sn,
a new Np-based ternary compound
T. Klimczuk,1,2 J.-C. Griveau,1 R. Eloirdi,1 E. Colineau1, and R. Caciuffo1
1 European Commission, Joint Research Center, Institute for Transuranium Elements, Postfach 2340, Karlsruhe, D-76125 Germany, e-mail: Tomasz.Klimczuk@ec.europa.eu
2 Faculty of Applied Physics and Mathematics, Gdansk...
Dr
Piotr Gaczyński
(JRC Institut for Transuranium Elements)
30/03/2010, 09:40
Strongly correlated behaviours, superconductivity, quantum criticality
oral
During the past decades ternary actinide-based compounds containing d- and p-electron elements have attracted much attention for their large variety of physical behaviors arising mostly from the hybridization of actinide 5f electrons with s, p and /or d states on neighboring sites. An example of a system with promising physical behavior is the ATX composition where A stands for actinide atoms,...
v h tran
30/03/2010, 10:00
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Synthesis and magnetic properties
of a new ferromagnetic Kondo-lattice system Np2PdGa3
Blank line (12 points)
V. H. Tran,1 J. -C. Griveau,2 R. Eloirdi,2 W. Miiller, 1 E. Colineau,2
Blank line (12 points)
1 Institute of Low Temperature and Structure Research,
Polish Academy of Sciences, P. O. Box 1410, 50-950 Wrocław, Poland
2European Commission, Joint Research Centre, Institute for...
Dr
Alexander Shick
(Institute of Physics ASCR, Prague)
30/03/2010, 11:05
In the present work, we study the electron correlation effects in the electronic structure and spectra of Pu-Am, Pu-Ce alloys and PuCoGa5. We make use of the “local density matrix” approximation (LDMA) to DMFT, that combines the Hubbard-I approximation with the full-potential linearized augmented plane wave (FP-LAPW) method , including self-consistency over the charge density. Calculated PE...
Ladislav Havela
(Charles University Prague)
30/03/2010, 11:45
Strongly correlated behaviours, superconductivity, quantum criticality
oral
In the U-Pu phase diagram a mysterious ζ-U-Pu phase exists over a large composition range (35-70 % U). This cubic (rhombohedrally distorted) phase has 10 different crystallographic positions, randomly occupied by U and Pu. When compared with other Pu allotropic phases, its volume density of 18.55 g/cm3 fits about half way between a-(19.92 g/cm3 ) and b-Pu (17.70 g/cm3).This value is much...
Dr
Bernard COQBLIN
(CNRS-Univ. Paris-Sud, 91405-Orsay, France)
30/03/2010, 11:45
The Schrieffer-Wolff transformation for the S=1 Underscreened Kondo Lattice model : Application to Uranium compounds
Christopher Thomas1, Acirete S. da Rosa Simoes1, J. R. Iglesias1, C. Lacroix2,
N. B. Perkins3, B. Coqblin4
1 Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Brazil.
2 Institut Néel, CNRS-UJF, 38042 Grenoble Cedex 9,...
Dr
Charles-Olivier Bacri
(CNRS/IN2P3 Institut de Physique Nucléaire)
30/03/2010, 14:00
CACAO, Chimie des Actinides et Cibles radioActives à Orsay, is a project of laboratory for the production and characterization of thin radioactive layers. The project is now launched and almost financed. It should be fully operational by the end 2010.
Besides the production of targets, CACAO aims to be a node of a kind of network of laboratories dedicated to find isotopes, but also to...
Dr
Ondrej Benes
(EC-JRC-ITU)
30/03/2010, 14:30
The Molten Salt Reactor (MSR) is one of the six reactor concepts of the Generation IV (GenIV) initiative. In this concept the fissile material (233U, 235U and 239Pu) is dissolved in the molten fluoride matrix circulating in the primary circuit from the reactor core to the heat exchanger and back. Compared to solid fuel reactors, the advantage of the MSR is the possibility of fuel purification...
Dr
Thomas Scott
(University of Bristol)
30/03/2010, 15:30
The interaction between metallic uranium surfaces and water vapour is considered to be most important in regard to the environmental corrosion of the metal. Numerous studies have examined the initial stages of these interactions. However, there have been discrepancies in the published data describing kinetic laws, pressure dependence of the reaction rate constant and activation energies. The...
jerry nolen
30/03/2010, 16:30
Dr
Robert Bark
(iThemba LABS)
30/03/2010, 17:40
The main accelerator of iThemba Laboratory for Accelerator Based Sciences is a K = 200 Separated Sector Cyclotron (SSC). Use of the accelerator is shared by groups engaging in nuclear physics research, radiation therapy and radio-isotope production. The long term plan calls for the addition a high-intensity, K = 70 MeV proton accelerator to the laboratory, to both alleviate over-subscription...
Dr
Alberto Andrighetto
(INFN - Laboratori di Legnaro)
30/03/2010, 18:10
oral
The SPES project at Laboratori di Legnaro of INFN (Italy) is concentrating on the production of neutron-rich radioactive nuclei by the Uranium fission at a rate of 10^13 fission/s . The emphasis to neutron-rich isotopes is justified by the fact that this vast territory has been little explored, at exceptions of some decay and in-beam spectroscopy following fission.. The Rare Ion Beam (RIB)...
Dr
Lisa Biasetto
(LNL-INFN & Univerisity of Padova)
31/03/2010, 09:00
The first online mass separated isotope (ISOL) beam was produced 60 years ago at the Niels Bohr Institute in Copenhagen. Krypton beams were obtained by fission reactions in a large and heated UO2 target positioned at proximity of a neutron converter [1]. Since then a large variety of other targets and primary drivers have been developed and used in several facilities throughout the world. At...
Dr
Lisa Biasetto
(LNL-INFN)
31/03/2010, 10:00
The development of targets for RIBs production is a challenging field for material scientists, who are asked to develop materials possessing tailored properties in order to:
1) produce the isotopes requested by the specific experiment
2) grant for high release efficiency of the produced isotopes
3) long life of the target during bombardment
In addition, the severe operating...
Eugene Spejewski
(Oak Ridge Associated Universities)
31/03/2010, 11:00
Yield determinations of various uranium targets which could be used in the presented concept of a two-stage target.
AHMET OZGUMUS
(Institut de Physique Nucléaire d’Orsay, UMR 8608 CNRS, Université Paris-Sud 11, Orsay)
31/03/2010, 12:00
Very recently studies have been started at IPNO within the framework of the SPIRAL2 project to optimize the properties of uranium carbide used as a fission target. The required characteristics of this target are both the high fission production yield and the capability to release the fission products outside the material as fast as possible. The method of production of this material must be...
Mathieu QUICLET
(GANIL)
01/04/2010, 09:00
dan stracener
01/04/2010, 09:30
Mr
John Greene
(Argonne National Laboratory)
01/04/2010, 10:00
Molecular plating provides an efficient method to prepare sources and targets of actinide elements on thick and thin backings. These are required for experiments at the Argonne Tandem Linac Accelerator System (ATLAS) heavy-ion accelerator. Although the technique is simple and fairly reproducible, because of the radioactive nature of the targets, it is vital to record the various parameters...
Dr
Nicola Colonna
(INFN Bari)
01/04/2010, 10:30
01/04/2010, 11:30
thomas otto
01/04/2010, 12:10
P Swatek
Strongly correlated behaviours, superconductivity, quantum criticality
oral
Transport and thermodynamic properties of UFe2Zn20
Przemysław Swatek and Dariusz Kaczorowski
Institute of Low Temperature and Structure Research, Polish Academy of Sciences,
P.O. Box 1410, 50-950 Wrocław, Poland
e-mail: P.Swatek@int.pan.wroc.pl
Ternary rare-earth-based intermetallic compounds RT2M20 (R = Ce, Gd, Yb; T = d-electron transition metal; M = Zn, Al) crystallize...
