Magnetic and Electrical Properties of a New Series of Rare Earth Silicide Carbides with the CompositionR3Si2C2(R=Y, La–Nd, Sm, Gd–Tm)

Gerdes, Martin H.; Witte, A.M. de; Jeitschko, Wolfgang; Lang, Arne; Künnen, Bernd

doi:10.1006/jssc.1998.7772

Cited by 23 publications

(24 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this context we refer to the discussion of bonding in the Pr ReC type carbides, where similar weak R}R bonding interactions must be assumed (20}22). Since the R atoms are the most electropositive components of the R Si C silicide carbides, the Fermi level likely cuts through the only partially "lled R}R bonding bands, and this may explain the metallic conductivity of these compounds reported in our earlier publication (1). In Fig.…”

Section: Discussionmentioning

confidence: 96%

“…These 12 compounds show metallic conductivity and their magnetic ordering temperatures are all lower than 60 K. They were found to crystallize with at least two slightly di!erent structures with a common subcell. The lattice constants for this orthorhombic subcell have already been published (1). In the present paper we report the structure of the subcell and two di!erent superstructures.…”

Section: Introductionmentioning

confidence: 93%

“…They were mounted on a four-circle di!ractometer. The crystal of Tb Si C was investigated "rst, and the search routine of the di!ractometer resulted in the correct orthorhombic cell dimensions of the superstructure: a"423.1 (1) The structure determinations of these three compounds showed that they crystallize with a very pronounced common orthorhombic subcell. For the crystal of the praseodymium compound only subcell re#ections were observed, …”

Section: Lattice Constantsmentioning

confidence: 99%

See 2 more Smart Citations

Subcell Structure and Two Different Superstructures of the Rare Earth Metal Silicide Carbides Y3Si2C2, Pr3Si2C2, Tb3Si2C2, and Dy3Si2C2

Jeitschko

Gerdes

Witte

et al. 2001

Journal of Solid State Chemistry

Self Cite

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 93%

Section: Lattice Constantsmentioning

confidence: 99%

See 1 more Smart Citation

Subcell Structure and Two Different Superstructures of the Rare Earth Metal Silicide Carbides Y3Si2C2, Pr3Si2C2, Tb3Si2C2, and Dy3Si2C2

Jeitschko

Gerdes

Witte

et al. 2001

Journal of Solid State Chemistry

Self Cite

View full text Add to dashboard Cite

“…However, no thermodynamic optimizations were performed on the RE‐Si‐C systems. Table lists the crystal structure information of the RE 3 Si 2 C 2 phases as well as the binary compounds in the La‐Si and Pr‐Si systems …”

Section: Literature Reviewmentioning

confidence: 99%

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Chang

Zhou

et al. 2020

J Am Ceram Soc

View full text Add to dashboard Cite

The Y3Si2C2 coating on the silicon carbide (SiC) powders is reported to improve the sintering process, but the relatively high sintering temperature (1600°C) restricts the engineering application. A series of thermodynamic descriptions for the SiC with light rare‐earth elements are desired to develop potential SiC‐RE3Si2C2 core‐shell structures as sintering aids with lower temperatures. Coupling the CALPHAD (CALculation of PHAse Diagram) approach and first‐principles calculations, we have investigated the RE‐Si‐C (RE = La, Ce and Pr) systems. In the SiC‐RE3Si2C2 core‐shell structures, the RE3Si2C2 phases can react with SiC via ternary eutectic reactions at 810°C, 747°C, and 1148°C respectively. The predicted thermal behaviors of the Pr3Si2C2 phase were further confirmed by our key experiments. Therefore, our database can be used to predict promising sintering aids and guide the subsequent processes.

show abstract

“…The electrical conductivity of LaPdSi was determined with a four-probe technique as described elsewhere [16]. The electrical resistivity of LaPdSi increases from 4 K to room temperature with no discontinuity within this range (Fig.…”

Section: Magnetic Properties and Electrical Conductivity Of Lapdsi Cmentioning

confidence: 99%

Preparation, Crystal Structure, and Physical Properties of the Rare-Earth Metal Palladium Silicides LnPdSi (Ln = La, Ce, Pr) and the a-ThSi2 Type Compounds LaPd0.787(2)Si1.213(2) and CePd0.758(5)Si1.242(5)

Prots

Jeitschko

Gerdes

et al. 1998

Z. anorg. allg. Chem.

Self Cite

View full text Add to dashboard Cite

The equiatomic rare‐earth metal palladium silicides LnPdSi (Ln = La, Ce, Pr) crystallize with a new monoclinic structure type, which was determined from singlecrystal X‐ray data of PrPdSi: P21/c, a = 1079.1(5) pm, b = 584.1(2) pm, c = 786.7(2) pm, β = 92.00(2)°, Z = 8. The palladium and silicon atoms form a three‐dimensionally infinite network, where the palladium atoms have three silicon neighbors, while one kind of silicon atoms is coordinated to four palladium atoms and the other kind to one silicon and two palladium atoms. The bond lengths Pd–Si (from 242.8 to 255.3 pm) and Si–Si (233.0 pm) are similar to those of corresponding two‐electron bonds. The praseodymium atoms are coordinated by 12 silicon and palladium atoms. One Pr–Pr distance is surprisingly short with 347.5 pm. LaPdSi is a metallic conductor and Pauli paramagnetic, while CePdSi and PrPdSi show Curie‐Weiss behavior with magnetic moments typical for Ce+3 and Pr+3 and ferro‐ or ferrimagnetic order below 7 K. The compounds LaPd0.787(2)Si1.213(2) and CePd0.758(5)Si1.242(5) crystallize with α‐ThSi2 type structure. Their composition was determined by structure refinements from single‐crystal X‐ray data.

show abstract

Magnetic and Electrical Properties of a New Series of Rare Earth Silicide Carbides with the CompositionR3Si2C2(R=Y, La–Nd, Sm, Gd–Tm)

Cited by 23 publications

References 10 publications

Subcell Structure and Two Different Superstructures of the Rare Earth Metal Silicide Carbides Y3Si2C2, Pr3Si2C2, Tb3Si2C2, and Dy3Si2C2

Subcell Structure and Two Different Superstructures of the Rare Earth Metal Silicide Carbides Y3Si2C2, Pr3Si2C2, Tb3Si2C2, and Dy3Si2C2

Thermodynamic descriptions of the light rare‐earth elements in silicon carbide ceramics

Preparation, Crystal Structure, and Physical Properties of the Rare-Earth Metal Palladium Silicides LnPdSi (Ln = La, Ce, Pr) and the a-ThSi2 Type Compounds LaPd0.787(2)Si1.213(2) and CePd0.758(5)Si1.242(5)

Contact Info

Product

Resources

About