Structural and electrical properties of new silicides: ThCo /SUB x/ Si /SUB 2-x/ (O less than or equal to x less than or equal to1) and ThTSi (T = Ni, Pt)
New silicides have been prepared in ternary systems: thorium-transition element (T = Co, Ni, Pt)-silicon. With cobalt compounds ThCo /SUB x/ Si /SUB 2-x/ (O less than or equal to x less than or equal to 1) a structural change occurs with the sequence ..cap alpha.. -ThSi/sub 2/ (tetr.) ..-->.. ..beta.. -ThSi/sub 2/ (hex) ..-->.. ..cap alpha.. - ThSi/sub 2/ (tetr.) as x increases. It has been clearly shown that ThPtSi is isostructural with LaPtSi (i.e. of ordered ..cap alpha.. -ThSi/sub 2/ type). However structure refinement from X-ray powder measurements is not conclusive to decide whether Si and T atoms are ordered or disordered in ThTSi (T = Co, Rh, Ir, Ni) compounds of ..cap alpha.. -ThSi/sub 2/ type. ThNiSi, ThPtSi and the cobalt poor and rich compounds have clearly been found to be superconducting above 2K.
- Research Organization:
- Laboratoire de Chimie du Solide du C.N.R.S., Universite de Bordeaux I, Talence
- OSTI ID:
- 6120080
- Journal Information:
- Mater. Res. Bull.; (United States), Vol. 20:10
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure and bonding in Li/sub 2/MoO/sub 3/ and Li/sub 2-x/MoO/sub 3/ (0 less than or equal to x less than or equal to 1. 7)
Magnetic properties of the ThCo/sub 5-x/Ni/sub x/ system
Related Subjects
COBALT SILICIDES
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
NICKEL SILICIDES
PLATINUM SILICIDES
THORIUM SILICIDES
CHEMICAL PREPARATION
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLOGRAPHY
LANTHANUM SILICIDES
METALLURGICAL EFFECTS
QUANTITY RATIO
X-RAY DIFFRACTION
ACTINIDE COMPOUNDS
COBALT COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
LANTHANUM COMPOUNDS
NICKEL COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLATINUM COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
SILICIDES
SILICON COMPOUNDS
SYNTHESIS
THORIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties