Synthesis, structure, and properties of Sr sub 2 CuO sub 2 Cl sub 2

Journal Article · Wed Jan 31 23:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.1921· OSTI ID:7009260

Miller, L L; Wang, X L; Wang, S X; Stassis, C; Johnston, D C ^[1]; Faber, J Jr; Loong, C ^[2]

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1. Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011 (US)
2. Argonne National Laboratory, Argonne, Illinois 60439 (USA)

Syntheses of single-crystal specimens and single-phase polycrystalline samples of Sr{sub 2}CuO{sub 2}Cl{sub 2} are reported. Differential-thermal-analysis measurements indicate that this compound melts incongruently at 990 {degree}C in air and at 970 {degree}C in helium. Rietveld refinement of powder neutron diffraction data confirms the body-centered-tetragonal ({ital I}4/{ital mmm}) K{sub 2}NiF{sub 4}-type structure found earlier using x-ray techniques by Grande and Mueller-Buschbaum. The CuO{sub 2} planes are the same as in (tetragonal) La{sub 2}CuO{sub 4}, but the out-of-CuO{sub 2}-plane oxygens in the latter are replaced by Cl. The temperature dependences of the lattice parameters and thermal factors are reported; the tetragonal structure is retained from 300 K down to at least 25 K. Electrical-resistivity measurements exhibit essentially insulating behavior near room temperature, with {rho}{sub {ital ab}}{congruent}3000 {Omega} cm and {rho}{sub {ital c}}{congruent}6.5{times}10{sup 5} {Omega} cm.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7009260
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:4; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
COPPER CHLORIDES
COPPER COMPOUNDS
COPPER HALIDES
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HALIDES
HALOGEN COMPOUNDS
LATTICE PARAMETERS
LOW TEMPERATURE
MEDIUM TEMPERATURE
MONOCRYSTALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
SCATTERING
STRONTIUM CHLORIDES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYNTHESIS
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE
X-RAY DIFFRACTION