Intergrowth of two different layered networks in the metallic copper oxyselenide Na[sub 1. 9]Cu[sub 2]Se[sub 2][sm bullet]Cu[sub 2]O

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00025a004· OSTI ID:7073711

Park, Y; Kanatzidis, M G ^[1]; DeGroot, D C; Schindler, J L; Kannewurf, C R ^[2]

---

1. Michigan State Univ., East Lansing (United States)
2. Northwestern Univ., Evanston, IL (United States)

Solid-state oxy-chalcogenides of the late transition metals are rare. One reason for this may be the relative low oxophilicity and high chalcophilicity of these metals. An oxy-chalcogenide is defined as a compound with metal-oxide and metal-chalcogen bonds but no direct O-Q (Q = S, Te) bonds. Even though numerous copper chalcogenides and copper oxides exist, not mixed copper oxychalcogenides have been reported. Since these material display interesting electronic properties (e.g., metallic and charge density wave properties in chalogenides and high T[sub c] superconductivity in oxides), it is intriguing to consider the potential properties of mixed compounds. During this investigation of the reactivity of Cu with varous polychalcogenide fluxes such as Na[sub 2]-Se[sub x] the authors isolated an unusual new compound Na[sub 1.9]Cu[sub 2]-Se[sub 2][sm bullet]Cu[sub 2]O (I) with unprecendented mixed Cu-Se/Cu-O features. This is the first layered oxyselenide and is composed of two alternating, independent Cu/Se and Cu/O frameworks. The synthesis, structure, and charge-transport properties of this new material are reported herein. 14 refs., 3 figs.

• OSTI ID: 7073711
• Journal Information: Chemistry of Materials; (United States), Vol. 5:1; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CRYSTAL STRUCTURE
COPPER SELENIDES
SODIUM OXIDES
CHEMICAL PREPARATION
ELECTRIC CONDUCTIVITY
MILLER INDICES
SEEBECK EFFECT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
ALKALI METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SELENIDES
SELENIUM COMPOUNDS
SODIUM COMPOUNDS
SYNTHESIS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties