High pressure induced coordination evolution in chain compound Li{sub 2}CuO{sub 2}

Journal Article · Sun Nov 15 04:00:00 EST 2009 · Journal of Solid State Chemistry

OSTI ID:21372390

Shujie, You; Zhi, Li; Liuxiang, Yang; Cheng, Dong; Liangcheng, Chen ^[1]; Jingzhu, Hu ^[2]; Shen, Guoyin; Hokwang, Mao ^[3]

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1. Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190 (China)
2. National Synchrotron Light Source, Brookhaven National Lab, Uptown (United States)
3. HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne (United States)

Using diamond anvil cell technique with angle dispersive X-ray diffraction (ADXD) of synchrotron radiation and electrical conductivity measurements, we have observed that CuO{sub 2} chain compound Li{sub 2}CuO{sub 2} transforms from ambient orthorhombic symmetry into a new phase at above 5.4 GPa and room temperature. The new phase was found to be of monoclinic structure with an increased oxygen coordination number of Cu{sup 2+} from four at ambient to six at high pressure that provides a structural basis of the evolution of principle physical properties. The high pressure phase of Li{sub 2}CuO{sub 2} is discussed in line with the first principle calculations. - Graphical abstract: Li{sub 2}CuO{sub 2} undergoes a first-order transition from the ambient orthorhombic to a monoclinic phase at above 5.4 GPa with coordination change from four-square to six-octahedron.

• OSTI ID: 21372390
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 11 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALKALI METAL COMPOUNDS
BREMSSTRAHLUNG
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COORDINATION NUMBER
COPPER COMPOUNDS
COPPER IONS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUPRATES
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
IONS
LITHIUM COMPOUNDS
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE RANGE
PRESSURE RANGE GIGA PA
RADIATIONS
SCATTERING
SYNCHROTRON RADIATION
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION