Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1590785 | Science and Technology of Advanced Materials | 2007 | 6 Pages |
Abstract
The binary phase CaSi6 is prepared at a pressure of 10(1)Â GPa and a temperature of 1520(150)Â K. X-ray single-crystal structure refinements and powder diffraction data of quenched samples reveal that the compound crystallizes in the orthorhombic crystal system (space group Cmcm, a=4.4953(5)Â Ã
, b=10.078(1)Â Ã
, c=11.469(1)Â Ã
). At ambient pressure, exothermic decomposition into CaSi2 and Si at 737(5) K indicates that the compound is a metastable high-pressure phase. Physical property measurements reveal that the new hexasilicide is diamagnetic and a bad metallic conductor, with resistivity Ïâ900 μΩ cm at 300 K.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Aron Wosylus, Yurii Prots, Ulrich Burkhardt, Walter Schnelle, Ulrich Schwarz,