The low-temperature superstructures of 1T-TaSe 2 and 2H-TaSe 2
Abstract
The structure of the low-temperature form of 1T-TaSe 2 has been studied by X-ray diffraction. The symmetry of this form is triclinic (a = b = 12.54 Å; c = 9.36 Å; α = 101.9°; β = 43.8°; γ = 120°) , but twinning suggests trigonal symmetry. The content of the triclinic cell is Ta 13Se 26, the 13 Ta atoms forming a star-of-David-shaped cluster. It is proposed that the structure of the low-temperature form of 2H-TaSe 2 contains clusters of 7 Ta atoms.
- Publication:
-
Physica B+C
- Pub Date:
- January 1980
- DOI:
- 10.1016/0378-4363(80)90209-0
- Bibcode:
- 1980PhyBC..99...51B