Crystal structure, thermal expansion, dielectric permittivity and phase transitions of Bi2S3

• Autorzy: Łukaszewicz K. , Stępień-Damm J. , Pietraszko A. , Kajokas A. , Grigas J.
• Języki publikacji: EN

Abstrakty

EN

The crystal structure of Bi2S3 both natural (bismuthinite) and synthetic, reported in the literature, was determined at ambient temperature in the non-polar space group Pbnm. Physical properties of Bi2S3 indicate, however, on the possible phase transitions both in yhe high and low temperature regions. Precise lattice parameters measured as a function of temperature have shown weak anomalies at 160 and 410 K. The phase transition above 400 K has been also confirmed by measurements of microwave dielectric permittivity along the c-axis. The crystal structure of Bi2S3 has been determined at 130, 295 and 460 K. At all three temperature the crystal structure was successfully refined in the space group Pbnm. The weak phase transitions observed in Bi2S3 apparently do not change the symmetry, or these changes are too small to be deducted at the present level of accuracy of the X-ray crystal structure determination.

Słowa kluczowe

EN

Bi2S3; bismuthinite; thermal expansion; microwave dielectric permitivity; crystal structure; weak phase transition

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1999
• Tom: vol. 73 nr 3
• Strony: 541--546

Twórcy

autor

Łukaszewicz K.

autor

Stępień-Damm J.

autor

Pietraszko A.

autor

Kajokas A.

autor

Grigas J.

• Instytut Wysokich Temperatur i Badań Strukturalnych PAN ul. Okólna 2 50-950 Wrocław