Crystal Structure, Mössbauer Spectra, Thermal Expansion, and Phase Transition of Berthierite FeSb2S4

摘要: Abstract Dielectric and ultrasound measurements of berthierite FeSb 2 S 4 reported in the literature revealed a phase transition at T c =348 K. In present study was confirmed by Mossbauer spectra exhibiting anomalous behavior close to 350 Precise lattice parameters measured temperature region 305–380 K show change slope about The crystal structure has been determined using single-crystal X-ray diffraction data both room 370 above transition. is orthorhombic, Z =4. At 295 =11.412(2) A, b =3.763(1) =14.161(3) R =0.0280, =11.421(2) =3.771(1) =14.173(3) =0.0274. No symmetry observed. temperatures space group Pnma with small changes atomic interatomic distances. observed 348 is, therefore, be classified as weak going on without essential structure.