Sử dụng Rietveld trong phân tích cấu trúc Fe3O4 được tổng hợp bằng phương pháp thủy nhiệt

Bùi Thị Thái, Nguyễn Xuân Hoàn


Magnetite powders have been prepared by hydrothermal reaction of Fe2+/Fe3+ in the alkaline solution at 1500C. X-ray powder diffraction pattern indicates that the product is single-phase magnetite in an inverse spinel structure. Its composition and crystal structure is determined by Rietveld refinement method combined with Differential Thermal Analysis and Thermal Gravimetry Analysis (DTA-TG). Crytal data: Fe3O4, cubic, Fd-3m, a = 8.379(7) Å,   V = 588.43 Å3.