Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Indonesian Journal of Physics (IJP)
Yoni Budiman
Departemen Kimia FMIPA Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40132, Indonesia
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Temperature Dependent X-ray Powder Diffraction Study of Pb2,5Sb1,5O6,75 Ismunandar Ismunandar; Yoni Budiman
Indonesian Journal of Physics Vol 13 No 3 (2002): Vol. 13 No.3, Juli 2002
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (781.964 KB)

Abstract

It has been reported that Pb2,5Sb1,5O6,75 adopts an ideal pyrochlore structure at room temperature and transforms to a weberite structure at high temperature. In order to study the structure transformation, structures of Pb2,5Sb1,5O6,75 as afunction of temperature (25°C < T < 950 °C) have been studied using in-situ diffraction techniques. The structures were determined from X-ray powder diffraction data using the Rietveld analysis. No structural phase transitions were observed in the range 25°C to 750°C, so the structure of Pb2,5Sb1,5O6,75 was concluded to be an ideal pyrochlore structure. The cubic lattice parameter increases linearly from a = 10,6924(5) Å to 10,7521(10) Å. Diffraction patterns above 850°C can be indexed in a related orthorhombic structure indicating n possible weberite structure. Thermal analysis using DTA & TGA of Pb2,5Sb1,5O6,75 showed that the change at 850oC were accompanied by a weight loss. From the weight loss, it can be concluded that the orthorhombic phase has the composition of Pb2Sb2O6.
Co-Authors Ismunandar Ismunandar