Temperature Dependent X-ray Powder Diffraction Study of Pb2,5Sb1,5O6,75

Main Article Content

Ismunandar Ismunandar
Yoni Budiman


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 a
function 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.


Download data is not yet available.

Article Details

How to Cite
Ismunandar, I., & Budiman, Y. (2016). Temperature Dependent X-ray Powder Diffraction Study of Pb2,5Sb1,5O6,75. Indonesian Journal of Physics, 13(3), 162-164. Retrieved from http://ijphysics.com/index.php/ijp/article/view/56