Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/boms/028/03/0299-0301

Green pigment; monazite; diffuse reflectance spectroscopy; PrPO₄.

Rare earth based materials have recently attracted considerable attention as potential eco-friendly colourants for low temperature as well as high temperature applications. In the present study, we have synthesized a series of Ca-doped PrPO₄ compounds with the general formula, Pr_1–𝑥Ca_𝑥PO₄ (𝑥 = 0–0.4 in steps of 0.1) and characterized the compounds by powder X-ray diffraction. All the compositions show a monoclinic monazite structure. The optical properties of the brilliantly coloured pigments [𝐿 (brightness), $a^{\ast}$ (+ red - green), $b^{\ast}$ (+ yellow - blue)] have been examined. These materials can find application as potential green colourants.

V Sivakumar¹ U V Varadaraju¹

1. Materials Science Research Centre and Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India

Published

June 2005

Manuscript received

31 March 2005