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    • Environmentally benign novel green pigments: Pr1–𝑥Ca𝑥PO4 (𝑥 = 0–0.4)

      V Sivakumar U V Varadaraju

      Rapid Communication Volume 28 Issue 3 June 2005 pp 299-301

    • Fulltext

       

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

    • Keywords

       

      Green pigment; monazite; diffuse reflectance spectroscopy; PrPO4.

    • Abstract

       

      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, Pr1–𝑥Ca𝑥PO4 (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.

    • Author Affiliations

       

      V Sivakumar1 U V Varadaraju1

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

    • Dates

       
      Published
      June 2005
      Manuscript received
      31 March 2005

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