Structure refinement and luminescence properties of a novel apatite-type compound Mn2Gd8(SiO4)6O2. (May 2017)

• Record Type: Journal Article
• Authors: Liu, Haikun; Liao, Libing; Zhang, Yuanyuan; Zhou, Tianshuai; Guo, Qingfeng; Li, Li; Mei, Lefu
• Is Part Of: Dyes and pigments. Volume 140(2017)
• Page Start: 87
• Page End: 91
• Publication Date: 2017-05
• Subjects: Structure refinement -- Luminescence properties -- Phosphor -- Apatite; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2017.01.033
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The structural and luminescence properties of apatite-type compound Mn2 Gd8 (SiO4 )6 O2 have been investigated. The crystal structure of Mn2 Gd8 (SiO4 )6 O2 has been obtained from the X-ray diffraction data by Rietveld method in the hexagonal system, space group P6 3 / m, a = 9.3851 Å, c = 6.7904 Å, V = 517.97 Å 3, Z = 1. The Mn2 Gd8 (SiO4 )6 O2 phase contains two cationic sites, one site ( 4f site with point symmetry C 3 ) is a distorted tricapped trigonal prismatic polyhedron formed by nine oxygen atoms, and other site ( 6h sites with point symmetry C s ) is an irregular polyhedron of pentagonal bipyramidal geometry with the coordination by seven oxygen atoms. It is found that the Mn 2+ ions occupy only 4f sites with C 3 point symmetry, that has been verified by photoluminescence spectrum and decay curves. This work provides an insight to the novel inorganic compound design and gives an impetus to discover new functional materials and develop new applications. Highlights: Novel apatite-type compound Mn2 Gd8 (SiO4 )6 O2 was successfully synthesized. The spectroscopic data and fluorescence decay indicated that the Mn 2+ only occupy 4f sites with C 3 point symmetry. This work offered an idea to design novel manganese compounds.