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- Title
Na<sub>3</sub>Sm(PO<sub>4</sub>)<sub>2</sub>: (3+1)-dimensional commensurately modulated structure model and photoluminescence properties.
- Authors
Zhang, Rui-Juan; Zhao, Dan; Zhong, Qiu; Xue, Ya-Li; Huang, Guang-Xu
- Abstract
For the first time, we determined the detailed crystal structure of Na3Sm(PO4)2 using single crystal X-ray diffraction and established the commensurately modulated structure model using the superspace formalism. The structure adopts a (3+1)-dimensional superspace group Pca21(0β0)000 with the modulation vector q=1/3b*. At the same time, the photoluminescent properties of Na3Sm(PO4)2 sintered at different temperatures between 800 and 1200°C were studied. Under near-UV excitation (402 nm), Na3Sm(PO4)2 shows intense characteristic emission bands of Sm3+ (561, 596, 642 nm) with the CIE coordinate of (0.5709, 0.4282), corresponding to orange color. The excitation spectrum covers a wide range from 350 nm to 470 nm, which indicates that Na3Sm(PO4)2 can be efficiently activated by near-UV or visuable LED ship.
- Subjects
SINGLE crystals; PHOTOLUMINESCENCE; EXCITATION spectrum; X-ray diffraction; COMMENSURATE-incommensurate transitions
- Publication
Zeitschrift für Kristallographie. Crystalline Materials, 2019, Vol 234, Issue 5, p281
- ISSN
2194-4946
- Publication type
Article
- DOI
10.1515/zkri-2018-2095