Hydrothermal Synthesis and Crystal Structure of a New Sodium Yttrium Fluoride Phosphate NaYFPO4

Zhizhin, M. G.; Olenev, Andrei V.; Спиридонов, Ф. М.; Komissarova, L. N.; D'yachenko, O.G.

doi:10.1006/jssc.2000.9015

Cited by 11 publications

(10 citation statements)

References 5 publications

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“…framework is formed. The tunnels extended along the [100] and [110] directions are occupied by two types of rubidium cations with the coordination numbers of 12 and 9. As can be seen from the projection of the structure of RbFe(HPO 4 ) 2 onto the ab plane, the layers of the Fe(1) and Rb(1) atoms alternate with the layers of the Fe(2) and Rb(2) atoms and interleaved with the HPO 4 groups.…”

Section: Structures and Propertiesmentioning

confidence: 99%

“…Sodium-containing fluoride phosphates with composition NaM III FPO 4 are known only for M III = Al, REE. In the structures of the NaM III FPO 4 compounds (M III = Y, Gd ± Er), 110,111 the M III atoms are located in the [M III O 6 F 2 ] eight-vertex polyhedra (dodecahedra), the F atoms being in cis positions. The M III O 6 F 2 polyhedra are linked in infinite chains through common edges composed of two oxygen atoms.…”

Section: Structure and Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Complex phosphates containing mono- and trivalent cations

Komissarova¹,

Zhizhin²,

Filaretov³

2002

Russ. Chem. Rev.

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Section: Structures and Propertiesmentioning

confidence: 99%

Section: Structure and Propertiesmentioning

confidence: 99%

Complex phosphates containing mono- and trivalent cations

Komissarova¹,

Zhizhin²,

Filaretov³

2002

Russ. Chem. Rev.

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“…The rare-earth metal phosphates have been of interest for some time [11] and our research team has been developing the chemistry of rare-earth metal phosphates [12][13][14][15][16][17]. We have utilized molten salt and solvothermal reactions to prepare a number of unique phosphate and vanadate materials [18][19][20][21][22]. Recently, we demonstrated that the monothiophosphate building block anion, [PO 3 S] 3− , could be incorporated into structures related to the layered zirconium phosphates of Clearfield [23,24].…”

Section: Introductionmentioning

confidence: 99%

Characterization and structural determination of a new sodium lanthanum phosphate thiosulfate, Na2La[PO4][S2O3]

Zhizhin

Pounds

Спиридонов

et al. 2006

Journal of Alloys and Compounds

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“…NaYFPO 4 is crystallized in the monoclinic system (space group C 2/ m ) with unit cell parameters a = 8.944(2) Å, b = 6.930(1) Å, c = 6.469(1) Å, β = 106.11(3)°, and Z = 4. Y 3+ ions are 8-fold coordinated to form the YO 6 F 2 polyhedra.…”

Section: Introductionmentioning

confidence: 99%

Photon Cascade Emission of Gd³⁺ in Na(Y,Gd)FPO₄

et al. 2008

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The VUV-vis spectroscopic properties of Gd 3+ in Na(Y,Gd)FPO 4 are reported. The photon cascade emission was observed under 8 S 7/2 f 6 G J excitation in which 6 G J f 6 P J , 6 I J emissions of Gd 3+ in the orange/red and near-IR range are followed by ultraviolet emission of 6 P J f 8 S 7/2 transitions. We demonstrate systematically the emission decays and concentration-quenching characteristics of 6 G J f 6 P J and 6 P J f 8 S 7/2 transitions under excitation into 6 G J levels. The effect of temperature on the 6 G J f 6 P J emissions is also presented. IntroductionPhosphors for excitation in the VUV (vacuum ultraviolet, wavelength λ < 200 nm, energy E > 50 000 cm -1 ) region are required for application in Hg-free fluorescent tubes and plasma display panels (PDPs). Development of VUV phosphors, especially excitation upon 147 and 172 nm (xenon discharge emission wavelength), has become an important challenge in the field of luminescent materials. There is a higher nonradiative relaxation energy loss (65% loss for a 172 nm photon), 1 which is involved in conversion of a photon with higher energy in the vacuum ultraviolet range to a photon with lower energy in the visible region. In order to improve the energy efficiency, the most feasible approach is by quantum cutting or photon cascade emission (PCE), 2,3 that is, the phosphor absorbs one vacuum ultraviolet photon and emits two or more visible photons.Early in 1957 the possibility for PCE was discussed by Dexter. 4 Since the 1970s the PCE process was first demonstrated by Pr 3+ in fluorides 5,6 and then in borates and other oxides. [7][8][9] Recently, the photon cascade emission of Gd 3+ was also observed in LiYF 4 10 and GdBaB 9 O 16 11 when Gd 3+ was excited to 6 G J states. More important, the quantum cutting can also be achieved using a combination of two lanthanide ions, for example, Gd 3+ -Eu 3+ or Gd 3+ -Nd 3+ /Tm 3+ in fluorides, and the high-lying energy levels 6 G J of Gd 3+ play a key role in these quantum cutting processes. 2,12 Fluorides usually show lower effective phonon frequencies, but they also have a crucial shortcoming. That is, they have no efficient absorption around 147/172 nm. Oxides are maybe better matrices than fluorides for VUV phosphors because of their easy preparation, better physical and chemical stability, and higher VUV absorption efficiency, but their higher phonon frequency usually causes higher nonradiative relaxation energy loss. Therefore, Na(Y,Gd)FPO 4 is selected as the host, which is expected to combine the good qualities of fluorides and oxides. This paper will focus on the photon cascade emission of Gd 3+ in Na(Y,Gd) FPO 4 . NaYFPO 4 13 is crystallized in the monoclinic system (space group C 2/m ) with unit cell parameters a ) 8.944(2) Å, b )

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Hydrothermal Synthesis and Crystal Structure of a New Sodium Yttrium Fluoride Phosphate NaYFPO4

Cited by 11 publications

References 5 publications

Complex phosphates containing mono- and trivalent cations

Complex phosphates containing mono- and trivalent cations

Characterization and structural determination of a new sodium lanthanum phosphate thiosulfate, Na2La[PO4][S2O3]

Photon Cascade Emission of Gd³⁺ in Na(Y,Gd)FPO₄

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Hydrothermal Synthesis and Crystal Structure of a New Sodium Yttrium Fluoride Phosphate NaYFPO4

Cited by 11 publications

References 5 publications

Complex phosphates containing mono- and trivalent cations

Complex phosphates containing mono- and trivalent cations

Characterization and structural determination of a new sodium lanthanum phosphate thiosulfate, Na2La[PO4][S2O3]

Photon Cascade Emission of Gd3+ in Na(Y,Gd)FPO4

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Photon Cascade Emission of Gd³⁺ in Na(Y,Gd)FPO₄