Effect of the cation size on the framework structures of magnesium tungstate, A4Mg(WO4)3 (A = Na, K), R2Mg2(WO4)3 (R = Rb, Cs)

2015 ◽  
Vol 44 (12) ◽  
pp. 5810-5817 ◽  
Author(s):  
Shujuan Han ◽  
Ying Wang ◽  
Qun Jing ◽  
Hongping Wu ◽  
Shilie Pan ◽  
...  
Keyword(s):  
High Temperature ◽  
Alkali Metal ◽  
Single Crystal ◽  
High Temperature Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Solution ◽  
Cation Size

A series of alkali metal magnesium tungstates, A4Mg(WO4)3 (A = Na, K), R2Mg2(WO4)3 (R = Rb, Cs), were synthesized from a high temperature solution, and their structures were determined by single-crystal X-ray diffraction.

Pb3Ba3Zn6(BO3)8 and α-BaZn2(BO3)2: new members of the zincoborates containing two different dimensional Zn–O units

2020 ◽  
Vol 7 (1) ◽  
pp. 101-107
Author(s):  
Xiaobo Pan ◽  
Hongping Wu ◽  
Shichao Cheng ◽  
Zhengping Wang
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Solution Method ◽  
High Temperature Solution ◽  
X Ray Diffraction ◽  
New Members ◽  
X Ray ◽  
Temperature Solution ◽  
First Time

Two new zincoborates, namely, Pb3Ba3Zn6(BO3)8 and α-BaZn2(BO3)2, were synthesized by the high-temperature solution method and their structures were determined by single-crystal X-ray diffraction for the first time.

Synthesis, crystal structure and luminescence properties of a new samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2

2020 ◽  
Vol 76 (12) ◽  
pp. 1068-1075
Author(s):  
Dan Zhao ◽  
Lin-Ying Shi ◽  
Rui-Juan Zhang ◽  
Ya-Li Xue
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Three Dimensional ◽  
High Temperature Solution ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Temperature Solution ◽  
Light Excitation ◽  
Total Structure

A new caesium sodium samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2, has been obtained successfully by the high-temperature solution growth (HTSG) method and single-crystal X-ray diffraction analysis reveals that it crystallizes in the orthorhombic space group Cmcm. The structure contains BO3, PO4, NaO7 and SmO7 polyhedra which are interconnected via corner- or edge-sharing O atoms to form a three-dimensional [Na2Sm2(BO3)(PO4)2]∞ network. This network delimits large cavities where large Cs+ cations reside to form the total structure. Under 402 nm light excitation, CsNa2Sm2(BO3)(PO4)2 exhibits three emission bands due to the 4f→4f transitions of Sm3+. Furthermore, we introduced Gd3+ into Sm3+ sites to optimize the Sm3+ concentration and improve the luminescence intensity. The optimal concentration is Gd/Sm = 98/2. The luminescent lifetime of a series of CsNa2Gd2(1–x)Sm2x (BO3)(PO4)2 phosphors shows a gradual degradation of lifetime from 2.196 to 0.872 ms for x = 0.01–0.10. The Commission Internationale de l'Eclairage (CIE) 1931 calculation reveals that CsNa2Gd1.96Sm0.04(BO3)(PO4)2 can emit orange light under 402 nm excitation.

Synthesis and characterization of three new rare-earth orthoborates: Ba2MgY2(BO3)4, Ba2CdY2(BO3)4, and Ba2CdSc(BO3)3

2020 ◽  
Vol 49 (31) ◽  
pp. 10874-10879
Author(s):  
Runqing Liu ◽  
Hongping Wu ◽  
Hongwei Yu ◽  
Zhanggui Hu ◽  
Jiyang Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Solution Method ◽  
Synthesis And Characterization ◽  
High Temperature Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Solution ◽  
First Time

Three rare-earth orthoborates Ba2MgY2(BO3)4, Ba2CdY2(BO3)4, and Ba2CdSc(BO3)3 were synthesized via a high-temperature solution method and their structures were determined by single crystal X-ray diffraction for the first time.

scholarly journals Effect of neodymium doping on structural, microscopic and electrical properties of barium phosphate system

2014 ◽  
Vol 04 (02) ◽  
pp. 1450007 ◽  
Author(s):  
Shivani Suri ◽  
Vishal Singh ◽  
K. K. Bamzai
Keyword(s):  
Electrical Properties ◽  
Single Crystal ◽  
Stoichiometric Composition ◽  
Solution Technique ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Temperature Solution ◽  
Flower Type ◽  
Phosphate System

Neodymium-doped barium phosphate (NdBP) was prepared as single crystal by room temperature solution technique known as gel encapsulation technique. Single crystal X-ray diffraction shows that the crystal belongs to orthorhombic system. The flower type morphology was observed by scanning electron microscope (SEM) and the stoichiometric composition of the prepared crystal was observed by energy dispersive X-ray analysis (EDAX). The presence of functional group and other groups was studied by Fourier transform infrared spectroscopy (FTIR). The electrical properties of these materials like dielectric constant (ε′), dielectric loss (tanδ) and ac conductivity [ln(σac)] was studied at different temperatures ranging from 40°C to 420°C in the frequency range of 5 kHz to 1 MHz. The activation energy values decreases with increase in frequency suggesting that the conduction mechanism is because of hopping of charge carriers.

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