Na2La2B10O19: A New Lanthanum Sodium Borate with Infinite 2D Layer (_∞﷩2﷩[B_10 O_19 ]^(8-)and Moderate Birefringence

2021 ◽  
Author(s):  
Chengfa Wu ◽  
Junwei Feng ◽  
Feng Yu
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Sodium Borate ◽  
Two Dimensional ◽  
High Temperature Solution ◽  
Spontaneous Crystallization ◽  
Space Group ◽  
Layer 2 ◽  
Rare Earth Borate ◽  
Temperature Solution

A new rare earth borate Na2La2B10O19 was successfully synthesized by spontaneous crystallization in high temperature solution. It crystallizes in the centrosymmetric (CS) space group C2/c with an infinite two-dimensional (2D)...

Cation ordering in the double tungstate LiFe(WO4)2

2012 ◽  
Vol 68 (2) ◽  
pp. i7-i8 ◽  
Author(s):  
Marjorie Albino ◽  
Stanislav Pechev ◽  
Philippe Veber ◽  
Matias Velazquez ◽  
Michael Josse
Keyword(s):  
High Temperature ◽  
Cation Ordering ◽  
Monoclinic Space Group ◽  
High Temperature Solution ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Double Tungstate ◽  
Growth Method ◽  
Temperature Solution ◽  
Expected Values

Single crystals of lithium iron tungstate, LiFe(WO4)2, were obtained using a high-temperature solution growth method. The analysis was conducted using the monoclinic space groupC2/c, with β = 90.597 (2)°, givingR1 = 0.0177. The Li and Fe atoms lie on twofold axes. The structure can also be refined using the orthorhombic space groupCmcm, giving slightly higher residuals. The experimental value of β and the residuals mitigate in favour of the monoclinic description of the structure. Calculated bond-valence sums for the present results are closer to expected values than those obtained using the results of a previously reported analysis of this structure.

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.

The Mo2FeB2- and Mn2AlB2-Type Modifications of RE2Ni2Cd (Re = La, Pr, Nd, Sm, Tb, Dy)

2005 ◽  
Vol 60 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Thomas Fickenscher ◽  
Ute C. Rodewald ◽  
Dirk Niepmann ◽  
Ratikanta Mishra ◽  
Marcus Eschen ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Low Temperature ◽  
Rare Earth Metal ◽  
High Frequency ◽  
Earth Metal ◽  
Two Dimensional ◽  
Space Group ◽  
X Ray ◽  
Sample Chamber

The rare earth metal (RE)-nickel-cadmium intermetallics RE2Ni2Cd (RE = La, Pr, Nd, Sm, Tb, Dy) were prepared from the elements in sealed niobium or tantalum tubes in a water-cooled sample chamber of a high-frequency furnace. They crystallize with a tetragonal Mo2FeB2 type low-temperature modification, space group P4/mbm, and an orthorhombic Mn2AlB2 type hightemperature modification, space group Cmmm. The cadmium compounds were characterized through their X-ray powder patterns. Five structures of the low-temperature modifications were refined from X-ray single crystal diffractometer data: α = 763.76(9), c = 387.26(8) pm, wR2 = 0.046, 205 F2 for La2Ni1.67(1)Cd; α = 752.93(7), c = 380.95(6) pm, wR2 = 0.061, 260 F2 for Pr2Ni2Cd; α = 750.88(9), c = 378.33(7) pm, wR2 = 0.051, 195 F2 for Nd2Ni2Cd; α = 743.6(1), c = 374.0(1) pm, wR2 = 0.036, 386 F2 for Sm2Ni1.93(1)Cd; α = 734.9(1), c = 366.1(2) pm, wR2 = 0.030, 252 F2 for Dy2Ni1.94(1)Cd, with 13(12) variables per refinement. The 4g nickel site is only fully occupied in the neodymium and the praseodymium compound. Both modifications can be considered as intergrowths of distorted AlB2 and CsCl related slabs. In both modification the nickel and cadmium atoms build up two-dimensional [Ni2Cd] networks. In the low-temperature modifications the nickel atoms form pairs, while nickel zig-zag chains occur in the high-temperature modifications. These nickel fragments are condensed via the cadmium atoms. The crystal chemistry and the chemical bonding in these intermetallics is discussed

RbPb8O4Cl9: First Alkali Metal Lead Oxyhalide with Distorted [PbO3Cl3] and [PbOCl5] Mixed-Anion Groups

2021 ◽  
Author(s):  
Zhongxu Fan ◽  
Chen Bai ◽  
Hongsheng Shi ◽  
Min Zhang ◽  
Bei Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
High Temperature ◽  
Alkali Metal ◽  
Solution Method ◽  
Three Dimensional ◽  
High Temperature Solution ◽  
Space Group ◽  
Centrosymmetric Space Group ◽  
Temperature Solution ◽  
3D Framework

A new heavy metal oxychloride, RbPb8O4Cl9, has been synthesized by high-temperature solution method. The compound crystallizes in the centrosymmetric space group P4/n (no. 85) and exhibits a three-dimensional (3D) framework...

Sn14O11Br6: A promising birefringent material with [Sn14O11Br6] layer

2021 ◽  
Author(s):  
Zixiu Lu ◽  
Fangfang Zhang ◽  
Abudukadi Tudi ◽  
Zhihua Yang ◽  
Shilie Pan
Keyword(s):  
High Temperature ◽  
Closed System ◽  
Solution Method ◽  
Two Dimensional ◽  
High Temperature Solution ◽  
Temperature Solution ◽  
First Time

The tin(Ⅱ) oxybromide, Sn14O11Br6 (TOB), was synthesized successfully via the high-temperature solution method in a closed system for the first time. Its structure displays two-dimensional [Sn14O11Br6] layers constructed from highly...

High temperature solution growth of perovskite Pb2CoWO6 single crystals

1991 ◽  
Vol 112 (1) ◽  
pp. 71-83 ◽  
Author(s):  
B.N. Sun ◽  
R. Boutellier ◽  
Ph. Sciau ◽  
E. Burkhardt ◽  
V. Rodriguez ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
Solution Growth ◽  
High Temperature Solution ◽  
Temperature Solution

scholarly journals Growth and Characterization of Centimeter-Sized Ba2LaFeNb4O15Crystals from High-Temperature Solution under a Controlled Atmosphere

2013 ◽  
Vol 2013 (15) ◽  
pp. 2817-2825 ◽  
Author(s):  
Marjorie Albino ◽  
Philippe Veber ◽  
Elias Castel ◽  
Matias Velázquez ◽  
Kurt Schenk ◽  
...  
Keyword(s):  
High Temperature ◽  
Controlled Atmosphere ◽  
High Temperature Solution ◽  
Temperature Solution
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