Hydrothermal Synthesis, Crystal Structure and Characterizations of Two New Manganese(II) Phosphonates with a 3D Framework Structure

2009 ◽  
Vol 635 (1) ◽  
pp. 171-174 ◽  
Author(s):  
Yan-Yu Zhu ◽  
Jing Li ◽  
Zhen-Gang Sun ◽  
Jing Zhang ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Framework Structure ◽  
3D Framework

Synthesis, crystal structure and luminescence properties of eight new lanthanide carboxyphosphonates with a 3D framework structure

2010 ◽  
Vol 34 (11) ◽  
pp. 2429 ◽  
Author(s):  
Na Zhang ◽  
Zhengang Sun ◽  
Yanyu Zhu ◽  
Jing Zhang ◽  
Lei Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Luminescence Properties ◽  
Framework Structure ◽  
3D Framework

An open framework crystal structure and physical properties of RbCuAl(PO4)2

2016 ◽  
Vol 45 (6) ◽  
pp. 2598-2604 ◽  
Author(s):  
Olga V. Yakubovich ◽  
Galina V. Kiriukhina ◽  
Olga V. Dimitrova ◽  
Elena A. Zvereva ◽  
Larisa V. Shvanskaya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Physical Properties ◽  
Single Crystals ◽  
Spontaneous Magnetization ◽  
Framework Structure ◽  
Hydrothermal Route ◽  
Open Framework ◽  
Lower Temperature ◽  
3D Framework

Single crystals of the RbCuAl(PO4)2 compound with an open 3D framework structure were obtained by a hydrothermal route. The compound orders antiferromagnetically at TN = 10.5 K and exhibits spontaneous magnetization at lower temperature.

Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems: synthesis and crystal structures of Rb2[(UO2)(Cr2O7)(NO3)2] and two new polymorphs of Rb2Cr3O10

2021 ◽  
Vol 236 (1-2) ◽  
pp. 11-21
Author(s):  
Evgeny V. Nazarchuk ◽  
Oleg I. Siidra ◽  
Dmitry O. Charkin ◽  
Stepan N. Kalmykov ◽  
Elena L. Kotova
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Crystal Structures ◽  
Hydrothermal Treatment ◽  
Ambient Conditions ◽  
Screw Axis ◽  
3D Framework ◽  
Solution Acidity

Abstract Three new rubidium polychromates, Rb2[(UO2)(Cr2O7)(NO3)2] (1), γ-Rb2Cr3O10 (2) and δ-Rb2Cr3O10 (3) were prepared by combination of hydrothermal treatment at 220 °C and evaporation of aqueous solutions under ambient conditions. Compound 1 is monoclinic, P 2 1 / c $P{2}_{1}/c$ , a = 13.6542(19), b = 19.698(3), c = 11.6984(17) Å, β = 114.326(2)°, V = 2867.0(7) Å3, R 1 = 0.040; 2 is hexagonal, P 6 3 / m $P{6}_{3}/m$ , a = 11.991(2), c = 12.828(3) Å, γ = 120°, V = 1597.3(5) Å3, R 1 = 0.031; 3 is monoclinic, P 2 1 / n $P{2}_{1}/n$ , a = 7.446(3), b = 18.194(6), c = 7.848(3) Å, β = 99.953(9)°, V = 1047.3(7) Å3, R 1 = 0.037. In the crystal structure of 1, UO8 bipyramids and NO3 groups share edges to form [(UO2)(NO3)2] species which share common corners with dichromate Cr2O7 groups producing novel type of uranyl dichromate chains [(UO2)(Cr2O7)(NO3)2]2−. In the structures of new Rb2Cr3O10 polymorphs, CrO4 tetrahedra share vertices to form Cr3O10 2− species. The trichromate groups are aligned along the 63 screw axis forming channels running in the ab plane in the structure of 2. The Rb cations reside between the channels and in their centers completing the structure. The trichromate anions are linked by the Rb+ cations into a 3D framework in the structure of 3. Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems is discussed.

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