Hydrothermal Synthesis, Crystal Structures, and Thermal Stabilities of Two New Zinc Phosphonates with a Layered and a 3D Framework Structures

2009 ◽  
pp. NA-NA
Author(s):  
Xin Lu ◽  
Jing Li ◽  
Zhen-Gang Sun ◽  
Da-Peng Dong ◽  
Rui-Nian Hua ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystal Structures ◽  
Thermal Stabilities ◽  
3D Framework

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.

ChemInform Abstract: Hydrothermal Synthesis, Crystal Structures and Characterization of New Vanadoborates: The Novel Decorated Cage Cluster [V6B22O44(OH)10].

ChemInform ◽  
2013 ◽  
Vol 44 (27) ◽  
pp. no-no
Author(s):  
Xing Liu ◽  
Jian Zhou ◽  
Litao An ◽  
Rong Chen ◽  
Feilong Hu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystal Structures ◽  
The Novel

Hydrothermal Synthesis of Open-Framework Borophosphates with Tunable Micropore Sizes, Crystal Morphologies, and Thermal Stabilities

2015 ◽  
Vol 15 (8) ◽  
pp. 3594-3601 ◽  
Author(s):  
Wei Sun ◽  
Ya-Xi Huang ◽  
Sergiy Nokhrin ◽  
Yuanming Pan ◽  
Jin-Xiao Mi
Keyword(s):  
Hydrothermal Synthesis ◽  
Thermal Stabilities ◽  
Open Framework

Hydrothermal Synthesis and Crystal Structures of Li,Ba-Nanoborate, LiBaB9O15, and Ba-Borophosphate, BaBPO5.

ChemInform ◽  
2003 ◽  
Vol 34 (11) ◽  
Author(s):  
D. Yu. Pushcharovsky ◽  
E. R. Gobetchia ◽  
M. Pasero ◽  
S. Merlino ◽  
O. V. Dimitrova
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystal Structures
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