Ammonium fluorolanthanates: solid state synthesis, infrared spectral and X-ray diffraction data

1977 ◽  
Vol 55 (14) ◽  
pp. 2620-2627 ◽  
Author(s):  
Krishnan Rajeshwar ◽  
Etalo A. Secco
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Diffraction Data ◽  
Decomposition Product ◽  
Solid State Synthesis ◽  
Synthesis Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Final Decomposition Product ◽  
Infrared Spectral

Solid state synthesis of thirteen ammonium fluorolanthanates is reported. Two main types of fluorolanthanates appeared in the primary synthesis reaction, viz. NH4LnF4 and (NH4)3Ln2F9.The final decomposition product of the fluorolanthanates is LnF3 with NH4Ln2F7 appearing as an intermediate in (NH4)3Ln2F9 decomposition.Infrared absorption spectra and X-ray diffraction data for the stable fluorolanthanates are presented.

Solid state synthesis of LiFePO4 studied by in situ high energy X-ray diffraction

2011 ◽  
Vol 21 (15) ◽  
pp. 5604 ◽  
Author(s):  
Zonghai Chen ◽  
Yang Ren ◽  
Yan Qin ◽  
Huiming Wu ◽  
Shengqian Ma ◽  
...  
Keyword(s):  
Solid State ◽  
High Energy ◽  
Solid State Synthesis ◽  
X Ray Diffraction ◽  
X Ray

Niobium-bearing arsenides and germanides from elemental mixtures not involving niobium: a new twist to an old problem in solid-state synthesis

2018 ◽  
Vol 74 (5) ◽  
pp. 623-627 ◽  
Author(s):  
Sviatoslav Baranets ◽  
Hua He ◽  
Svilen Bobev
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Diffraction Data ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Temperature Reactions ◽  
First Time ◽  
Synthetic Work

Three isostructural transition-metal arsenides and germanides, namely niobium nickel arsenide, Nb0.92(1)NiAs, niobium cobalt arsenide, NbCoAs, and niobium nickel germanide, NbNiGe, were obtained as inadvertent side products of high-temperature reactions in sealed niobium containers. In addition to reporting for the very first time the structures of the title compounds, refined from single-crystal X-ray diffraction data, this article also serves as a reminder that niobium containers may not be suitable for the synthesis of ternary arsenides and germanides by traditional high-temperature reactions. Synthetic work involving alkali or alkaline-earth metals, transition or early post-transition metals, and elements from groups 14 or 15 under such conditions may yield Nb-containing products, which at times could be the major products of such reactions.

Crystal Structure of the New Phosphate AgMnPO4

2009 ◽  
Vol 64 (7) ◽  
pp. 875-878 ◽  
Author(s):  
Hamdi Ben Yahia ◽  
Etienne Gaudin ◽  
Jacques Darriet
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Reaction Route ◽  
X Ray ◽  
Solid State Reaction Route ◽  
Symmetry Space ◽  
Symmetry Space Group ◽  
Silver Atoms

The new compound AgMnPO4 has been synthesized by a solid-state reaction route. Its crystal structure was determined from single-crystal X-ray diffraction data. AgMnPO4 crystallizes with triclinic symmetry, space group P1̄, a = 9.6710(6), b = 5.695(2), c = 6.629(3) Å , α = 102.55(3), β = 105.85(2), γ = 80.70(2)◦, and Z = 4. Its structure is built up from MnO6, MnO5 and PO4 polyhedra forming tunnels filled with silver atoms.

Structure and conformational analysis of a bidentate pro-ligand, C21H34N2S2, from powder synchrotron diffraction data and solid-state DFTB calculations

2009 ◽  
Vol 65 (5) ◽  
pp. 639-646 ◽  
Author(s):  
Edward E. Ávila ◽  
Asiloé J. Mora ◽  
Gerzon E. Delgado ◽  
Ricardo R. Contreras ◽  
Luis Rincón ◽  
...  
Keyword(s):  
Solid State ◽  
Diffraction Data ◽  
Density Functional ◽  
Simulated Annealing Algorithm ◽  
Theoretical Calculations ◽  
Tight Binding ◽  
Van Der Waals Interactions ◽  
Am1 Calculations ◽  
X Ray Diffraction ◽  
X Ray

The molecular and crystalline structure of ethyl 1′,2′,3′,4′,4a′,5′,6′,7′-octahydrodispiro[cyclohexane-1,2′-quinazoline-4′,1′′-cyclohexane]-8′-carbodithioate (I) was solved and refined from powder synchrotron X-ray diffraction data. The initial model for the structural solution in direct space using the simulated annealing algorithm implemented in DASH [David et al. (2006). J. Appl. Cryst. 39, 910–915] was obtained performing a conformational study on the fused six-membered rings of the octahydroquinazoline system and the two spiran cyclohexane rings of (I). The best model was chosen using experimental evidence from 1H and 13C NMR [Contreras et al. (2001). J. Heterocycl. Chem. 38, 1223–1225] in combination with semi-empirical AM1 calculations. In the refined structure the two spiran rings have the chair conformation, while both of the fused rings in the octahydroquinazoline system have half-chair conformations compared with in-vacuum density-functional theory (DFT) B3LYP/6-311G*, DFTB (density-functional tight-binding) theoretical calculations in the solid state and other related structures from X-ray diffraction data. Compound (I) presents weak intramolecular hydrogen bonds of the type N—H...S and C—H...S, which produce delocalization of the electron density in the generated rings described by graph symbols S(6) and S(5). Packing of the molecules is dominated by van der Waals interactions.

Solid-state structural properties of 2,4,6-trimethoxybenzene derivatives, determined directly from powder X-ray diffraction data in conjunction with other techniques

2006 ◽  
Vol 179 (10) ◽  
pp. 3214-3223 ◽  
Author(s):  
Zhigang Pan ◽  
Mingcan Xu ◽  
Eugene Y. Cheung ◽  
James A. Platts ◽  
Kenneth D.M. Harris ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Properties ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
X Ray

Crystal Structures of New Compounds Na0.5Sm4.5Ti4O15 and Na0.5Eu4.5Ti4O15

2011 ◽  
Vol 415-417 ◽  
pp. 468-471
Author(s):  
Qiao Hong Yu ◽  
Zheng Fa Li ◽  
Yong Xiang Li ◽  
Ping Zhan Si ◽  
Jiang Ying Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Diffraction Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ordinary Temperature ◽  
Europium Titanate ◽  
New Compounds

New compounds of sodium samarium titanate Na0.5Sm4.5Ti4O15and sodium europium titanate Na0.5Eu4.5Ti4O15were synthesized successfully by solid state reaction at 1300 oC and 1200 oC, respectively. The lattice parameters of Na0.5Sm4.5Ti4O15and Na0.5Eu4.5Ti4O15were determined at ordinary temperature by using X-ray powder diffraction method. Their Lattice types were determined, and their patterns were indexed. Polycrystalline X-ray diffraction data of sodium samarium titanate were listed. Differences of their crystal structures were analyzed and discussed.

Structure and Magnetostriction of Tb0.7Pr0.3FeX Prepared by Solid-State Synthesis

2012 ◽  
Vol 476-478 ◽  
pp. 1459-1462 ◽  
Author(s):  
H.Y Yin ◽  
J.J Liu ◽  
R Wang ◽  
X.C Liu ◽  
N.K Sun ◽  
...  
Keyword(s):  
Solid State ◽  
Mechanical Alloying ◽  
Annealing Process ◽  
Laves Phase ◽  
Type Structure ◽  
Solid State Synthesis ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
X Ray ◽  
Magnetoelastic Properties

Mechanical alloying (MA) was used to prepare pseudobinary high Pr-content Tb0.7Pr0.3Fex alloys. The structural and magnetoelastic properties were in investigated by means of x-ray diffraction and a standard strain technique. A single (Tb,Pr)Fe2 Laves phase with MgCu2-type structure for the composition Tb0.7Pr0.3Fe1.80 was synthesized by MA and subsequent annealing process. The high magnetostriction of 600 ppm was achieved at 10 kOe for the epoxy-bonded Tb0.7Pr0.3Fe1.8 composite.

X-ray diffraction data for a distorted brockite and its solid state reactions with Na2CO3

1983 ◽  
Vol 93 (2) ◽  
pp. 433-440 ◽  
Author(s):  
M. Kizilyalli ◽  
D.S. Jones ◽  
N. Evi̇n ◽  
H. Göktürk
Keyword(s):  
Solid State ◽  
Diffraction Data ◽  
Solid State Reactions ◽  
X Ray Diffraction ◽  
X Ray
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