Solid State Characterization and Crystal Structure from X-ray Powder Diffraction of Two Polymorphic Forms of Ranitidine Base

2009 ◽  
Vol 98 (1) ◽  
pp. 146-158 ◽  
Author(s):  
Héctor Novoa de Armas ◽  
Oswald M. Peeters ◽  
Norbert Blaton ◽  
Elke Van Gyseghem ◽  
Johan Martens ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
X Ray ◽  
Polymorphic Forms ◽  
Solid State Characterization

scholarly journals Crystal structure and tautomerism of Pigment Yellow 138 determined by X-ray powder diffraction and solid-state NMR

2016 ◽  
Vol 131 ◽  
pp. 364-372 ◽  
Author(s):  
Silke D. Gumbert ◽  
Meike Körbitzer ◽  
Edith Alig ◽  
Martin U. Schmidt ◽  
Michele R. Chierotti ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
Solid State Nmr ◽  
X Ray

SYNTHESIS, MORPHOLOGY AND STRUCTURAL PROPERTIES OF (GD,ND)SR2RUCU2O8 SAMPLES

2003 ◽  
Vol 17 (04n06) ◽  
pp. 899-904 ◽  
Author(s):  
A. VECCHIONE ◽  
M. GOMBOS ◽  
C. TEDESCO ◽  
A. IMMIRZI ◽  
L. MARCHESE ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solid State ◽  
Powder Diffraction ◽  
Solid State Reaction ◽  
X Ray ◽  
Structure And Morphology ◽  
Polycrystalline Powder ◽  
Scanning Electron

NdSr 2 RuCu 2 O x material has been prepared as polycrystalline powder by solid state reaction. The compound has been investigated by synchrotron x-ray powder diffraction and scanning electron microscopy. The experimental results show that the average crystal structure is a disordered cubic perovskite with Nd and Sr cations occupying the same site and the same substitution is found for Cu and Ru atoms. A comparison between the crystal structure and morphology of this compound and the superconducting tetragonal GdSr 2 RuCu 2 O 8 is also discussed.

Synthesis and Luminescence Studies of Sm3+ Doped Ca9Y(PO4)7 Orange-Red-Emitting Phosphor

2016 ◽  
Vol 16 (4) ◽  
pp. 3695-3699 ◽  
Author(s):  
Jun Huang ◽  
Shuangping Yi ◽  
Yaomin Deng ◽  
Weiren Zhao ◽  
Jieqiang Xian
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
Critical Distance ◽  
Red Phosphor ◽  
Light Emitting ◽  
X Ray ◽  
Chromatic Properties ◽  
White Light Emitting Diodes ◽  
Red Emitting Phosphor

Ca9Y(PO4)7:Sm3+ phosphor was prepared via solid state reaction. The crystal structure of the phosphor was characterized by X-ray powder diffraction (XRD). The photoluminescence (PL) properties of Ca9Y(PO4)7:Sm3+ were investigated. The emission of the Ca9Y(PO4)7:Sm3+ phosphor consisted of some sharp emission peaks of Sm3+ centered at 563 nm, 600 nm, and 647 nm. The strongest one is located at 600 nm due to the 4G5/2–6H7/2 transition of Sm3+. The critical distance was calculated to be 10.5 Å. The chromatic properties of the sample Ca9Y(PO4)7:Sm3+ phosphor were located in the orange reddish region. The Ca9Y(PO4)7:Sm3+ phosphor may be potentially used as red phosphor for white light-emitting diodes (WLED).

scholarly journals RbCa2Nb3O10from X-ray powder data

2009 ◽  
Vol 65 (6) ◽  
pp. i44-i44 ◽  
Author(s):  
Zhen-Hua Liang ◽  
Kai-Bin Tang ◽  
Qian-Wang Chen ◽  
Hua-Gui Zheng
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Solid State Reaction ◽  
Perovskite Structure ◽  
Three Dimensional ◽  
Rietveld Analysis ◽  
Powder Diffraction Data ◽  
X Ray

Rubidium dicalcium triniobate(V), RbCa2Nb3O10, has been synthesized by solid-state reaction and its crystal structure refined from X-ray powder diffraction data using Rietveld analysis. The compound is a three-layer perovskite Dion–Jacobson phase with the perovskite-like slabs derived by termination of the three-dimensional CaNbO3perovskite structure along theabplane. The rubidium ions (4/mmmsymmetry) are located in the interstitial space.

Crystal structure of new triple molybdate AgMg3Ga(MoO4)5 from Rietveld refinement

2017 ◽  
Vol 32 (4) ◽  
pp. 255-260
Author(s):  
Irina Yu. Kotova ◽  
Aleksandra A. Savina ◽  
Elena G. Khaikina
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Three Dimensional ◽  
Polycrystalline Sample ◽  
Powder Diffraction Data ◽  
Structural Refinement ◽  
X Ray ◽  
Triple Molybdate

A polycrystalline sample of a new triple molybdate AgMg3Ga(MoO4)5 was obtained by solid-state reaction techniques. Structural refinement based on X-ray powder diffraction data showed that the crystal structure is isotypic with NaMg3In(MoO4)5 (sp. gr. P$\bar 1$). In the structure pairs of edge-shared (Mg, Ga)O6,  octahedra are connected by common vertices to form a three-dimensional framework. Large framework cavities involve Ag+ cations. The title compound was found to melt at 1079 K.

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