Synthesis and Crystal Structure Refinement of One- and Two-Layer Hydrates of Sodium-Fluorohectorite

2012 ◽  
Vol 638 (10) ◽  
pp. 1611-1611
Author(s):  
Hussein Kalo ◽  
Wolfgang Milius ◽  
Josef Breu
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Crystal Structure Refinement ◽  
Synthesis And Crystal Structure

Water-based sol–gel synthesis and crystal structure refinement of lanthanum silicate apatite

2008 ◽  
Vol 179 (38) ◽  
pp. 2209-2215 ◽  
Author(s):  
K KOBAYASHI ◽  
Y MATSUSHITA ◽  
N IGAWA ◽  
F IZUMI ◽  
C NISHIMURA ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Sol Gel ◽  
Crystal Structure Refinement ◽  
Synthesis And Crystal Structure ◽  
Water Based ◽  
Sol Gel Synthesis ◽  
Lanthanum Silicate

Synthesis and crystal structure refinement by the Rietveld method of antimony-bearing titanite Ca(Ti0.6Al0.2Sb0.2)OSiO4

2009 ◽  
Vol 24 (3) ◽  
pp. 221-227
Author(s):  
Fernando Colombo ◽  
Elisa V. Pannunzio Miner
Keyword(s):  
Crystal Structure ◽  
Long Range ◽  
Rietveld Method ◽  
Structure Refinement ◽  
Unit Cell ◽  
Synthetic Analogue ◽  
Crystal Structure Refinement ◽  
Synthesis And Crystal Structure ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

A synthetic analogue, Ca(Ti0.6Al0.2Sb0.2)OSiO4, of antimony-bearing titanite of a composition similar to that found at St. Marcel-Praborna (Italy) was synthesized using ceramic methods and the crystal structure was refined using the Rietveld method. Unit-cell dimensions (in Å) are a=7.0184(1), b=8.7097(2), c=6.5586(1), and β=113.700(1)°. The substitution of 40% Ti by (Al+Sb) in octahedra causes a loss of long-range coherency of the off-centered Ti atoms. The space group of Sb-bearing titanite is A2/a, like other cases of M3+-M5+-doped titanites. This study confirms that titanite with up to 0.2 Sb atom per f.u. can exist and that the substitution scheme is 2Ti4+↔Al3++Sb5+.

scholarly journals Synthesis, Crystal Structure and Characterization of Cu2 (PO4) (OH)

2009 ◽  
Vol 5 (2) ◽  
pp. 685-694
Author(s):  
R. Ayadi ◽  
Mohamed Boujelbene ◽  
T. Mhiri
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Hydrogen Bonds ◽  
Vibrational Spectroscopy ◽  
Structure Refinement ◽  
Crystal Structure Refinement ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Anisotropic Displacement Parameters

This paper reports the hydrothermal synthesis and crystal structure refinement of cuivre phosphate hydroxide,  Cu 2 (PO4) (OH), obtained at 453 K.Its structure consists of chains of edge-sharing, distorted [CuO4 (OH)2] octahedral extending parallel to [001]. These chains are cross linked by isolated PO4 tetrahedra through corner-sharing, forming channels in which dimmers of edge-sharing [CuO4 (OH)] trigonal bipyramids are located. The structure is stabilized by medium to weak O-H…O hydrogen bonds. In contrast to the previous refinement single crystal X-ray and analysis of data from vibrational spectroscopy, all non –H atoms were refined with anisotropic displacement parameters and the H atom was located.

Synthesis and crystal structure refinement of Cu(I)Ti2(PO4)3

1987 ◽  
Vol 22 (10) ◽  
pp. 1421-1426 ◽  
Author(s):  
E.M. McCarron ◽  
J.C. Calabrese ◽  
M.A. Subramanian
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Crystal Structure Refinement ◽  
Synthesis And Crystal Structure
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