The synthesis and properties of the hexachloroniobates and hexachlorotantalates of Na, K, Rb, and Cs

1978 ◽  
Vol 56 (15) ◽  
pp. 2013-2018 ◽  
Author(s):  
Donald R. Sadoway ◽  
S. N. Flengas
Keyword(s):  
Alkali Metal ◽  
Phase Transformations ◽  
Powder Diffraction ◽  
Closed System ◽  
Metal Chloride ◽  
Alkali Metal Chloride ◽  
X Ray ◽  
Diffraction Patterns

The compounds NaNbCl6, NaTaCl6, KNbCl6, KTaCl6, RbNbCl6, RbTaCl6, CsNbCl6, and CsTaCl6, were synthesized in a closed system by the reaction of NbCl5 or TaCl5 vapour with solid alkali-metal chloride as follows[Formula: see text]where M is Nb or Ta, and A is Na, K, Rb, or Cs. The X-ray powder diffraction patterns of these compounds were obtained. Temperatures of various phase transformations were determined cryoscopically.

scholarly journals THE SYNTHESIS AND PROPERTIES OF THE ANHYDROUS HEXACHLOROZIRCONATES OF SODIUM AND POTASSIUM

1964 ◽  
Vol 42 (5) ◽  
pp. 1102-1105 ◽  
Author(s):  
R. L. Lister ◽  
S. N. Flengas
Keyword(s):  
Alkali Metal ◽  
Closed System ◽  
Metal Chloride ◽  
X Ray Diffraction ◽  
Zirconium Tetrachloride ◽  
Melting Points ◽  
Alkali Metal Chloride ◽  
X Ray ◽  
Diffraction Patterns ◽  
Sodium And Potassium

The hexachlorozirconates of sodium and potassium have been produced in a closed system following the reaction:[Formula: see text]where M is Na and K, respectively. The zirconium tetrachloride was reacted at approximately 1 atm. pressure, and at temperatures of the alkali metal chloride between 425 °C and 525 °C. The densities, melting points, and the corresponding X-ray diffraction patterns for both compounds have been determined.

Two examples of quantitative analysis by simulated X-ray powder diffraction patterns

Clay Minerals ◽  
1982 ◽  
Vol 17 (4) ◽  
pp. 393-399
Author(s):  
C. E. Corbato ◽  
R. T. Tettenhorst
Keyword(s):  
Quantitative Analysis ◽  
Pattern Matching ◽  
Powder Diffraction ◽  
X Ray ◽  
Quantitative Estimates ◽  
Powder Diffractometer ◽  
Alternative Method ◽  
Two Samples ◽  
Natural Mixture ◽  
Diffraction Patterns

AbstractQuantitative estimates were made by visually matching computer-simulated with experimental X-ray powder diffractometer patterns for two samples. One was a natural mixture of dickite and nacrite in about equal proportions. The second sample contained mostly quartz with corundum and mullite in small (0.5–1%) amounts. Percentages deduced from pattern matching agreed to within ±10% of the weight fractions of the components determined by an alternative method of analysis.

The crystal structures of solvent-free alkali-metal squarates from powder diffraction data

2005 ◽  
Vol 220 (11) ◽  
Author(s):  
Robert E. Dinnebier ◽  
Hanne Nuss ◽  
Martin Jansen
Keyword(s):  
High Resolution ◽  
Alkali Metal ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Room Temperature ◽  
Solvent Free ◽  
Crystallographic Data ◽  
Powder Diffraction Data ◽  
X Ray

AbstractThe crystal structures of solvent-free lithium, sodium, rubidium, and cesium squarates have been determined from high resolution synchrotron and X-ray laboratory powder patterns. Crystallographic data at room temperature of Li

Synchrotron X-ray studies of metal-organic framework M2(2,5-dihydroxyterephthalate), M = (Mn, Co, Ni, Zn) (MOF74)

2012 ◽  
Vol 27 (4) ◽  
pp. 256-262 ◽  
Author(s):  
W. Wong-Ng ◽  
J. A. Kaduk ◽  
H. Wu ◽  
M. Suchomel
Keyword(s):  
Powder Diffraction ◽  
Metal Organic Framework ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Lattice Parameter ◽  
X Ray ◽  
Metal Organic ◽  
Sorbent Materials ◽  
Diffraction Patterns ◽  
Unsaturated Metal Sites

M2(dhtp)·nH2O (M = Mn, Co, Ni, Zn; dhtp = 2,5-dihydroxyterephthalate), known as MOF74, is a family of excellent sorbent materials for CO2 that contains coordinatively unsaturated metal sites and a honeycomb-like structure featuring a broad one-dimensional channel. This paper describes the structural feature and provides reference X-ray powder diffraction patterns of these four isostructural compounds. The structures were determined using synchrotron diffraction data obtained at beam line 11-BM at the Advanced Photon Source (APS) in the Argonne National Laboratory. The samples were confirmed to be hexagonal R 3 (No. 148). From M = Mn, Co, Ni, to Zn, the lattice parameter a of MOF74 ranges from 26.131 73(4) Å to 26.5738(2) Å, c from 6.651 97(5) to 6.808 83(8) Å, and V ranges from 3948.08 Å3 to 4163.99 Å3, respectively. The four reference X-ray powder diffraction patterns have been submitted for inclusion in the Powder Diffraction File (PDF).

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