A Combined X-Ray Powder Diffraction and Chemical Method for the Quantitative Mineral Analysis of Geologic Samples

2015 ◽  
pp. 153-166 ◽  
Keyword(s):  
Powder Diffraction ◽  
Chemical Method ◽  
Mineral Analysis ◽  
X Ray ◽  
Geologic Samples

Chemical Constraints in Quantitative X-ray Powder Diffraction for Mineral Analysis of the Sand/Silt Fractions of Sedimentary Rocks

1988 ◽  
Vol 32 ◽  
pp. 489-496 ◽  
Author(s):  
D. K. Smith ◽  
G. G. Johnson ◽  
M. J. Kelton ◽  
C. A. Andersen
Keyword(s):  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Intensity Ratio ◽  
Sedimentary Rocks ◽  
Xrd Analysis ◽  
Mineral Analysis ◽  
X Ray ◽  
Unique Approach ◽  
Mineral Mixtures ◽  
Component Phase

AbstractQuantitative X-ray powder diffraction using the complete digitized diffraction pattern has proved to be an effective approach to improving the accuracy of the analysis of complex mineral mixtures, provided representative reference patterns and accurate Reference Intensity Ratio (RIR) factors arc available for each component phase. However, chemical and structural variability of common rock-forming minerals may complicate the pattern fitting approach. A method has been developed which utilizes X-ray fluorescence chemistry of an unknown and realistic compositional ranges for component phases as constraints on the quantitative XRD analysis without significant compromise of the pattern fit. This unique approach no only yields accurate weight fractions, but also provides indications of the specific compositions of each phase present in the mixture.

NOTIZEN. Darstellung und Kristalldaten der isotypen Wismut-Oxid -Halogenide Bi5O7I und Bi5O7Br / Preparation and Crystal Data of the Isotypic Bismuth Oxide Halides Bi5O7I and Bi5O7Br

1984 ◽  
Vol 39 (1) ◽  
pp. 105-106 ◽  
Author(s):  
J. Ketterer ◽  
V. Krämer
Keyword(s):  
Powder Diffraction ◽  
Bismuth Oxide ◽  
Diffraction Data ◽  
Chemical Method ◽  
Crystal Data ◽  
Powder Diffraction Data ◽  
Wet Chemical Method ◽  
Space Group ◽  
X Ray ◽  
Wet Chemical

The title compounds were prepared (a) polycrys­talline by sintering the binary components and (b) single-crystalline by a wet chemical method. They crystallize in the space group Cmca with the lattice parameters a = 16.244(2), b - 5.342(1), c = 23.006(4) and 16.099(2), 5.296(1), 22.995(6) Å, resp. Their X-ray powder diffraction data are listed.

New horizons for the structural characterization of stainless steel slags by X-ray powder diffraction

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 61-66 ◽  
Author(s):  
B. Peplinski ◽  
B. Adamczyk ◽  
G. Kley ◽  
K. Adam ◽  
F. Emmerling ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Powder Diffraction ◽  
Structural Characterization ◽  
X Ray ◽  
New Horizons

X-ray Structure Refinement and Vibrational Spectroscopy of Ca8Gd2 (PO4)6 O2

2013 ◽  
Vol 12 (10) ◽  
pp. 719-726
Author(s):  
R. Ayadi ◽  
Mohamed Boujelbene ◽  
T. Mhiri
Keyword(s):  
Solid State ◽  
General Formula ◽  
Vibrational Spectroscopy ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Solid State Reaction ◽  
Structure Refinement ◽  
Unit Cell ◽  
Cell Group ◽  
X Ray

The present paper is interested in the study of compounds from the apatite family with the general formula Ca10 (PO4)6A2. It particularly brings to light the exploitation of the distinctive stereochemistries of two Ca positions in apatite. In fact, Gd-Bearing oxyapatiteCa8 Gd2 (PO4)6O2 has been synthesized by solid state reaction and characterized by X-ray powder diffraction. The site occupancies of substituents is0.3333 in Gd and 0.3333 for Ca in the Ca(1) position and 0. 5 for Gd in the Ca (2) position.  Besides, the observed frequencies in the Raman and infrared spectra were explained and discussed on the basis of unit-cell group analyses.

Monitoring Polymer-Assisted Mechanochemical Cocrystallisation Through in Situ X-Ray Powder Diffraction

2020 ◽  
Author(s):  
Luzia S. Germann ◽  
Sebastian T. Emmerling ◽  
Manuel Wilke ◽  
Robert E. Dinnebier ◽  
Mariarosa Moneghini ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Powder Diffraction ◽  
Reaction Rate ◽  
Polymer Additives ◽  
Time Resolved ◽  
X Ray

Time-resolved mechanochemical cocrystallisation studies have so-far focused solely on neat and liquid-assisted grinding. Here, we report the monitoring of polymer-assisted grinding reactions using <i>in situ</i> X-ray powder diffraction, revealing that reaction rate is almost double compared to neat grinding and independent of the molecular weight and amount of used polymer additives.<br>

Sign in / Sign up

Export Citation Format

Share Document