Quantitative determination of mineral composition by powder x-ray diffraction

Title: Quantitative determination of mineral composition by powder x-ray diffraction

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Abstract

An external standard intensity ratio method is used for quantitatively determining mineralogic compositions of samples by x-ray diffraction. The method uses ratios of x-ray intensity peaks from a single run. Constants are previously determined for each mineral which is to be quantitatively measured. Ratios of the highest intensity peak of each mineral to be quantified in the sample and the highest intensity peak of a reference mineral contained in the sample are used to calculate sample composition.

Inventors:: Pawloski, G.A.

Issue Date:: 1984-08-10

Research Org.:: Lawrence Livermore National Lab., CA (USA)

OSTI Identifier:: 5619792

Application Number:: ON: DE85011654

Assignee:: Dept. of Energy EDB-85-087912

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; QUANTITATIVE CHEMICAL ANALYSIS; X-RAY DIFFRACTION; MINERALS; CHEMICAL ANALYSIS; COHERENT SCATTERING; DIFFRACTION; SCATTERING; 440300* - Miscellaneous Instruments- (-1989)

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                    Pawloski, G.A. Quantitative determination of mineral composition by powder x-ray diffraction.  United States: N. p., 1984. 
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                    Pawloski, G.A. Quantitative determination of mineral composition by powder x-ray diffraction.  United States.

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                    Pawloski, G.A. Fri .  
        "Quantitative determination of mineral composition by powder x-ray diffraction".  United States.

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@article{osti_5619792,

  title        = {Quantitative determination of mineral composition by powder x-ray diffraction},

  author       = {Pawloski, G.A.},

  abstractNote = {An external standard intensity ratio method is used for quantitatively determining mineralogic compositions of samples by x-ray diffraction. The method uses ratios of x-ray intensity peaks from a single run. Constants are previously determined for each mineral which is to be quantitatively measured. Ratios of the highest intensity peak of each mineral to be quantified in the sample and the highest intensity peak of a reference mineral contained in the sample are used to calculate sample composition.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1984},

  month        = {8}

}

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Quantitative determination of mineral composition by powder X-ray diffraction

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A method is described of quantitatively determining the mineral composition in a test sample containing a number (m) of minerals from a group (n) of known minerals, wherein n=13, where mless than or equal ton, by x-ray diffraction, comprising: determining from standard samples of the known minerals a set of (n) standard coefficients K/sub j/=(X/sub j//X/sub l/)(I/sub l//I/sub j/) for each mineral (j=2...n) in the group of known minerals (j=2...n) relative to one mineral (l) in the group selected as a reference mineral, where X is the weight fraction of the mineral in a standard sample, and I is themore »« less
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An external standard intensity ratio method is used for quantitatively determining mineralogic compositions of samples by x-ray diffraction. The method uses ratios of x-ray intensity peaks from a single run. Constants are previously determined for each mineral which is to be quantitatively measured. Ratios of the highest intensity peak of each mineral to be quantified in the sample and the highest intensity peak of a reference mineral contained in the sample are used to calculate sample composition.
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This paper describes the external-standard-intensity method of x-ray diffraction which provides a rapid routine quantification of geologic samples. Various geologic materials were analyzed by this method of different crystal classes, grain sizes, and chemical composition. The results are compared for accuracy and variations.
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DOI: 10.1154/1.3659285

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