Mineralogy Database

X-Ray Diffraction Table

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Minerals Arranged by X-Ray Powder Diffraction

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Powder X-ray Diffraction (XRD) is one of the primary techniques used by mineralogists and solid state chemists to examine the physico-chemical make-up of unknown materials. This data is represented in a collection of single-phase X-ray powder diffraction patterns for the three most intense D values in the form of tables of interplanar spacings (D), relative intensities (I/Io), mineral name and chemical formulae

The XRD technique takes a sample of the material and places a powdered sample in a holder, then the sample is illuminated with x-rays of a fixed wave-length and the intensity of the reflected radiation is recorded using a goniometer. This data is then analyzed for the reflection angle to calculate the inter-atomic spacing (D value in Angstrom units - 10-8 cm). The intensity(I) is measured to discriminate (using I ratios) the various D spacings and the results are compared to this table to identify possible matches. Note: 2 theta (Θ) angle calculated from the Bragg Equation, 2 Θ = 2(arcsin(n λ/(2d)) where n=1

For more information about this technique, see X-Ray Analysis of a Solid or take an internet course at Birkbeck College On-line Courses.  Many thanks to Frederic Biret for these data.

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Found 106 Records, Sorted by D1 using 1.54056 - CuKa1 for 2θ WHERE (d1 > 4.9 AND d1 < 5.1)
Å (2θ)
Å (2θ)
Å (2θ)
Mineral Formula
5.100(17.37) 200 2.998(29.78) 160 5.980(14.80) 140 Franklinite (Zn,Mn++,Fe++)(Fe+++,Mn+++)2O4
5.100(17.37) 200 5.780(15.32) 180 5.200(17.04) 160 Nierite Si3N4
5.100(17.37) 200 8.320(10.62) 200 24.600(3.59) 200 Stilpnomelane K(Fe++,Mg,Fe+++)8(Si,Al)12(O,OH)27┬Ěn(H2O)
5.100(17.37) 200 7.780(11.36) 200 5.620(15.76) 160 Fiedlerite Pb3Cl4F(OH)2
5.100(17.37) 200 6.780(13.05) 92 9.720(9.09) 74 Schwertmannite Fe+++16O16(OH)12(SO4)2

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