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X-Ray Diffraction Table |
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X-Ray Diffraction Table |
See Help on X-Ray Diffraction.
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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| D1 Å (2θ) |
I1 %) |
D2 Å (2θ) |
I2 (%) |
D3 Å (2θ) |
I3 (%) |
Mineral | Formula |
| 10.500(8.41) | 200 | 8.700(10.16) | 100 | 7.418(11.92) | 80 | Henmilite | Ca2Cu[B(OH)4]2(OH)4 |
| 10.540(8.38) | 200 | 11.980(7.37) | 190 | 5.800(15.26) | 140 | Nasinite | Na2B5O8(OH)·2(H2O) |
| 10.560(8.37) | 200 | 12.000(7.36) | 120 | 6.340(13.96) | 100 | Hilairite | Na2ZrSi3O9·3(H2O) |
| 10.580(8.35) | 200 | 17.880(4.94) | 160 | 6.554(13.50) | 80 | Ferrostrunzite | Fe++Fe+++2(PO4)2(OH)2·6(H2O) |
| 10.680(8.27) | 200 | 17.740(4.98) | 160 | 6.534(13.54) | 80 | Ferristrunzite | Fe+++Fe+++2(PO4)2(OH)3·5(H2O) |
| 10.680(8.27) | 200 | 5.660(15.64) | 180 | 14.740(5.99) | 160 | Euchroite | Cu2(AsO4)(OH)·3(H2O) |
| 10.740(8.23) | 200 | 6.520(13.57) | 160 | 6.788(13.03) | 160 | Narsarsukite | Na2(Ti,Fe+++)Si4(O,F)11 |
| 10.780(8.20) | 200 | 4.620(19.20) | 140 | 4.100(21.66) | 100 | Pinnoite | MgB2O4·3(H2O) |
| 10.780(8.20) | 200 | 9.880(8.94) | 180 | 6.700(13.20) | 160 | Chalcomenite | CuSeO3·2(H2O) |
| 10.800(8.18) | 200 | 4.320(20.54) | 100 | 9.520(9.28) | 80 | Vyalsovite | FeS·Ca(OH)2·Al(OH)3 |
| 10.800(8.18) | 200 | 6.380(13.87) | 180 | 5.460(16.22) | 160 | Realgar | AsS |
| 10.800(8.18) | 200 | 3.820(23.27) | 180 | 6.240(14.18) | 100 | Sulvanite | Cu3VS4 |
| 10.820(8.16) | 200 | 4.640(19.11) | 100 | 3.720(23.90) | 80 | Tochilinite | 6Fe0.9S·5(Mg,Fe++)(OH)2 |
| 10.860(8.13) | 200 | 6.600(13.40) | 160 | 11.060(7.99) | 100 | Ammonioleucite | (NH4,K)AlSi2O6 |
| 10.880(8.12) | 200 | 4.540(19.54) | 160 | 5.480(16.16) | 120 | Paratacamite | (Cu,Zn)2(OH)3Cl |
| 10.880(8.12) | 200 | 8.040(11.00) | 28 | 5.274(16.80) | 20 | Eriochalcite | CuCl2·2(H2O) |
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