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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 |
| 10.340(8.54) | 200 | 5.280(16.78) | 180 | 5.260(16.84) | 140 | Ikaite | CaCO3·6(H2O) |
| 10.340(8.54) | 200 | 6.518(13.57) | 116 | 5.680(15.59) | 54 | Pararsenolamprite | As |
| 10.360(8.53) | 200 | 24.000(3.68) | 120 | 5.814(15.23) | 100 | Zodacite | Ca4Mn++Fe+++4(PO4)6(OH)4·12(H2O) |
| 10.380(8.51) | 200 | 8.620(10.25) | 140 | 10.820(8.16) | 140 | Boralsilite | Al16B6Si2O27 |
| 10.440(8.46) | 200 | 4.460(19.89) | 100 | 7.480(11.82) | 80 | Anyuiite | Au(Pb,Sb)2 |
| 10.440(8.46) | 200 | 5.910(14.98) | 160 | 16.120(5.48) | 120 | Haidingerite | Ca(AsO3OH)·(H2O) |
| 10.440(8.46) | 200 | 7.080(12.49) | 160 | 8.760(10.09) | 100 | Metastudtite | UO4·2(H2O) |
| 10.460(8.45) | 200 | 10.860(8.13) | 160 | 9.960(8.87) | 150 | Werdingite | (Mg,Fe)2Al14B4Si4O37 |
| 10.460(8.45) | 200 | 5.920(14.95) | 180 | 7.180(12.32) | 160 | Komkovite | BaZrSi3O9·3(H2O) |
| 10.460(8.45) | 200 | 6.040(14.65) | 68 | 3.634(24.48) | 62 | Calciohilairite | CaZrSi3O9·3(H2O) |
| 10.460(8.45) | 200 | 20.918(4.22) | 164 | 6.972(12.69) | 108 | Christelite | Zn3Cu2(SO4)2(OH)6·4(H2O) |
| 10.480(8.43) | 200 | 17.680(4.99) | 120 | 6.502(13.61) | 80 | Ilinskite | NaCu5O2(SeO3)2Cl |
| 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 |
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