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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 |
| 24.720(3.57) | 200 | 23.200(3.81) | 80 | 6.822(12.97) | 74 | Kalifersite | (K,Na)5Fe+++7Si20O50(OH)6·12(H2O) |
| 24.800(3.56) | 200 | 6.680(13.24) | 50 | 12.380(7.13) | 18 | Ajoite | (K,Na)3Cu20Al3Si29O76(OH)16·~8(H2O) |
| 24.934(3.54) | 200 | 8.312(10.63) | 104 | 5.348(16.56) | 26 | Coalingite | Mg10Fe+++2(CO3)(OH)24·2(H2O) |
| 24.986(3.53) | 200 | 6.472(13.67) | 178 | 6.247(14.17) | 108 | Aravaipaite | Pb3AlF9·(H2O) |
| 25.000(3.53) | 200 | 6.280(14.09) | 50 | 5.400(16.40) | 28 | Ganophyllite | (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O) |
| 25.000(3.53) | 200 | 20.600(4.29) | 90 | 10.400(8.50) | 84 | Tokkoite | K2Ca4[Si7O18(OH)](F,OH) |
| 25.140(3.51) | 200 | 6.320(14.00) | 80 | 6.854(12.91) | 30 | Zakharovite | Na4Mn++5Si10O24(OH)6·6(H2O) |
| 25.200(3.50) | 200 | 5.380(16.46) | 180 | 4.920(18.01) | 150 | Tamaite | (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112·21(H2O) |
| 25.200(3.50) | 200 | 10.580(8.35) | 140 | 12.360(7.15) | 140 | Hydrobasaluminite | Al4(SO4)(OH)10·12-36(H2O) |
| 25.260(3.49) | 200 | 10.820(8.16) | 70 | 15.640(5.65) | 70 | Peisleyite | Na3Al16(SO4)2(PO4)10(OH)17·20(H2O) |
| 25.400(3.48) | 200 | 6.100(14.51) | 160 | 5.780(15.32) | 140 | Tacharanite | Ca12Al2Si18O33(OH)36 |
| 25.540(3.46) | 200 | 5.536(16.00) | 180 | 16.700(5.29) | 140 | Schoonerite | Fe++2ZnMnFe+++(PO4)3(OH)2·9(H2O) |
| 25.542(3.46) | 200 | 6.280(14.09) | 100 | 7.262(12.18) | 100 | Gerdtremmelite | ZnAl2(AsO4)(OH)5 |
| 25.600(3.45) | 200 | 9.528(9.27) | 68 | 5.260(16.84) | 58 | Kankite | Fe+++AsO4·3.5(H2O) |
| 25.620(3.45) | 200 | 12.900(6.85) | 140 | 5.142(17.23) | 120 | Adamsite-(Y) | NaY(CO3)2·6(H2O) |
| 25.640(3.44) | 200 | 15.570(5.67) | 160 | 12.638(6.99) | 80 | Walkerite | Ca16(Mg,Li,[ ])2[B13O17(OH)12]4Cl6·28(H2O) |
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