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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 |
| 23.580(3.74) | 200 | 15.800(5.59) | 160 | 20.320(4.34) | 160 | Bouazzerite | Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86 |
| 23.600(3.74) | 200 | 6.560(13.49) | 140 | 6.760(13.09) | 140 | Giorgiosite | Mg5(CO3)4(OH)2·5(H2O) |
| 23.640(3.73) | 200 | 9.700(9.11) | 180 | 11.900(7.42) | 170 | Ktenasite | (Cu,Zn)5(SO4)2(OH)6·6(H2O) |
| 23.700(3.73) | 200 | 6.100(14.51) | 180 | 11.280(7.83) | 140 | Gerstleyite | Na2(Sb,As)8S13·2(H2O) |
| 23.760(3.72) | 200 | 4.920(18.01) | 180 | 5.900(15.00) | 160 | Agardite-(Ce) | (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) |
| 23.800(3.71) | 200 | 6.196(14.28) | 160 | 6.122(14.46) | 140 | Mahnertite | (Na,Ca)Cu++3(AsO4)2Cl·5(H2O) |
| 23.800(3.71) | 200 | 7.620(11.60) | 170 | 7.420(11.92) | 140 | Calcioaravaipaite | PbCa2Al(F,OH)9 |
| 23.800(3.71) | 200 | 46.200(1.91) | 200 | 18.200(4.85) | 28 | Cacoxenite | (Fe+++,Al)25(PO4)17O6(OH)12·75(H2O) |
| 23.902(3.69) | 200 | 8.380(10.55) | 140 | 6.232(14.20) | 120 | Ruizite | CaMn+++Si2O6(OH)·2(H2O) |
| 23.960(3.68) | 200 | 11.960(7.39) | 180 | 7.590(11.65) | 160 | Vanuralite | Al(UO2)2(VO4)2(OH)·11(H2O) |
| 23.960(3.68) | 200 | 11.980(7.37) | 120 | 5.934(14.92) | 100 | Slavkovite | Cu13(AsO4)6(AsO3OH)4·23(H2O) |
| 24.000(3.68) | 200 | 6.060(14.61) | 160 | 12.180(7.25) | 120 | Zeophyllite | Ca4Si3O8(OH,F)4·2(H2O) |
| 24.000(3.68) | 200 | 3.040(29.36) | 180 | 5.240(16.91) | 180 | Aliettite | [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe++)2-3(Si,Al)4O10(OH)2·n(H2O) |
| 24.000(3.68) | 200 | 4.920(18.01) | 180 | 7.140(12.39) | 160 | Mixite | BiCu6(AsO4)3(OH)6·3(H2O) |
| 24.020(3.68) | 200 | 7.200(12.28) | 160 | 4.980(17.80) | 140 | Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O) |
| 24.120(3.66) | 200 | 12.040(7.34) | 80 | 7.520(11.76) | 60 | Kimuraite-(Y) | CaY2(CO3)4·6(H2O) |
| 24.140(3.66) | 200 | 12.092(7.30) | 200 | 8.080(10.94) | 180 | Arakiite | (Zn,Mn++)(Mn++,Mg)12(Fe+++,Al)2(AsO3)(AsO4)2(OH)23 |
| 24.200(3.65) | 200 | 3.156(28.25) | 180 | 5.180(17.10) | 180 | Calcioferrite | Ca4Fe++(Fe+++,Al)4(PO4)6(OH)4·12(H2O) |
| 24.200(3.65) | 200 | 4.920(18.01) | 180 | 8.960(9.86) | 160 | Modderite | (Co,Fe)As |
| 24.200(3.65) | 200 | 21.200(4.16) | 120 | 5.800(15.26) | 100 | Navajoite | V2O5·3(H2O) |
| 24.200(3.65) | 200 | 5.960(14.85) | 160 | 13.920(6.34) | 120 | Fibroferrite | Fe+++(SO4)(OH)·5(H2O) |
| 24.200(3.65) | 200 | 5.846(15.14) | 160 | 5.936(14.91) | 160 | Caryochroite | (Na,Sr)3(Fe+++,Mg)10[Ti2Si12O37](O,OH)9·8H2O |
| 24.220(3.65) | 200 | 5.164(17.16) | 80 | 3.156(28.25) | 60 | Lennilenapeite | K6-7(Mg,Mn,Fe++,Fe+++,Zn)48(Si,Al)72(O,OH)216·16(H2O) |
| 24.260(3.64) | 200 | 5.570(15.90) | 60 | 19.960(4.42) | 44 | Teruggite | Ca4MgAs2B12O22(OH)12·12(H2O) |
| 24.380(3.62) | 200 | 6.120(14.46) | 134 | 4.902(18.08) | 62 | Peretaite | CaSb+++4O4(OH)2(SO4)2·2(H2O) |
| 24.400(3.62) | 200 | 15.500(5.70) | 160 | 12.000(7.36) | 60 | Ulexite | NaCaB5O6(OH)6·5(H2O) |
| 24.400(3.62) | 200 | 4.880(18.16) | 60 | 6.660(13.28) | 60 | Falcondoite | (Ni,Mg)4Si6O15(OH)2·6(H2O) |
| 24.400(3.62) | 200 | 5.440(16.28) | 140 | 6.072(14.58) | 120 | Vitimite | Ca6B14O19(SO4)(OH)14·5(H2O) |
| 24.520(3.60) | 200 | 7.000(12.64) | 100 | 6.100(14.51) | 40 | Hydrobiotite | [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]·[(Mg,Fe++,Al)3(Si,Al)4O10(OH)2·4(H2O)] |
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