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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 |
| 12.092(7.30) | 200 | 6.648(13.31) | 118 | 13.830(6.39) | 52 | Vajdakite | [(MoO2)2(H2O)2As2O5]·(H2O) |
| 12.120(7.29) | 200 | 5.960(14.85) | 180 | 7.940(11.13) | 160 | Natrosilite | Na2Si2O5 |
| 12.136(7.28) | 200 | 6.530(13.55) | 180 | 6.046(14.64) | 100 | Gainesite | Na2Zr2Be(PO4)4·1-2(H2O) |
| 12.154(7.27) | 200 | 11.236(7.86) | 180 | 19.070(4.63) | 160 | Nevadaite | (Cu++,[ ],Al,V+++)6[Al8(PO4)8F8] (H2O)23 |
| 12.168(7.26) | 200 | 7.716(11.46) | 180 | 6.942(12.74) | 160 | Frolovite | CaB2(OH)8 |
| 12.202(7.24) | 200 | 11.242(7.86) | 182 | 19.030(4.64) | 134 | Cloncurryite | [Cu0.56(VO)0.44]Al2(PO4)2(F,OH)·2.5H2O) |
| 12.220(7.23) | 200 | 6.328(13.98) | 130 | 4.692(18.90) | 106 | Boehmite | AlO(OH) |
| 12.220(7.23) | 200 | 9.000(9.82) | 180 | 6.358(13.92) | 140 | Moydite-(Y) | YB(OH)4(CO3) |
| 12.280(7.19) | 200 | 8.762(10.09) | 160 | 7.032(12.58) | 120 | Kamphaugite-(Y) | (Ca1.84REEx)(Y1.46REE0.54-x)(CO3)4(OH)1.65·2(H2O) |
| 12.300(7.18) | 200 | 4.554(19.48) | 90 | 3.660(24.30) | 50 | Molybdenite | MoS2 |
| 12.316(7.17) | 200 | 6.152(14.39) | 120 | 20.360(4.34) | 80 | Mantienneite | KMg2Al2Ti(PO4)4(OH)3·15(H2O) |
| 12.322(7.17) | 200 | 6.572(13.46) | 100 | 6.078(14.56) | 60 | Selwynite | NaK(Be,Al)Zr2(PO4)4·2(H2O) |
| 12.340(7.16) | 200 | 14.900(5.93) | 200 | 7.740(11.42) | 180 | Callaghanite | Cu2Mg2(CO3)(OH)6·2(H2O) |
| 12.360(7.15) | 200 | 4.554(19.48) | 70 | 5.462(16.21) | 50 | Tungstenite | WS2 |
| 12.360(7.15) | 200 | 5.550(15.96) | 130 | 8.840(1-) | 60 | Weddellite | Ca(C2O4)·2(H2O) |
| 12.380(7.13) | 200 | 5.380(16.46) | 140 | 9.120(9.69) | 120 | Vyacheslavite | U++++(PO4)(OH)·2.5(H2O) |
| 12.400(7.12) | 200 | 20.600(4.29) | 180 | 14.920(5.92) | 160 | Paulkerrite | K(Mg,Mn)2(Fe+++,Al)2Ti(PO4)4(OH)3·15(H2O) |
| 12.400(7.12) | 200 | 4.404(20.15) | 160 | 5.314(16.67) | 150 | Szaibelyite | MgBO2(OH) |
| 12.414(7.11) | 200 | 7.788(11.35) | 190 | 6.188(14.30) | 130 | Howlite | Ca2B5SiO9(OH)5 |
| 12.416(7.11) | 200 | 4.826(18.37) | 180 | 5.980(14.80) | 180 | Grandviewite | Cu3Al9(SO4)2(OH)29 |
| 12.430(7.11) | 200 | 14.440(6.12) | 200 | 6.208(14.26) | 140 | Kaliborite | KHMg2B12O16(OH)10·4(H2O) |
| 12.460(7.09) | 200 | 6.300(14.05) | 180 | 20.800(4.24) | 180 | Matveevite | KTiMn2Fe+++2(PO4)4(OH)3·15(H2O) |
| 12.460(7.09) | 200 | 6.280(14.09) | 160 | 7.920(11.16) | 140 | Curite | Pb3+x(H2O)2[(UO2)4+x(OH)3-x]2, x~0.5 |
| 12.482(7.08) | 200 | 14.172(6.23) | 100 | 7.060(12.53) | 80 | Decrespignyite-(Y) | (Y,REE)4Cu(CO3)4Cl(OH)5·2(H2O) |
| 12.500(7.07) | 200 | 13.000(6.79) | 140 | 6.460(13.70) | 120 | Alumohydrocalcite | CaAl2(CO3)2(OH)4·3(H2O) |
| 12.520(7.05) | 200 | 6.580(13.45) | 180 | 4.940(17.94) | 160 | Lepidocrocite | FeO(OH) |
| 12.560(7.03) | 200 | 6.280(14.09) | 120 | 6.700(13.20) | 40 | Sincosite | Ca(V++++O)2(PO4)2·5(H2O) |
| 12.560(7.03) | 200 | 6.980(12.67) | 160 | 9.560(9.24) | 140 | Wakabayashilite | (As,Sb)6As4S14 |
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