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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 |
| 2.970(30.06) | 200 | 19.540(4.52) | 200 | 6.340(13.96) | 200 | Brammallite | (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] |
| 2.972(30.04) | 200 | 4.100(21.66) | 200 | 4.300(20.64) | 200 | Niggliite | PtSn |
| 2.974(30.02) | 200 | 3.186(27.98) | 200 | 5.800(15.26) | 180 | Shuiskite | Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) |
| 2.988(29.88) | 200 | 5.840(15.16) | 160 | 16.600(5.32) | 120 | Chrysocolla | (Cu,Al)2H2Si2O5(OH)4·n(H2O) |
| 2.990(29.86) | 200 | 2.408(37.31) | 180 | 5.660(15.64) | 140 | Luanheite | Ag3Hg |
| 3.006(29.70) | 200 | 5.144(17.22) | 200 | 4.914(18.04) | 140 | Preiswerkite | NaMg2Al3Si2O10(OH)2 |
| 3.012(29.63) | 200 | 4.970(17.83) | 200 | 2.966(30.10) | 180 | Manganoneptunite | KNa2Li(Mn,Fe++)2Ti2Si8O24 |
| 3.016(29.59) | 200 | 6.040(14.65) | 200 | 3.586(24.81) | 140 | Calciotantite | Ca(Ta,Nb)4O11 |
| 3.022(29.53) | 200 | 5.200(17.04) | 180 | 10.400(8.50) | 170 | Takeuchiite | Mg2Mn+++O2(BO3) |
| 3.032(29.43) | 200 | 4.326(20.51) | 200 | 6.380(13.87) | 200 | Babefphite | BaBe(PO4)(F,O) |
| 3.038(29.38) | 200 | 5.200(17.04) | 200 | 9.040(9.78) | 160 | Chromphyllite | (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 |
| 3.040(29.36) | 200 | 9.120(9.69) | 200 | 30.800(2.87) | 200 | Nontronite | Na0.3Fe+++2(Si,Al)4O10(OH)2·n(H2O) |
| 3.044(29.32) | 200 | 4.820(18.39) | 200 | 6.720(13.16) | 180 | Shirokshinite | K(NaMg2)Si4O10F2 |
| 3.060(29.16) | 200 | 9.160(9.65) | 200 | 31.600(2.79) | 160 | Hectorite | Na0,3(Mg,Li)3Si4O10(OH)2 |
| 3.060(29.16) | 5.220(16.97) | 7.820(11.31) | Kurumsakite | (Zn,Ni,Cu)8Al8V2Si5O35·27(H2O) (?) | |||
| 3.078(28.99) | 200 | 3.608(24.65) | 200 | 5.880(15.05) | 200 | Tazheranite | CaTiZr2O8 |
| 3.080(28.97) | 200 | 5.340(16.59) | 200 | 30.800(2.87) | 200 | Sauconite | Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) |
| 3.080(28.97) | 200 | 5.160(17.17) | 200 | 5.760(15.37) | 120 | Pyrope | Mg3Al2(SiO4)3 |
| 3.080(28.97) | 200 | 7.180(12.32) | 200 | 8.720(10.14) | 200 | Neotocite | (Mn,Fe++)SiO3·(H2O) (?) |
| 3.080(28.97) | 200 | 4.700(18.87) | 120 | 5.320(16.65) | 120 | Mcgovernite | Mn9Mg4Zn2As2Si2O17(OH)14 |
| 3.080(28.97) | 200 | 5.160(17.17) | 200 | 5.760(15.37) | 120 | Majorite | Mg3(Fe,Al,Si)2(SiO4)3 |
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