X-Ray Diffraction Table

X-Ray Diffraction Table

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Minerals Arranged by X-Ray Powder Diffraction

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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Listing of 22 Records Sorted by D1 using 1.54056 - CuKa1 for 2θ WHERE (d1 > 12.3774 AND d1 < 12.8826)
D1
Å (2θ)
I1
%)
D2
Å (2θ)
I2
(%)
D3
Å (2θ)
I3
(%)
Mineral Formula
12.400(7.12) 100 3.340(26.67) 25 6.190(14.30) 9 Ajoite (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
12.467(7.08) 100 4.156(21.36) 52 2.674(33.48) 13 Coalingite Mg10Fe+++2(CO3)(OH)24•2(H2O)
12.493(7.07) 100 3.236(27.54) 89 3.123(28.56) 54 Aravaipaite Pb3AlF9•(H2O)
12.500(7.07) 100 3.140(28.40) 25 2.700(33.15) 14 Ganophyllite (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7•8-9(H2O)
12.500(7.07) 100 10.300(8.58) 45 5.200(17.04) 42 Tokkoite K2Ca4[Si7O18(OH)](F,OH)
12.570(7.03) 100 3.160(28.22) 40 3.427(25.98) 15 Zakharovite Na4Mn++5Si10O24(OH)6•6(H2O)
12.600(7.01) 100 6.180(14.32) 70 5.290(16.75) 70 Hydrobasaluminite Al4(SO4)(OH)10•12-36(H2O)
12.600(7.01) 100 2.460(36.49) 90 2.600(34.47) 75 Tamaite (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112•21(H2O)
12.600(7.01) 100 8.700(10.16) 100 9.650(9.16) 80 Voglite Ca2Cu(UO2)(CO3)4•6(H2O)
12.600(7.01) 100 5.290(16.75) 70 6.180(14.32) 70 Hydrobasaluminite Al4(SO4)(OH)10•12-36(H2O)
12.600(7.01) 100 2.690(33.28) 90 2.460(36.49) 75 Tamaite (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112•21(H2O)
12.630(6.99) 100 7.820(11.31) 35 5.410(16.37) 35 Peisleyite Na3Al16(SO4)2(PO4)10(OH)17•20(H2O)
12.630(6.99) 100 5.410(16.37) 35 7.820(11.31) 35 Peisleyite Na3Al16(SO4)2(PO4)10(OH)17•20(H2O)
12.690(6.96) 100 4.200(21.14) 100 2.874(31.09) 70 Stratlingite Ca2Al[(OH)6AlSiO2-3(OH)4-3]•2,5(H2O)
12.700(6.95) 100 3.050(29.26) 80 2.890(30.92) 70 Tacharanite Ca12Al2Si18O33(OH)36
12.770(6.92) 100 2.768(32.32) 90 8.350(10.59) 70 Schoonerite Fe++2ZnMnFe+++(PO4)3(OH)2•9(H2O)
12.771(6.92) 100 3.631(24.50) 50 3.140(28.40) 50 Gerdtremmelite ZnAl2(AsO4)(OH)5
12.771(6.92) 100 3.140(28.40) 50 3.631(24.50) 50 Gerdtremmelite ZnAl2(AsO4)(OH)5
12.800(6.90) 100 4.764(18.61) 34 2.630(34.06) 29 Kankite Fe+++AsO4•3.5(H2O)
12.810(6.89) 100 6.450(13.72) 70 2.571(34.87) 60 Adamsite-(Y) NaY(CO3)2•6(H2O)
12.810(6.89) 100 2.571(34.87) 70 4.290(20.69) 60 Adamsite-(Y) NaY(CO3)2•6(H2O)
12.820(6.89) 100 7.785(11.36) 80 6.319(14.00) 40 Walkerite Ca16(Mg,Li,[ ])2[B13O17(OH)12]4Cl6•28(H2O)

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