Mineralogy Database

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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Found 7 Records, Sorted by D1 using 1.54056 - CuKa1 for 2θ WHERE (d1 > 2.8616 AND d1 < 2.9784)
D1
Å (2θ)
I1
%)
D2
Å (2θ)
I2
(%)
D3
Å (2θ)
I3
(%)
Mineral Formula
2.866(31.18) 200 3.164(28.18) 200 5.700(15.53) 200 Batisivite (Ti,V,Cr)14Ba[Si2O7]O22
2.880(31.03) 200 4.280(20.74) 200 4.500(19.71) 180 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38
2.880(31.03) 180 5.680(15.59) 180 3.380(26.35) 170 Romanite (Fe++,U,Pb)2(Ti,Fe+++)O4
2.900(30.81) 200 4.960(17.87) 200 4.086(21.73) 180 Bityite CaLiAl2(AlBeSi2)O10(OH)2
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)2ยท(H2O)

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