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 57 Records, Sorted by D1 using 1.54056 - CuKa1 for 2θ WHERE (d1 > 17.9732 AND d1 < 18.7068)
D1
Å (2θ)
I1
%)
D2
Å (2θ)
I2
(%)
D3
Å (2θ)
I3
(%)
Mineral Formula
18.000(4.91) 200 6.266(14.12) 160 9.400(9.40) 100 Ranunculite HAl(UO2)(PO4)(OH)3·4(H2O)
18.020(4.90) 200 10.480(8.43) 160 6.480(13.65) 120 Zincobotryogen (Zn,Mg,Mn)Fe+++(SO4)2(OH)·7(H2O)
18.040(4.89) 200 10.640(8.30) 160 8.700(10.16) 120 Strunzite Mn++Fe+++2(PO4)2(OH)2·6(H2O)
18.060(4.89) 200 8.080(10.94) 90 6.060(14.61) 50 Stellerite CaAl2Si7O18·7(H2O)
18.060(4.89) 200 7.600(11.63) 180 6.540(13.53) 160 Chernikovite (H3O)2(UO2)2(PO4)2·6(H2O)
18.060(4.89) 200 7.520(11.76) 120 14.400(6.13) 80 Klyuchevskite-Duplicate K3Cu3Fe+++O2(SO4)4
18.060(4.89) 200 6.020(14.70) 140 5.280(16.78) 110 Deerite (Fe++,Mn)6(Fe+++,Al)3Si6O20(OH)5
18.060(4.89) 200 7.520(11.76) 120 14.400(6.13) 80 Klyuchevskite K3Cu3(Fe+++,Al)O2(SO4)4
18.060(4.89) 200 8.980(9.84) 180 7.226(12.24) 80 Kambaldaite NaNi4(CO3)3(OH)3·3(H2O)
18.080(4.88) 200 8.140(10.86) 190 6.080(14.56) 140 Stilbite-Na Na3Ca3[Al8Si28O72]·n(H2O) (n=28-32)
18.080(4.88) 200 11.660(7.58) 160 23.400(3.77) 160 Slavikite NaMg2Fe+++5(SO4)7(OH)6·33(H2O)
18.080(4.88) 200 18.300(4.82) 168 7.562(11.69) 74 Alumoklyuchevskite K3Cu3AlO2(SO4)4
18.080(4.88) 200 8.140(10.86) 190 6.080(14.56) 140 Stilbite-Ca NaCa4[Al8Si28O72]·n(H2O) (n=28-32)
18.100(4.88) 200 3.840(23.14) 160 8.880(9.95) 160 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2·7(H2O)
18.100(4.88) 200 3.840(23.14) 160 8.880(9.95) 160 Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O) (x=0.7)
18.120(4.87) 200 7.160(12.35) 160 11.160(7.92) 160 Ferricopiapite Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)
18.120(4.87) 200 8.000(11.05) 140 6.960(12.71) 90 Mordenite (Ca,Na2,K2)Al2Si10O24·7(H2O)
18.140(4.87) 200 21.400(4.13) 200 6.060(14.61) 60 Wightmanite Mg5(BO3)O(OH)5·2(H2O)
18.144(4.87) 200 16.476(5.36) 180 6.190(14.30) 140 Hubeite Ca2Mn++Fe+++Si4O12(OH)(H2O)2
18.160(4.86) 200 36.400(2.43) 160 4.036(22.01) 80 Metavoltine K4Na4(Fe++,Zn)Fe+++6(SO4)12O2·20(H2O)
18.160(4.86) 200 7.574(11.67) 160 6.300(14.05) 140 Mazzite-Na Na8Al8Si28O72·30H2O
18.190(4.85) 200 5.830(15.18) 184 7.944(11.13) 152 Alflarsenite NaCa2Be3Si4O13(OH)·2H2O
18.200(4.85) 200 6.638(13.33) 180 13.280(6.65) 130 Nekoite Ca3Si6O15·7(H2O)
18.200(4.85) 200 7.588(11.65) 100 9.390(9.41) 72 Metazellerite Ca(UO2)(CO3)2·3(H2O)
18.200(4.85) 200 6.900(12.82) 160 6.960(12.71) 130 Kingite Al3(PO4)2(F,OH)2·8(H2O,OH)
18.240(4.84) 200 5.614(15.77) 70 13.240(6.67) 40 Probertite NaCaB5O7(OH)4·3(H2O)
18.260(4.84) 200 9.132(9.68) 160 6.092(14.53) 52 Pseudojohannite Cu6.5[(UO2)4O4(SO4)2]2(OH)5·25H2O
18.280(4.83) 200 18.680(4.73) 200 9.520(9.28) 54 Chistyakovaite Al(UO2)2(AsO4)2(F,OH)·6.5H2O
18.280(4.83) 200 6.680(13.24) 160 7.680(11.51) 160 Abernathyite K(UO2)(AsO4)·4(H2O)
18.280(4.83) 200 8.840(1-) 120 9.112(9.70) 120 Haiweeite Ca[(UO2)2Si5O12(OH)2]·3(H2O)
18.300(4.82) 200 5.620(15.76) 100 9.200(9.61) 80 Jahnsite-(CaMnFe) CaMn++Fe++2Fe+++2(PO4)4(OH)2·8(H2O)
18.320(4.82) 200 5.680(15.59) 160 5.840(15.16) 160 Inesite Ca2Mn7Si10O28(OH)2·5(H2O)
18.320(4.82) 200 5.814(15.23) 120 5.608(15.79) 100 Willhendersonite KCaAl3Si3O12·5(H2O)
18.354(4.81) 200 9.176(9.63) 64 6.118(14.47) 30 Lemanskiite NaCaCu5(AsO4)4Cl·5H2O
18.360(4.81) 200 15.820(5.58) 160 6.500(13.61) 130 Howieite Na(Fe++,Mn++)10(Fe,Al)2Si12O31(OH)13
18.366(4.81) 200 2.148(42.03) 42 6.512(13.59) 32 Menezesite Ba2MgZr4(BaNb12O42)·12H2O
18.400(4.80) 200 19.200(4.60) 200 7.800(11.33) 140 Bukovskyite Fe+++2(AsO4)(SO4)(OH)·7(H2O)
18.400(4.80) 200 10.120(8.73) 120 10.820(8.16) 100 Sinkankasite H2MnAl(PO4)2(OH)·6(H2O)
18.400(4.80) 200 11.160(7.92) 160 36.200(2.44) 160 Aluminocopiapite Al2/3Fe+++4(SO4)6O(OH)2·20(H2O)
18.436(4.79) 200 5.638(15.70) 140 5.186(17.08) 50 Jahnsite-(NaFeMg) NaFe+++Mg2Fe+++2(PO4)4(OH)2·8H2O
18.460(4.78) 200 36.800(2.40) 200 11.140(7.93) 140 Copiapite Fe++Fe+++4(SO4)6(OH)2·20(H2O)
18.500(4.77) 200 12.240(7.22) 160 7.120(12.42) 120 Zincocopiapite ZnFe+++4(SO4)6(OH)2·18(H2O)
18.540(4.76) 200 9.700(9.11) 50 4.560(19.45) 40 Uramarsite (NH4,H3O)2(UO2)2(AsO4,PO4)2·6H2O
18.540(4.76) 200 5.650(15.67) 160 9.820(9.00) 120 Jahnsite-(CaMnMg) CaMnMg2Fe+++2(PO4)4(OH)2·8(H2O)
18.540(4.76) 200 4.878(18.17) 160 7.380(11.98) 140 Shabynite Mg5(BO3)Cl2(OH)5·4(H2O)
18.540(4.76) 200 5.562(15.92) 160 5.882(15.05) 140 Whiteite-(CaFeMg) Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2·8(H2O)
18.560(4.76) 200 9.284(9.52) 100 5.668(15.62) 70 Jahnsite-(CaFeFe) (Ca,Mn)(Fe++,Mn++)Fe++2Fe+++2(PO4)4(OH)2·8(H2O)
18.560(4.76) 200 6.902(12.82) 160 6.188(14.30) 160 IMA2009-008 Y2[(UO2)8O6(SO4)4(OH)2]·26H2O
18.580(4.75) 200 9.280(9.52) 180 8.520(10.37) 160 Sarmientite Fe+++2(AsO4)(SO4)(OH)·5(H2O)
18.580(4.75) 200 37.140(2.38) 180 11.200(7.89) 160 Magnesiocopiapite MgFe+++4(SO4)6(OH)2·20(H2O)
18.600(4.75) 200 12.560(7.03) 180 9.780(9.03) 120 Levinsonite-(Y) (Y,Nd,La)Al(SO4)2(C2O4)·12(H2O)
18.600(4.75) 200 5.720(15.48) 140 3.440(25.88) 120 Englishite K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)
18.620(4.74) 200 5.580(15.87) 160 9.700(9.11) 100 Whiteite-(CaMnMg) CaMn++Mg2Al2(PO4)4(OH)2·8(H2O)
18.640(4.74) 200 5.560(15.93) 180 5.900(15.00) 100 Whiteite-(MnFeMg) (Mn++,Ca)(Fe++,Mn++)Mg2Al2(PO4)4(OH)2·8(H2O)
18.680(4.73) 200 14.180(6.23) 100 7.094(12.47) 80 Janggunite Mn++++5-x(Mn++,Fe+++)1+xO8(OH)6, x = 0,2
18.698(4.72) 200 6.412(13.80) 80 6.214(14.24) 60 Meurigite-Na [Na(H2O)2.5][Fe+++8(PO4)6(OH)7(H2O)4]
18.700(4.72) 200 3.060(29.16) 110 9.180(9.63) 90 Talc Mg3Si4O10(OH)2

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