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Table 2 XRD phase analysis results of trace samples in Cave 256

From: Blue pigments in Cave 256, Mogao Grottoes: a systematic analysis of murals and statues in Five dynasties, Song Dynasty and Qing Dynasty

No.

M256-01

M256-03

M256-04

M256-05

Lazurite (17–0749)

Azurite (11–0682)

Atacamite (25–0269)

d

I/I0

d

I/I0

d

I/I0

d

I/I0

d

I/I0

d

I/I0

d

I/I0

1

9.420

9.361

51

16.223

5.480

54

8.727

10.131

75

16.137

5.494

56

13.761

6.430

40

17.204

5.150

55

16.161

5.480

100

2

10.590

8.465

18

17.033

5.181

77

9.337

9.418

64

17.653

5.040

30

18.239

4.860

6

17.443

5.080

30

17.618

5.030

70

3

13.694

6.441

11

17.697

5.018

36

12.323

7.151

42

20.903

4.258

19

19.537

4.540

18

17.760

4.990

11

21.928

4.050

12

4

17.480

5.076

11

24.240

3.675

99

17.133

5.176

56

21.857

4.063

17

23.966

3.71

100

24.205

3.674

50

31.520

2.836

50

5

18.953

4.682

15

25.193

3.534

79

20.860

4.263

42

24.283

3.657

20

24.992

3.56

6

25.310

3.516

100

32.184

2.779

50

6

19.393

4.571

12

26.667

3.343

33

21.077

4.212

40

26.580

3.345

100

25.955

3.430

6

28.709

3.107

11

32.424

2.759

55

7

23.999

3.704

11

28.660

3.112

34

24.067

3.693

51

27.620

3.227

18

27.769

3.21

16

34.604

2.590

11

32.630

2.742

25

8

26.623

3.346

15

30.957

2.886

36

25.150

3.534

41

29.483

3.027

19

29.454

3.030

6

35.307

2.540

25

33.014

2.711

20

9

28.530

3.123

100

32.375

2.771

47

26.493

3.368

59

31.563

2.838

41

31.115

2.872

45

35.553

2.523

20

33.915

2.641

14

10

29.440

3.030

53

34.597

2.595

30

28.443

3.127

69

32.170

2.781

45

32.472

2.755

4

35.743

2.510

35

35.524

2.525

14

11

30.957

2.886

16

35.244

2.543

34

29.440

3.037

71

35.680

2.516

20

34.168

2.622

80

35.846

2.503

30

35.670

2.515

40

12

36.070

2.490

14

35.680

2.512

38

30.913

2.891

31

39.667

2.267

37

37.009

2.427

16

38.506

2.336

17

39.527

2.278

70

13

39.450

2.281

12

38.453

2.341

100

32.343

2.766

37

42.440

2.127

19

39.636

2.272

25

39.151

2.299

13

39.763

2.265

45

14

43.307

2.093

18

39.147

2.301

55

39.407

2.287

39

44.433

2.037

26

42.173

2.141

35

39.365

2.287

35

41.029

2.198

17

15

44.520

2.033

12

39.840

2.265

62

39.753

2.266

44

50.067

1.825

26

51.222

1.782

30

39.763

2.265

25

42.401

2.130

25

16

47.597

1.190

15

40.533

2.227

42

43.133

2.095

35

50.977

1.791

21

57.322

1.606

20

40.528

2.224

70

44.300

2.043

17

17

48.723

1.872

20

46.557

1.948

43

44.867

20.020

33

53.403

1.716

20

59.219

1.559

10

41.623

2.168

15

49.960

1.824

35

18

57.433

1.604

9

49.980

1.824

40

47.467

1.917

43

57.220

1.609

19

61.164

1.514

10

46.584

1.948

20

50.166

1.817

25

19

60.727

1.525

8

57.780

1.595

30

48.507

1.675

44

67.747

1.382

77

62.963

1.475

14

49.960

1.824

17

53.310

1.717

20

20

64.887

1.437

11

64.757

1.438

30

49.937

1.827

100

67.963

1.378

47

68.423

1.370

18

57.743

1.595

15

57.322

1.606

55