Table 1 Summary of monazite reference material compositions

EPMA data (in wt.%)

SiO₂

1.75

0.15

b.d.l.

b.d.l.

0.09

0.06

1.36

0.43

CaO

0.80

0.07

0.06

0.03

0.07

0.03

0.77

0.16

1.59

0.26

P₂O₅

28.14

0.59

31.27

0.55

31.28

0.64

31.06

0.69

28.52

0.96

ThO₂

9.97

0.63

0.29

0.12

0.23

0.12

2.68

0.51

11.22

1.56

Laser ablation ICP-MS data (in ppm)

Sr

43

48

2621

1411

2025

855

49

13

92

61

Y

8003

793

316

162

251

124

20,001

2903

2516

1067

La

92,007

4678

190,112

7619

204,141

6424

112,386

9276

117,092

4161

Ce*

236,997

3471

300,642

2143

299,541

2863

232,399

6615

225,543

9634

Pr

28,301

2303

26,713

1577

25,385

1275

29,371

2854

24,364

1135

Nd

95,954

4318

73,100

5891

64,889

3697

113,330

5557

83,776

3952

Sm

19,714

1153

4720

794

3506

463

21,131

2072

11,425

1014

Eu

132

11

822

170

549

114

2315

434

202

36

Gd

11,395

681

2261

354

1707

236

16,830

2211

6082

510

Tb

1432

118

113

29

78

17

1924

220

388

53

Dy

5918

376

230

89

155

54

7877

1070

1059

231

Ho

723

51

19

8

14

6

908

150

115

40

Er

1467

101

41

11

36

9

1358

232

178

73

Tm

157

17

0.9

0.5

0.8

0.5

95

23

10

6

Yb

757

120

3.3

1.5

2.6

1.3

342

104

41

26

Lu

73

16

0.3

0.2

0.2

0.1

29

9

3.4

2.2

U

2046

174

2.3

1.4

2.9

3.3

3764

991

1738

560

Pb

4914

384

35

12

25

16

795

157

8258

1255