Scanning Electron Microscopy and X-Ray Microanalysis

327 20

a 350 000

b

300 000

250 000

200 000

150 000

100 000

50 000

0

0.0 1.0 2.0 3.0 4.0 5.0

Photon energy (keV)

Counts

6.0 7.0 8.0 9.0 10.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

40 000

30 000

20 000

10 000

0

Photon energy (keV)

Counts

Monazite (Kalimantan, Indonesia)

E 0 = 20 keV

Analyze for

Major: P, La, Ce (O by stoichiometry)

Minor: Al, Si, Ca, Th

c

0

0.0 1.0 2.0 3.0 4.0 5.0

Photon energy (keV)

Counts

6.07.0 8.09.0 10.0

40 000

30 000

20 000

10 000

kalimantan_Monazite

kalimantan_Monazite

kalimantan_Mona3-1_20kV9p95nAMED95kHz8DT_400s

Residual_Kalimantan_Mona3-1_La-Ce

. Fig. 20.12 Monazite (lanthanum-cerium phosphate mineral) at
E 0 = 20 keV; 0.1 keV to 30 keV = 48.7 million counts: a original spectrum;
b vertical expansion; c Round 1: full spectrum residuals after first

quantitative analysis; d P-region, first residuals; e La-Ce-region, first

residuals; Round 2: f P-region, second residuals; g La-Ce-region, second

residuals; Round 3; h P-region, all residuals; i La-Ce-region, all residuals

20.5 · Is the Specimen Homogeneous?