Table 2 Major elemental compositions (wt%) obtained by the XRF analysis of the samples from Mbanza Kongo (MBK), Kindoki (KDK) and Ngongo Mbata (NBC).

From: A multi-analytical characterization of fourteenth to eighteenth century pottery from the Kongo kingdom, Central Africa

Sample no.

Type

Na2O

MgO

Al2O3

SiO2

P2O5

K2O

CaO

TiO2

MnO

Fe2O3

KDK_S.12

KDK

0.18

8.40

15.90

53.20

0.58

2.50

0.37

0.82

0.03

3.98

KDK_S.13

KDK

0.14

9.81

15.60

49.70

0.98

1.69

0.16

0.61

 < 0.01

3.90

KDK_S.15

KDK

0.15

9.61

12.60

61.00

0.17

1.90

0.07

0.61

 < 0.01

1.91

MBK_S.6

A

0.78

3.71

16.70

49.90

0.08

3.44

2.47

0.84

0.08

8.50

MBK_S.11

A

0.44

1.64

16.20

50.40

1.86

3.80

1.23

0.91

0.05

7.79

KDK_S.6

A

1.40

2.98

16.90

51.60

0.04

4.44

3.06

0.78

0.06

8.79

KDK_S.8

A

0.80

2.92

17.50

49.40

0.04

3.74

3.29

0.75

0.17

8.63

NBC_S.3

A

0.37

5.16

17.10

53.90

0.24

0.14

1.57

0.65

1.25

7.57

NBC_S.4

A

1.20

4.59

15.60

48.50

0.60

0.15

6.09

0.62

0.16

12.00

NBC_S.5

A

0.78

3.22

17.40

49.50

0.78

3.73

2.07

0.84

0.10

8.44

MBK_S.9

C

1.69

2.85

16.80

46.10

1.35

1.18

4.68

1.50

0.07

10.40

MBK_S.14

C

0.13

13.90

7.12

66.90

0.29

0.43

0.31

0.19

0.01

2.12

MBK_S.17

C

0.35

0.35

18.70

60.20

0.80

2.84

0.18

0.83

n.d.

7.68

MBK_S.21

C

0.21

0.64

15.30

67.10

0.89

0.99

0.57

0.68

0.04

5.16

KDK_S.17

C

0.44

2.87

15.10

61.80

0.08

0.73

0.19

0.85

0.01

5.01

KDK_S.19

C

0.66

5.03

16.70

49.20

0.07

3.90

3.20

0.74

0.02

9.81

KDK_S.20

C

0.19

20.70

5.55

58.00

0.64

0.33

0.21

0.19

n.d.

2.13

NBC_S.11

C

0.37

0.61

16.40

61.70

1.74

0.54

0.27

0.53

0.01

2.61

NBC_S.12

C

0.20

0.70

16.30

70.10

0.43

0.41

0.17

0.54

0.01

3.22

NBC_S.14

C

0.21

0.53

14.90

62.50

1.74

0.25

0.29

0.78

0.02

3.06

MBK_S.4

D

3.01

0.44

16.80

55.80

0.20

4.10

1.42

3.35

0.20

6.36

MBK_S.15

D

1.64

2.92

16.50

51.60

0.78

1.29

4.14

1.17

0.17

10.00

MBK_S.19

D

1.14

7.55

9.63

52.80

1.00

0.86

6.09

0.73

0.21

10.30

MBK_S.22

D

2.20

0.52

15.40

62.90

0.39

2.80

2.21

0.78

0.05

5.14

MBK_S.25

D

1.99

0.98

17.70

54.70

0.75

2.78

1.65

0.90

0.19

7.53

KDK_S.1

D

2.65

0.37

17.40

54.60

0.15

4.17

1.10

2.63

0.15

6.40

KDK_S.4

D

4.28

0.47

18.20

56.70

0.17

3.34

0.90

1.94

0.13

5.20

KDK_S.5

D

4.11

0.35

18.70

55.80

0.20

3.51

0.86

1.95

0.13

5.27

NBC_S.16

D

2.86

0.43

17.40

52.60

1.34

4.79

1.10

3.09

0.17

6.17

NBC_S.17

D

2.37

0.66

16.70

54.20

1.60

2.35

2.51

1.15

0.10

6.82

NBC_S.18

D

2.96

0.59

18.10

56.50

0.53

4.17

1.40

2.86

0.18

6.22

NBC_S.20

D

4.72

0.45

18.30

51.90

1.10

2.33

1.60

2.00

0.96

6.81

NBC_S.22

D

2.42

1.35

16.90

52.80

1.36

2.40

2.28

0.86

0.08

7.43

NBC_S.23

D

1.00

3.57

17.80

44.10

1.70

0.28

4.77

1.49

0.26

12.90

NBC_S.24

D

3.93

1.16

17.30

46.40

1.85

2.19

1.73

1.52

0.06

9.99

  1. n.d. not detected.
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