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Heritage Science

Table 3 Chemical analysis of the major elements (values in wt%)

From: Black earths from Veneto and Piedmont (Northern Italy): origin, composition and potential use in different painting techniques

ID

SiO 2

TiO 2

Al 2 O 3

Fe 2 O 3

MnO

MgO

CaO

K 2 O

Na 2 O

P 2 O 5

LOI

Bol1*

25.07

1.55

7.84

5.16

0.05

1.81

13.20

0.28

0.05

0.37

44.63

Bol1b

20.72

1.67

7.60

7.90

0.09

1.72

20.71

0.18

0.05

0.38

38.97

Bol1a

20.33

1.62

7.44

7.64

0.10

1.71

20.56

0.17

0.06

0.38

39.98

Bol1c

19.35

1.58

7.13

7.94

0.17

1.74

24.07

0.17

0.06

0.38

37.40

Bol1d

18.56

1.47

6.79

7.72

0.19

1.75

25.18

0.15

0.06

0.36

37.76

Bol1e

20.63

1.62

7.54

7.45

0.09

1.69

19.19

0.16

0.05

0.38

41.19

TN01*

26.61

2.13

8.83

8.07

0.10

2.00

18.34

0.13

0.05

0.37

33.36

TN-VF

57.90

0.58

15.14

7.40

0.07

2.23

0.43

3.32

0.25

0.03

12.65

Boc2

79.83

0.64

8.82

0.55

0.03

0.13

0.51

0.27

0.05

0.00

9.18

TN01A*

26.01

2.05

8.95

9.19

0.15

2.13

18.48

0.20

0.06

0.40

32.38

TN-K

58.58

0.76

5,43

3.65

0.02

0.45

0.19

1.42

0.13

0.16

29.21

TO-K

40.42

1.08

12.44

16.80

4.69

2.86

7.79

0.63

0.33

0.30

12.66

TR-D

25.50

0.65

7.88

13.55

2.13

2.02

23.95

0.46

0.47

0.27

23.12

  1. * Data from [4].
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