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Heritage Science

Table 2 The chemical composition of weathered and unweathered sandstones

From: Determination on the thickness of superficially weathered layer of historical stones from Guanzhong area in China

 

Weathered (wt%)

Unweathered (wt%)

SiO2

63.21

65.88

Al2O3

14.02

13.89

MgO

4.74

2.68

K2O

4.23

2.61

Na2O

3.86

2.39

Fe2O3

3.54

3.94

CaO

3.29

5.27

TiO2

0.63

0.65

P2O5

0.16

0.16

BaO

0.13

0.12

Total

97.81

97.59

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