Samples |
SiO2 |
Al2O3 |
Fe2O3 |
CaO |
MgO |
K2O |
SO3 |
P2O5 |
Anak Krakatau |
62.96c
|
22.25a
|
4.34a
|
5.82a
|
3.02a
|
0.68c
|
0.83a
|
0.64a
|
Panjang |
65.50bc
|
20.55ab
|
3.94a
|
4.81a
|
2.51a
|
1.10bc
|
0.17b
|
0.64a
|
Rakata |
73.47a
|
18.14b
|
2.16b
|
2.15b
|
1.42b
|
1.54a
|
0.03b
|
0.55b
|
Sebesi |
66.92b
|
22.64a
|
3.64a
|
1.73b
|
1.69b
|
1.32ab
|
0.08b
|
0.55b
|
Minimum |
52.66 |
16.37 |
0.01 |
0.00 |
0.44 |
0.63 |
0.00 |
0.43 |
Maximum |
75.50 |
31.42 |
9.75 |
6.69 |
4.99 |
2.00 |
3.72 |
0.77 |
Mean |
67.18 |
21.33 |
3.55 |
2.92 |
1.94 |
1.24 |
0.23 |
0.58 |
Std. deviation |
5.62 |
3.70 |
1.63 |
1.82 |
0.99 |
0.39 |
0.55 |
0.09 |