Composition

high K₂O

PbO-BaO

F value

p value

F value

p value

SiO₂

31.3509

4e−05^***

19.3865

6.1e−05^***

Na₂O

0.0324

0.8595

6.9239

0.0115^*

K₂O

2.3449

0.1452

5.3306

0.0254^*

CaO

0.6230

0.4415

4.9538

0.0309^*

Al₂O₃

3.3550

0.0857^#

9.0118

0.0043^**

CuO

4.8978

0.0418^*

0.4645

0.4989

PbO

2.1582

0.1612

6.1300

0.0169^*

P₂O₅

0.0026

0.9602

12.7208

0.0008^***

SrO

0.2808

0.6034

2.9280

0.0936^#