Chemical composition (%P)

Raw diatomite

Boudinar

(preliminary study El Attmani, 2015 )

Rif crude diatomite (Zaitan et al., 2006)

Raw diatomite Ras Tarf (Rif, Morocco) Haddad and al., 2001

Raw diatomite Algeria

Benzelmat et al, 2019

Raw diatomite Sig Algeria (Khaldi-2019; Cherrak, 2018)

SiO₂

57.1

72.8

69.00

47.52

68.015

Al₂O₃

9.63

5.22

4.37

2.85

7.575

CaCO

6.15

5.86

5.30

22.44

19.25

MgO

2.28

1.13

1.08

1.21

1.241

Fe₂O₃

5.13

1.94

2.58

1.22

2.024

Na₂O

2

0.83

0.67

0.09

0.200

K₂O

0.898

0.901

1.80

---

1.491

TiO₂

0.263

0.27

---

----

0.144

ZrO₂

0.0109

----

---

---

0.007

SrO₃

0.0164

-----

0.10

---

0.038