Minerals

Chemical formula

Some lines observed on diffractogram (Å)

Corresponding d_hkl on A.S.T.M. files

Kaolinite

Si₂O₅Al₂(OH)₄

7.15; 3.57; 1.54

7.17; 3.57; 1.545

Illite

K [(Si₃Al)O₁₀Al₂(OH)₂]

9.95; 4.97; 1.99

10.00; 5.02; 2.005

Quartz

SiO₂

4.25; 3.34; 1.81

4.26; 3.34; 1.817

Feldspath

[(K, Na) ou (Ca, Na)] Si₃AlO₈

3.88; 3.31; 3.20

3.83; 3.31; 3.21

Maghémite

Fe₂O₃

3.88; 2.57; 2.23

3.86; 2.52; 2.234

Anatase

TiO₂

2.38; 1.50

2.379; 1.494

Ilménite

FeTiO₃

3.74

3.734

Zircon

ZrSiO₄

1.99

2.06