Sample no. 4

Mineral

Relative %

Card number

1

Quartz SiO₂

36.6

(5 - 0490)

2

Microcline KAlSi₃O₈

35.4

(01 - 0705)

3

Albite Na(Al Si₃O₈)

23.3

(02 - 0739)

4

Illite KAl₂(Si₃AlO₁₀)(OH)₂

4.7

(25 - 0001)