1. Chlorite

2. Trioctahedral Layer

3. T-O-T-O Chlorite Trioctahedral: = Talc + Brucite
Chlorite (Mg,Al)3(OH)6Mg3(Al,Si)4O10(OH)2
= Talc + Brucite
Al substitution in Tetrahedral layer gives the talc layer a negative charge and Al, Fe, Cr etc. in the brucite layer gives it a net positive charge.

4. Trioctahedral Chlorite
Clinochlore (Mg5Al)(AlSi3)O10(OH)8
Chamosite (Fe5Al)(AlSi3)O10(OH)8
Pennantite (Mn5Al)(AlSi3)O10(OH)8
Dioctahedral
Very few known

5. Chlorite Occurrences

6. Chlorite Occurrences

7. Chlorite Occurrences Altered mafic igneous Rocks (Ocean Crust)
High Mg content

8. Chlorite Polytypes