Interstratified mineral, Interstratified clay mineral, Mixed layer mineral

Materials composed of cross-bedded 2 or 3 layer unit structures of layered minerals such as phyllosilicates. Dioctahedral type interstratified minerals are composed of dioctahedral unit layers, and trioctahedral type interstratifed minerals are composed of trioctahedral unit layers. Regularly interstratified minerals are composed of unit layers piled up reguraly with a constant sequences, and randomly interstratified minerals are composed of unit layers piled up with a random sequences. Randomly interstratified minerals are not considered as valid mineral species. As combinations of unit layers and combination ratio strongly depends on formation conditions, interstratified minerals are used for research on the distribution of metazomatic rocks.

Year of discovery: 1954 (Japan)

Locality list: 46 localities of interstratified mineral

- Class: Phyllosilicate subclass < Silicate class

- Dioctahedral type
- Dioctahedral mica / Dioctahedral smectite
- 1:1regular: Rectorite
- Random: Celadonite/Montmorillonite
- Random: Glauconite/Smectite
- Random: Sericite/Montmorillonite
- Random: Sericite/Smectite
- Random: Mica/Montmorillonite
- Random: Mica/Smectite
- Dioctahedral chlorite / Dioctahedral smectite
- 1:1regular: Tosudite
- Random: Sudoite/Montmorillonite
- Random: Chlorite/Montmorillonite
- Random: Chlorite/Smectite
- Dioctahedral mica / Dioctahedral chlorite
- Random: Sericite/Chlorite
- Random: Sericite/Sudoite
- Dioctahedral mica / Dioctahedral chlorite / Dioctahedral smectite
- Kaoline / Montmorillonite
- Random: Halloysite/Montmorillonite
- Random: Kaolin/Montmorillonite
- Random: Kaolinite/Smectite
- Random: Kaolin/Smectite
- Kaoline / Dioctahedral mica
- Random: Kaolinite/Sericite

- Trioctahedral type
- Trioctahedral mica / Trioctahedral vermiculite
- 1:1regular: Hydrobiotite
- Random: Phlogopite/Vermiculite
- Random: Illite/Vermiculite
- Random: Mica/Vermiculite
- Trioctahedral smectite / Trioctahedral vermiculite
- Random: Montmorillonite/Vermiculite
- Random: Saponite/Vermiculite
- Trioctahedral mica / Trioctahedral smectite
- Random: Illite/Montmorillonite
- Random: Illite/Smectite
- Random: Mica/Montmorillonite
- Random: Mica/Smectite
- Trioctahedral mica / Trioctahedral mica
- Random: Muscovite/Paragonite
- Random: Illite/Sericite
- Random: Mica/Hydromica
- Trioctahedral chlorite / Trioctahedral vermiculite
- 1:1regular: Corrensite
- Random: Chlorite/Vermiculite
- Trioctahedral chlorite / Trioctahedral smectite
- 1:1 regular: Corrensite
- Random: Chlorite/Saponite
- Random: Clinochlore/Saponite
- Random: Clinochlore/Montmorillonite
- Random: Chlorite/Smectite
- Trioctahedral chlorite / Trioctahedral serpentine
- 1:1-2:1 regular: Dozyite
- Trioctahedral mica / Trioctahedral chlorite
- Random: Mica/Al-chlorite
- Talc / Trioctahedral chlorite
- 1:1regular: Kulkeite
- Random: Talc/Chlorite
- Talc / Trioctahedral smectite
- 1:1regular: Aliettite