| Label | Sample |
| Mou | Mouyondzi clay (raw) |
| Mou6 | Mou heated to 600˚C |
| Mou7 | Mou heated to 700˚C |
| Mou8 | Mou heated to 800˚C |
| GMou6 | Geopolymer based on Mou6 |
| GMou7 | Geopolymer based on Mou7 |
| GMou8 | Geopolymer based on Mou8 |