|
Formula | Ca2Al4Si4O16 ∙ 9H2O |
| Optic class & sign | Biaxial negative |
| Optical orientation | |
| Optical plane | |
| Relief | |
| Refractive indices | nx =
|
|
ny =
|
|
nz =
|
|
|
| Birefringence (max.) | |
| | |
| Optic Angle
| 2Vx
|
| 2Vz
|
| Sign of elongation | |
| Interference figure | |
| Colour / pleochroism | |
| Zoning | |
|
|
Form | Habit | |
| | Surface | |
| Cleavage | |
| Twinning | |
| Extinction | |
|
|
Reaction textures | |
| Alteration / decomposition | |
|
|
Occurence | Ign | |
| | Met | |
| | Sed | |
| | Hyd | |
| | Other | |
|
|
Distinctive properties | |
| Additional comments | n-Δn chart: Anl – analcime, Cbz – chabazite, Fau – faujasite, Gis - gismondine, Gme – gmelinite, Hrm – harmotome, Php – phillipsite, Wrk - wairakite |
|
|