Mineral description : Eudialyte
Eudialyte from Norra Kärr.
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| Mineral class | Silicates : Nesosilicate : Zircon - titanite group. |
| Chemical formula | Na3(Ca,Fe)3Zr(OH,Cl/Si3O9)2 |
| Crystal system | Trigonal/hexagonal |
| Habitus | Crystals are tabular, rombohedral or prismatic, but often as rounded grains. |
| Cleavage | Indistinct, fracture uneven. |
| Hardness | 5-5.5 |
| Density | 2.74-2.98 |
| Color | Often red but also exists in yellowish brown to red or pink hues. |
| Streak | White |
| Luster | Vitreous to dull lustre. |
| Description | |
| Occurance | In nefeline syenites. |
| Associates | Arfvedsonite, nefeline, aegirine, katapleite. |
| Notes | Easily dissolved in acids. |
| Locations | A rare mineral in Sweden, but with one good locality.
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| To silicate index. |
Mineral group index. |
Main index. |
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Last changed : 1998-03-07