Picture pending, hjelmite from Stripåsen.
| Mineral class | Oxides : Perovskit pyrochlor columbite group |
| Chemical formula | 3(UO2,Mn,Ca)O·(Y,Ce)2·O3·3(Ta,Nb)2O5·2H2O |
| Crystal system | |
| Habitus | Incomplete short prismatic crystals or rounded aggregates. |
| Cleavage | |
| Hardness | 5 |
| Density | 5.82 |
| Color | Black but often with rust brown coating. |
| Streak | Dark gray. |
| Luster | Metallic. |
| Description | |
| Occurance | |
| Associates | |
| Notes | Hjelmite is probably a mixture of tapiolite and pyrochlore. |
| Locations | A rare mineral
|
| To oxides index. |
Mineral group index. |
Main index. |
If you have some questions, suggestions or comments you are welcome to write me a line or two.