Questionable
NOTES: Crystals small and bladed. Looks homogeneous on BSE and X-ray maps, and seems to be a single phase. Material looks more like grunerite than riebeckite. Requires more checking.
 |  |
| Position | 96 |
| Mineral | Riebeckite? |
| Sample Name | Rieb |
| Type | Amphibole |
| Nominal formula | [ ]Na2(Fe2+3Fe3+2)Si8O22(OH)2 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Liberty Bell Mtn., Okanogan Co, WA |
| Original reported analysis | – |
| Composition quality | Questionable |
| Comments | Analysis shown is based on EDS and loose stoichiometric constraints. This stuff looks more like a grunerite than riebeckite. |
| H O Na Mg Al Si Ca Mn Fe | 0.2 39.03 0.96 0.11 0.47 22.1 1.29 1.19 34.64 |
