Secondary standard
NOTES: Homogeneous, but stay away from cracks, holes, and inclusions.
 |  |
| Position | 87 |
| Mineral | Magnetite |
| Sample Name | Mag |
| Type | Oxide |
| Nominal formula | Fe3O4 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Little Chief Canyon, Snohomish Co., WA |
| Original reported analysis | Calculated from ideal formula |
| Composition quality | Secondary standard |
| Comments | Analysis shown is based on EDS and stoichiometric constraints. Close to end member. |
| O Mg Al Ti Mn Fe | 27.74 0.1 0.13 0.58 0.1 71.36 |
