Secondary standard
NOTES: Homogeneous. Because of the highly stoichiometric nature of pyrite, the analysis is probably very good.
 |  |
| Position | 8 |
| Mineral | Pyrite |
| Sample Name | Py |
| Type | Sulfide |
| Nominal formula | FeS2 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Spruce Claim, North Bend, King County, WA |
| Original reported analysis | Calculated from ideal formula |
| Composition quality | Secondary standard |
| Comments | Fire assay of this material indicates it is precious metal free. |
| S Fe Zn | 53.36 45.5 1.13 |
