AM-2010-10001-B · Pyrite, anomaly under reviewunverified
The classification below is preliminary. Spectroscopic confirmation is incomplete; values shown reflect the most recent analytical pass and may be revised without notice.
physical & structuralrev. 5
| designation | Pyrite, anomaly under review |
|---|---|
| chemical formula | FeS₂ |
| classification | Sulfide / Pyrite group |
| crystal system | Cubic |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 5.07 |
| colour | Iridescent on weathered surface |
| type locality | Joplin district, Missouri, USA |
raman spectroscopy532 nm · pass B
reported peaks (cm⁻¹): 342, 379, 430
notessubmitter remarks + registry
Specimen retained for repeat magnetometric examination. Magnetic moment, measured at 4 K, exceeds the value predicted for the reported iron content by approximately one order of magnitude. The discrepancy is reproducible across two re-mounts. No structural distortion is detectable by powder XRD.