AM-2022-10009-A · Marcasitearchived
physical & structuralrev. 3
| designation | Marcasite |
|---|---|
| chemical formula | FeS₂ |
| classification | Sulfide / Marcasite group |
| crystal system | Orthorhombic |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 4.85 |
| colour | Tarnishing dull |
| type locality | Tsumeb, Otjikoto, Namibia |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 323, 386
notessubmitter remarks + registry
Donated as part of a university overflow consignment; no individual provenance retained.
chain of custody6 events · 3 seal-breaks
Events recorded against this accession in the registry's printed custody book. Operator initials are anonymous. Storage codes follow the convention vault-shelf-drawer.
| timestamp | stage | detail | op. |
|---|---|---|---|
| 2022-04-03 16:01 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | P.S. |
| 2022-04-08 09:00 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | R.E. |
| 2022-04-14 14:58 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: AMCSD #1924 | R.E. |
| 2022-04-15 15:59 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 26, drawer 09 | P.S. |
| 2024-04-14 12:25 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2026-04-14 12:42 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
physical location: vault A · shelf 26 · drawer 09 · last documented inspection: 2026-04-14 12:42 UTC