AM-2020-10002-A · Marcasitearchived
physical & structuralrev. 1
| designation | Marcasite |
|---|---|
| chemical formula | FeS₂ |
| classification | Sulfide / Marcasite group |
| crystal system | Orthorhombic |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 4.90 |
| colour | Tarnishing dull |
| type locality | Bahia, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 323, 386
notessubmitter remarks + registry
Marcasite of ordinary appearance and habit. Used as a calibration reference during the analytical pass.
chain of custody7 events · 4 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. |
|---|---|---|---|
| 2020-03-27 11:34 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | C.B. |
| 2020-03-30 10:07 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | N.P. |
| 2020-04-08 13:30 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: ICDD card 04-2962 | N.P. |
| 2020-04-11 11:22 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 08, drawer 14 | C.B. |
| 2022-04-11 15:21 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2024-04-10 08:55 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2026-04-10 13:31 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault B · shelf 08 · drawer 14 · last documented inspection: 2026-04-10 13:31 UTC