AM-2017-10009-A · Marcasitearchived
physical & structuralrev. 2
| designation | Marcasite |
|---|---|
| chemical formula | FeS₂ |
| classification | Sulfide / Marcasite group |
| crystal system | Orthorhombic |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 4.88 |
| colour | Pale brass yellow with greenish cast |
| type locality | Schwarzwald, Baden-Württemberg, Germany |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 322, 386
notessubmitter remarks + registry
Crystals up to 25 mm on edge, in random orientation. No accompanying matrix. Re-pass note (2026-06-14). Re-pass on 2026-06-14 reproduces previous measurements within experimental uncertainty; minor surface oxidation noted along one cleavage face, consistent with archival storage.
chain of custody8 events · 5 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. |
|---|---|---|---|
| 2017-04-25 16:41 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | M.A. |
| 2017-04-30 14:37 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2017-05-03 15:49 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: ICDD card 04-3534 | L.K. |
| 2017-05-06 13:24 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 15, drawer 08 | M.A. |
| 2019-05-06 10:15 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2021-05-05 10:55 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2023-05-05 09:05 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2025-05-04 11:08 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
physical location: vault C · shelf 15 · drawer 08 · last documented inspection: 2025-05-04 11:08 UTC