AM-2020-10018-A · Marcasiteactive
physical & structuralrev. 4
| designation | Marcasite |
|---|---|
| chemical formula | FeS₂ |
| classification | Sulfide / Marcasite group |
| crystal system | Orthorhombic |
| mohs hardness | 6 – 6.5 |
| density (g/cm³) | 4.87 |
| colour | Weakly zoned, pale brass yellow with greenish cast |
| type locality | Andriamena, Betsiboka, Madagascar |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 322, 388
notessubmitter remarks + registry
Macroscopic appearance consistent with marcasite; no surface alteration observed at the time of intake.
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. |
|---|---|---|---|
| 2020-09-25 14:22 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2020-09-28 11:17 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2020-10-05 08:15 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: COD entry 196429 | S.W. |
| 2020-10-08 10:53 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 27, drawer 34 | T.J. |
| 2022-10-08 12:07 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
| 2024-10-07 14:20 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
physical location: vault D · shelf 27 · drawer 34 · last documented inspection: 2024-10-07 14:20 UTC