AM-2025-10005-A · Magnetiteactive
physical & structuralrev. 2
| designation | Magnetite |
|---|---|
| chemical formula | Fe₃O₄ |
| classification | Oxide / Spinel group |
| crystal system | Cubic |
| mohs hardness | 5.5 – 6.5 |
| density (g/cm³) | 5.20 |
| colour | Black, metallic to submetallic |
| type locality | Tsumeb, Otjikoto, Namibia |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 304, 539, 666
notessubmitter remarks + registry
Specimen accompanied by a single typewritten card listing the locality and the year of collection. No analytical data was supplied.
chain of custody4 events · 1 seal-break
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. |
|---|---|---|---|
| 2025-12-26 11:15 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2025-12-28 09:17 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | P.S. |
| 2026-01-10 10:49 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: ICDD card 04-2091 | P.S. |
| 2026-01-11 11:59 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 25, drawer 06 | T.J. |
physical location: vault A · shelf 25 · drawer 06 · last documented inspection: 2026-01-11 11:59 UTC