AM-2018-10002-A · Magnetitearchived
physical & structuralrev. 4
| 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, 538, 668
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 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. |
|---|---|---|---|
| 2018-09-11 16:56 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | H.D. |
| 2018-09-12 08:17 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | V.O. |
| 2018-09-14 15:02 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: RRUFF R05002 | V.O. |
| 2018-09-15 08:54 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 25, drawer 32 | H.D. |
| 2020-09-14 09:14 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2022-09-14 10:41 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2024-09-13 13:21 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault A · shelf 25 · drawer 32 · last documented inspection: 2024-09-13 13:21 UTC