AM-2018-10005-A · Magnetitearchived
physical & structuralrev. 3
| designation | Magnetite |
|---|---|
| chemical formula | Fe₃O₄ |
| classification | Oxide / Spinel group |
| crystal system | Cubic |
| mohs hardness | 5.5 – 6.5 |
| density (g/cm³) | 5.11 |
| colour | Steel grey, octahedral habit |
| type locality | Freiberg district, Saxony, Germany |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 303, 538, 670
notessubmitter remarks + registry
Magnetite of ordinary appearance and habit. Used as a calibration reference during the analytical pass.
chain of custody8 events · 6 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. |
|---|---|---|---|
| 2018-02-12 10:06 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | S.W. |
| 2018-02-15 11:29 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | M.A. |
| 2018-02-22 08:40 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: COD entry 132017 | M.A. |
| 2018-02-23 15:03 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 17, drawer 16 | S.W. |
| 2020-02-23 16:44 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2022-02-22 11:35 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2024-02-22 13:36 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2026-02-21 14:07 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
physical location: vault B · shelf 17 · drawer 16 · last documented inspection: 2026-02-21 14:07 UTC