AM-2017-10007-A · Magnetitearchived
physical & structuralrev. 1
| designation | Magnetite |
|---|---|
| chemical formula | Fe₃O₄ |
| classification | Oxide / Spinel group |
| crystal system | Cubic |
| mohs hardness | 5.5 – 6.5 |
| density (g/cm³) | 5.14 |
| colour | Slightly tarnished, black, metallic to submetallic |
| type locality | Yaogangxian mine, Hunan, China |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 303, 539, 667
notessubmitter remarks + registry
Magnetite of ordinary appearance and habit. Retained for completeness of the locality record.
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. |
|---|---|---|---|
| 2017-09-17 13:08 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | V.O. |
| 2017-09-20 13:47 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2017-09-27 10:41 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: COD entry 187016 | T.J. |
| 2017-09-29 14:49 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 12, drawer 05 | V.O. |
| 2019-09-29 13:06 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2021-09-28 09:38 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2023-09-28 11:06 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2025-09-27 15:50 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
physical location: vault A · shelf 12 · drawer 05 · last documented inspection: 2025-09-27 15:50 UTC