AM-2011-10003-A · Magnetitearchived
physical & structuralrev. 2
| designation | Magnetite |
|---|---|
| chemical formula | Fe₃O₄ |
| classification | Oxide / Spinel group |
| crystal system | Cubic |
| mohs hardness | 5.5 – 6.5 |
| density (g/cm³) | 5.11 |
| colour | Black, metallic to submetallic |
| type locality | Yaogangxian mine, Hunan, China |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 305, 537, 666
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. |
|---|---|---|---|
| 2011-09-22 09:30 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2011-09-27 12:35 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2011-10-10 16:30 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #9922 | T.J. |
| 2011-10-12 15:14 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 01, drawer 24 | T.J. |
| 2013-10-11 10:40 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2015-10-11 15:13 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2017-10-10 13:18 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2019-10-10 12:48 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
physical location: vault A · shelf 01 · drawer 24 · last documented inspection: 2019-10-10 12:48 UTC
errata · corrections of record1 entry
The following corrections have been issued for this record since accession. Original values are retained here for citation purposes; the canonical metadata above reflects the most recent correction.
| id | issued | field | was | now |
|---|---|---|---|---|
| ERR-2013-0001 | 2013-08-26 | formula | Cu2(CO3)(OH)2 | Cu₂(CO₃)(OH)₂ |