AM-2010-10010-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) | 5.17 |
| colour | Black, metallic to submetallic |
| type locality | Bancroft, Ontario, Canada |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 305, 538, 669
notessubmitter remarks + registry
Crystals up to 7 mm on edge, partly etched. Specimen mounted on a fragment of host rock.
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. |
|---|---|---|---|
| 2010-02-09 08:22 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2010-02-11 08:14 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | P.S. |
| 2010-02-25 11:00 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: COD entry 167665 | P.S. |
| 2010-02-26 15:09 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 22, drawer 15 | N.P. |
| 2012-02-26 14:11 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
| 2014-02-25 11:44 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
| 2016-02-25 11:59 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
| 2018-02-24 09:41 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
physical location: vault D · shelf 22 · drawer 15 · last documented inspection: 2018-02-24 09:41 UTC