AM-2011-02244-C · 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) | 5.17 |
| colour | Black, metallic to submetallic |
| type locality | Kiruna, Norrbotten, Sweden |
raman spectroscopy532 nm · pass C
reported peaks (cm⁻¹): 304, 538, 668
notessubmitter remarks + registry
Strongly magnetic. Octahedral crystal habit observed.
chain of custody9 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. |
|---|---|---|---|
| 2011-04-30 13:13 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2011-05-01 08:13 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | C.B. |
| 2011-05-15 08:45 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: RRUFF R05008 | C.B. |
| 2011-07-07 16:20 UTC | pass C | x-ray diffraction; powder mount; phase identification against the reference library instrument: Bruker D2 PHASER (Cu Kα) ref. checked: RRUFF R05001 | C.B. |
| 2011-07-09 11:51 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 13, drawer 30 | T.J. |
| 2013-07-08 12:42 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2015-07-08 15:51 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2017-07-07 15:12 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2019-07-07 16:37 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault D · shelf 13 · drawer 30 · last documented inspection: 2019-07-07 16:37 UTC