AM-2016-10005-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 | Ratnapura, Sabaragamuwa, Sri Lanka |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 303, 537, 668
notessubmitter remarks + registry
Submitter cited the type locality. Specimen retained for reference; no chain-of-custody documentation available beyond the submission packet.
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. |
|---|---|---|---|
| 2016-12-20 12:07 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2016-12-25 09:51 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | N.P. |
| 2017-01-09 11:27 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: AMCSD #4649 | N.P. |
| 2017-01-11 10:49 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 24, drawer 29 | N.P. |
| 2019-01-11 16:56 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2021-01-10 13:07 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2023-01-10 10:20 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2025-01-09 13:43 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault C · shelf 24 · drawer 29 · last documented inspection: 2025-01-09 13:43 UTC