AM-2022-10001-C · Magnetite, anomaly under reviewactive
physical & structuralrev. 4
| designation | Magnetite, anomaly under review |
|---|---|
| chemical formula | Fe₃O₄ |
| classification | Oxide / Spinel group |
| crystal system | Cubic |
| mohs hardness | 5.5 – 6.5 |
| density (g/cm³) | 5.19 |
| colour | Steel grey, octahedral habit |
| type locality | Dundas, Tasmania, Australia |
raman spectroscopy532 nm · pass C
reported peaks (cm⁻¹): 302, 537, 666
notessubmitter remarks + registry
Specimen has been subject to four independent analytical passes. Two report ordinary magnetite within experimental tolerance; two report results consistent with neither magnetite nor any related ferrimagnet. The discrepancy reproduces on intercomparison of the same instrument with the same operator on different days. The record is held open.
chain of custody6 events · 2 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. |
|---|---|---|---|
| 2022-11-13 10:24 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2022-11-17 09:02 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2022-11-29 08:22 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: RRUFF R05006 | T.J. |
| 2023-01-09 14:51 UTC | pass C | x-ray diffraction; powder mount; phase identification against the reference library instrument: PANalytical X'Pert PRO (Cu Kα) ref. checked: AMCSD #7503 | T.J. |
| 2023-01-11 08:55 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 28, drawer 28 | T.J. |
| 2025-01-10 12:02 UTC | re-inspection | seal intact · label legible · no visible degradation | R.E. |
physical location: vault A · shelf 28 · drawer 28 · last documented inspection: 2025-01-10 12:02 UTC