AM-2012-10001-B · Hematite, anomaly under reviewunverified
The classification below is preliminary. Spectroscopic confirmation is incomplete; values shown reflect the most recent analytical pass and may be revised without notice.
physical & structuralrev. 2
| designation | Hematite, anomaly under review |
|---|---|
| chemical formula | Fe₂O₃ |
| classification | Oxide / Hematite group |
| crystal system | Trigonal |
| mohs hardness | 5 – 6 |
| density (g/cm³) | 5.23 |
| colour | Tabular, specular |
| type locality | Ratnapura, Sabaragamuwa, Sri Lanka |
raman spectroscopy532 nm · pass B
reported peaks (cm⁻¹): 223, 293, 410, 612, 1319
notessubmitter remarks + registry
Polarised micro-Raman maps over a 200 µm × 200 µm area show that the 612 cm⁻¹ feature varies in intensity in a coherent spatial pattern with an apparent characteristic length of approximately 22 µm. The pattern reproduces on rotation of the specimen. No textural correlate is visible by SEM. The 612 cm⁻¹ wavenumber matches the unattributed band reported elsewhere in the registry.
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. |
|---|---|---|---|
| 2012-06-25 16:50 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | L.K. |
| 2012-06-27 12:36 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2012-07-07 15:03 UTC | pass B | Raman acquisition; 5 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: COD entry 137007 | L.K. |
| 2012-07-09 15:41 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 24, drawer 09 | L.K. |
| 2014-07-09 08:40 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2016-07-08 11:35 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2018-07-08 09:17 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2020-07-07 14:54 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
physical location: vault D · shelf 24 · drawer 09 · last documented inspection: 2020-07-07 14:54 UTC