AM-2018-10019-A · Hematitearchived
physical & structuralrev. 4
| designation | Hematite |
|---|---|
| chemical formula | Fe₂O₃ |
| classification | Oxide / Hematite group |
| crystal system | Trigonal |
| mohs hardness | 5 – 6 |
| density (g/cm³) | 5.22 |
| colour | Tabular, specular |
| type locality | Ouro Preto, Minas Gerais, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 226, 247, 290, 411, 498, 611
notessubmitter remarks + registry
Photographic record retained. Routine intake; no anomalies noted. Re-pass note (2026-05-17). Re-pass on 2026-05-17 confirms archival condition; matrix re-described as a thin botryoidal crust on quartzite.
chain of custody7 events · 4 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. |
|---|---|---|---|
| 2018-08-13 10:18 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | H.D. |
| 2018-08-15 15:23 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2018-08-20 10:56 UTC | pass B | Raman acquisition; 6 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: RRUFF R05004 | L.K. |
| 2018-08-21 16:41 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 24, drawer 05 | H.D. |
| 2020-08-20 15:44 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2022-08-20 14:41 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2024-08-19 09:29 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
physical location: vault B · shelf 24 · drawer 05 · last documented inspection: 2024-08-19 09:29 UTC
errata · corrections of record1 entry
The following corrections have been issued for this record since accession. Original values are retained here for citation purposes; the canonical metadata above reflects the most recent correction.
| id | issued | field | was | now |
|---|---|---|---|---|
| ERR-2014-0002 | 2014-10-26 | density | 3.5 | 3.49–3.55 |