AM-2017-10024-A · Sideritearchived
physical & structuralrev. 2
| designation | Siderite |
|---|---|
| chemical formula | FeCO₃ |
| classification | Carbonate / Calcite group |
| crystal system | Trigonal |
| mohs hardness | 3.5 – 4.5 |
| density (g/cm³) | 3.95 |
| colour | Slightly tarnished, pale yellow-brown |
| type locality | Anjanabonoina, Madagascar |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 185, 283, 733, 1087
notessubmitter remarks + registry
Specimen accompanied by a single typewritten card listing the locality and the year of collection. Original collection number illegible due to ink fade.
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. |
|---|---|---|---|
| 2017-12-17 16:08 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | V.O. |
| 2017-12-18 09:04 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2017-12-28 13:10 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: COD entry 176133 | L.K. |
| 2017-12-31 16:11 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 03, drawer 03 | V.O. |
| 2019-12-31 13:22 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2021-12-30 14:21 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2023-12-30 12:14 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2025-12-29 09:39 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
physical location: vault D · shelf 03 · drawer 03 · last documented inspection: 2025-12-29 09:39 UTC