AM-2017-10005-A · Aragonitearchived
physical & structuralrev. 2
| designation | Aragonite |
|---|---|
| chemical formula | CaCO₃ |
| classification | Carbonate / Aragonite group |
| crystal system | Orthorhombic |
| mohs hardness | 3.5 – 4 |
| density (g/cm³) | 2.94 |
| colour | Colourless to pale brown |
| type locality | Tsumeb, Otjikoto, Namibia |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 153, 208, 704, 1575
notessubmitter remarks + registry
Photographic record retained. Specimen temperature held at lab ambient throughout intake.
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. |
|---|---|---|---|
| 2017-10-09 09:43 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2017-10-11 14:40 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2017-10-17 16:53 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: COD entry 146373 | T.J. |
| 2017-10-18 16:46 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 21, drawer 15 | R.E. |
| 2019-10-18 08:53 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2021-10-17 11:32 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2023-10-17 12:53 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2025-10-16 08:09 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
physical location: vault C · shelf 21 · drawer 15 · last documented inspection: 2025-10-16 08:09 UTC