AM-2021-10013-A · Calcitearchived
physical & structuralrev. 2
| designation | Calcite |
|---|---|
| chemical formula | CaCO₃ |
| classification | Carbonate / Calcite group |
| crystal system | Trigonal |
| mohs hardness | 3 |
| density (g/cm³) | 2.71 |
| colour | Milky white |
| type locality | Kimberley district, Northern Cape, South Africa |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 155, 1435, 1746
notessubmitter remarks + registry
Donated as part of a university overflow consignment; no individual provenance retained.
chain of custody6 events · 3 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. |
|---|---|---|---|
| 2021-04-15 13:55 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2021-04-19 12:02 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2021-05-03 13:26 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: ICDD card 04-6947 | S.W. |
| 2021-05-05 09:45 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 08, drawer 15 | T.J. |
| 2023-05-05 12:39 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2025-05-04 16:36 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
physical location: vault A · shelf 08 · drawer 15 · last documented inspection: 2025-05-04 16:36 UTC