AM-2024-10001-A · Gypsumarchived
physical & structuralrev. 3
| designation | Gypsum |
|---|---|
| chemical formula | CaSO₄·2H₂O |
| classification | Sulfate |
| crystal system | Monoclinic |
| mohs hardness | 1.5 – 2 |
| density (g/cm³) | 2.35 |
| colour | Milky white |
| type locality | Inder, Atyrau, Kazakhstan |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 416, 491, 620, 670, 1006, 1138
notessubmitter remarks + registry
Specimen accompanied by a single typewritten card listing the locality and the year of collection. No further provenance information.
chain of custody5 events · 2 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. |
|---|---|---|---|
| 2024-05-21 13:27 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2024-05-26 14:55 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2024-05-31 09:39 UTC | pass B | Raman acquisition; 6 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: RRUFF R05008 | T.J. |
| 2024-06-02 12:41 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 02, drawer 28 | N.P. |
| 2026-06-02 11:24 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault D · shelf 02 · drawer 28 · last documented inspection: 2026-06-02 11:24 UTC