AM-2013-10022-A · Gypsumarchived
physical & structuralrev. 2
| designation | Gypsum |
|---|---|
| chemical formula | CaSO₄·2H₂O |
| classification | Sulfate |
| crystal system | Monoclinic |
| mohs hardness | 1.5 – 2 |
| density (g/cm³) | 2.34 |
| colour | Pale honey, selenite habit |
| type locality | Outokumpu, North Karelia, Finland |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 491, 619, 672
notessubmitter remarks + registry
Standard gypsum reference specimen. Supplied as a single piece on a small fragment of host matrix.
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. |
|---|---|---|---|
| 2013-04-12 10:02 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | M.A. |
| 2013-04-17 16:44 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | P.S. |
| 2013-04-19 15:03 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: ICDD card 04-3671 | P.S. |
| 2013-04-21 16:13 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 26, drawer 01 | M.A. |
| 2015-04-21 09:14 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2017-04-20 16:57 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2019-04-20 13:41 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2021-04-19 14:05 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault B · shelf 26 · drawer 01 · last documented inspection: 2021-04-19 14:05 UTC