AM-2017-10008-A · Baritearchived
physical & structuralrev. 3
| designation | Barite |
|---|---|
| chemical formula | BaSO₄ |
| classification | Sulfate / Barite group |
| crystal system | Orthorhombic |
| mohs hardness | 3 – 3.5 |
| density (g/cm³) | 4.47 |
| colour | Greyish white |
| type locality | Anjanabonoina, Madagascar |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 453, 618, 1139
notessubmitter remarks + registry
Donated as part of a decommissioned teaching collection; no individual provenance retained.
chain of custody8 events · 6 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. |
|---|---|---|---|
| 2017-11-08 15:42 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | H.D. |
| 2017-11-13 16:14 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2017-11-24 08:37 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: COD entry 122517 | T.J. |
| 2017-11-25 10:50 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 04, drawer 33 | H.D. |
| 2019-11-25 08:30 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2021-11-24 16:16 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2023-11-24 16:58 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2025-11-23 10:57 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault D · shelf 04 · drawer 33 · last documented inspection: 2025-11-23 10:57 UTC