AM-2026-00012-A · Orpiment (As₂S₃)archived
physical & structuralrev. 1
| designation | Orpiment (As₂S₃) |
|---|---|
| chemical formula | As₂S₃ |
| classification | Sulfide |
| crystal system | Monoclinic |
| mohs hardness | 1.5 – 2 |
| density (g/cm³) | 3.49 |
| colour | Lemon-yellow |
| type locality | Chuquicamata, Antofagasta, Chile |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 203, 355, 384
notessubmitter remarks + registry
Foliated aggregate of lemon-yellow colouration with pearly lustre on cleavage surfaces. Submitted as part of a small consignment of Chuquicamata material; locality recorded to mine level only. Specimen stored in dark conditions to limit photodegradation.
chain of custody4 events · 1 seal-break
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. |
|---|---|---|---|
| 2026-07-29 09:45 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | C.B. |
| 2026-07-31 15:19 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2026-08-03 12:03 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: RRUFF R05003 | L.K. |
| 2026-08-04 10:35 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 12, drawer 23 | C.B. |
physical location: vault B · shelf 12 · drawer 23 · last documented inspection: 2026-08-04 10:35 UTC