AM-2018-10012-A · Cassiteritearchived
physical & structuralrev. 2
| designation | Cassiterite |
|---|---|
| chemical formula | SnO₂ |
| classification | Oxide / Rutile group |
| crystal system | Tetragonal |
| mohs hardness | 6 – 7 |
| density (g/cm³) | 6.99 |
| colour | Sherry-brown on edges |
| type locality | Mont Saint-Hilaire, Quebec, Canada |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 476, 631, 775
notessubmitter remarks + registry
Crystals up to 7 mm on edge, in random orientation. On quartz matrix.
chain of custody7 events · 4 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. |
|---|---|---|---|
| 2018-08-28 14:34 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2018-08-31 08:24 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | R.E. |
| 2018-09-05 12:31 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: AMCSD #1089 | R.E. |
| 2018-09-06 15:05 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 27, drawer 27 | N.P. |
| 2020-09-05 16:04 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2022-09-05 10:01 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2024-09-04 09:58 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
physical location: vault C · shelf 27 · drawer 27 · last documented inspection: 2024-09-04 09:58 UTC