AM-2016-10009-A · Cassiteritearchived
physical & structuralrev. 4
| designation | Cassiterite |
|---|---|
| chemical formula | SnO₂ |
| classification | Oxide / Rutile group |
| crystal system | Tetragonal |
| mohs hardness | 6 – 7 |
| density (g/cm³) | 7.02 |
| colour | Brown to black, adamantine |
| type locality | Linwu, Hunan, China |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 476, 634, 776
notessubmitter remarks + registry
Standard cassiterite 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. |
|---|---|---|---|
| 2016-11-19 11:09 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | L.K. |
| 2016-11-24 10:11 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | P.S. |
| 2016-12-08 08:14 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: AMCSD #3755 | P.S. |
| 2016-12-09 08:33 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 04, drawer 27 | L.K. |
| 2018-12-09 08:39 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2020-12-08 16:44 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2022-12-08 14:07 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2024-12-07 10:56 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
physical location: vault C · shelf 04 · drawer 27 · last documented inspection: 2024-12-07 10:56 UTC