AM-2023-10008-A · Cassiteriteunverified
The classification below is preliminary. Spectroscopic confirmation is incomplete; values shown reflect the most recent analytical pass and may be revised without notice.
physical & structuralrev. 1
| designation | Cassiterite |
|---|---|
| chemical formula | SnO₂ |
| classification | Oxide / Rutile group |
| crystal system | Tetragonal |
| mohs hardness | 6 – 7 |
| density (g/cm³) | 6.97 |
| colour | Brown to black, adamantine |
| type locality | Anjanabonoina, Madagascar |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 474, 632, 777
notessubmitter remarks + registry
Standard cassiterite reference specimen. Supplied as a single piece on a small fragment of host matrix.
chain of custody5 events · 2 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. |
|---|---|---|---|
| 2023-06-08 15:14 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2023-06-13 10:34 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | H.D. |
| 2023-06-20 08:56 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: AMCSD #8819 | H.D. |
| 2023-06-23 16:21 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 19, drawer 27 | T.J. |
| 2025-06-22 10:40 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
physical location: vault D · shelf 19 · drawer 27 · last documented inspection: 2025-06-22 10:40 UTC
errata · corrections of record1 entry
The following corrections have been issued for this record since accession. Original values are retained here for citation purposes; the canonical metadata above reflects the most recent correction.
| id | issued | field | was | now |
|---|---|---|---|---|
| ERR-2008-0004 | 2008-06-16 | crystalSystem | trigonal | trigonal (R3̄c) |