AM-2015-10001-B · Scheelite, anomaly under reviewunverified
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. 5
| designation | Scheelite, anomaly under review |
|---|---|
| chemical formula | CaWO₄ |
| classification | Tungstate |
| crystal system | Tetragonal |
| mohs hardness | 4.5 – 5 |
| density (g/cm³) | 5.96 |
| colour | Pale yellow, fluorescent |
| type locality | Kongsberg, Buskerud, Norway |
raman spectroscopy532 nm · pass B
reported peaks (cm⁻¹): 334, 412, 798, 910
notessubmitter remarks + registry
Coherent drift of the 911 cm⁻¹ Raman peak by approximately ±0.3 cm⁻¹ over a four-hour acquisition window. Drift reverses when the specimen is held in darkness. The behaviour is consistent with the pattern reported for AM-2017-03404-C.
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. |
|---|---|---|---|
| 2015-12-12 14:43 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | H.D. |
| 2015-12-13 09:55 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | N.P. |
| 2015-12-25 08:56 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: ICDD card 04-7637 | N.P. |
| 2015-12-27 14:24 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 24, drawer 09 | H.D. |
| 2017-12-26 13:51 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2019-12-26 15:51 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2021-12-25 14:10 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
| 2023-12-25 10:50 UTC | re-inspection | seal intact · label legible · no visible degradation | N.P. |
physical location: vault B · shelf 24 · drawer 09 · last documented inspection: 2023-12-25 10:50 UTC