AM-2012-10020-A · Malachitearchived
physical & structuralrev. 2
| designation | Malachite |
|---|---|
| chemical formula | Cu₂(CO₃)(OH)₂ |
| classification | Carbonate / hydrous |
| crystal system | Monoclinic |
| mohs hardness | 3.5 – 4 |
| density (g/cm³) | 4.09 |
| colour | Botryoidal dark green |
| type locality | Shimen, Hunan, China |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 178, 271, 432, 1098
notessubmitter remarks + registry
Crystals up to 20 mm on edge, with euhedral faces. On dolomite 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. |
|---|---|---|---|
| 2012-12-27 08:03 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | P.S. |
| 2012-12-31 09:19 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2013-01-15 09:38 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: RRUFF R05003 | T.J. |
| 2013-01-16 15:35 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 14, drawer 19 | P.S. |
| 2015-01-16 15:12 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2017-01-15 14:09 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2019-01-15 14:08 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2021-01-14 14:16 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
physical location: vault A · shelf 14 · drawer 19 · last documented inspection: 2021-01-14 14:16 UTC