AM-2026-00017-A · Boraxarchived
physical & structuralrev. 1
| designation | Borax |
|---|---|
| chemical formula | Na₂B₄O₇·10H₂O |
| classification | Borate |
| crystal system | Monoclinic |
| mohs hardness | 2 – 2.5 |
| density (g/cm³) | 1.71 |
| colour | Colourless to white |
| type locality | Pajsberg, Värmland, Sweden |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 220, 576, 875
notessubmitter remarks + registry
Prismatic crystals of colourless to white appearance with dulled surfaces consistent with partial efflorescence. Submitted as part of a small consignment of Pajsberg material; locality recorded to district level only. Specimen stored in sealed conditions at controlled humidity to limit further dehydration.
chain of custody3 events · 0 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. |
|---|---|---|---|
| 2026-08-14 12:32 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | M.A. |
| 2026-08-19 10:55 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | C.B. |
| 2026-09-02 10:49 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: AMCSD #8930 | C.B. |
physical location: vault A · shelf 01 · drawer 16 · last documented inspection: 2026-09-02 10:49 UTC