public catalogue · open access · last index pass 2026-05-08 08:14:02 UTChost: cat-pub-04 · build 0.14.3-prototype · rev rA9F2
overviewcatalogueAM-2020-10010-A

AM-2020-10010-A · Gypsumwithdrawn

This record has been withdrawn from active circulation. Historical metadata is retained for citation purposes only. Contact the registry before referencing this accession in new publications.
physical & structuralrev. 2
designationGypsum
chemical formulaCaSO₄·2H₂O
classificationSulfate
crystal systemMonoclinic
mohs hardness1.5 – 2
density (g/cm³)2.35
colourColourless, transparent
type localityPanasqueira, Castelo Branco, Portugal
raman spectroscopy532 nm · pass A
200400600800100012001400Raman shift (cm⁻¹)intensity (arb.)417618670
λ_excitation: 532 nm · acq. 3 × 10 s · grating 1800 g/mmfig. 1 · raman.am-2020-10010-a.svg

reported peaks (cm⁻¹): 417, 618, 670

notessubmitter remarks + registry

Photographic record retained. Routine intake; no anomalies noted.