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-2018-10001-A

AM-2018-10001-A · Goethitearchived

physical & structuralrev. 1
designationGoethite
chemical formulaFeO(OH)
classificationOxide-hydroxide
crystal systemOrthorhombic
mohs hardness5 – 5.5
density (g/cm³)4.32
colourBotryoidal black-brown
type localityRatnapura, Sabaragamuwa, Sri Lanka
raman spectroscopy532 nm · pass A
200400600800100012001400Raman shift (cm⁻¹)intensity (arb.)248386477548684
λ_excitation: 532 nm · acq. 3 × 10 s · grating 1800 g/mmfig. 1 · raman.am-2018-10001-a.svg

reported peaks (cm⁻¹): 248, 386, 477, 548, 684

notessubmitter remarks + registry

Standard goethite reference specimen. Supplied as a single piece on a small fragment of host matrix.