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-2017-10024-A

AM-2017-10024-A · Sideritearchived

physical & structuralrev. 2
designationSiderite
chemical formulaFeCO₃
classificationCarbonate / Calcite group
crystal systemTrigonal
mohs hardness3.5 – 4.5
density (g/cm³)3.95
colourSlightly tarnished, pale yellow-brown
type localityAnjanabonoina, Madagascar
raman spectroscopy532 nm · pass A
200400600800100012001400Raman shift (cm⁻¹)intensity (arb.)1852837331087
λ_excitation: 532 nm · acq. 3 × 10 s · grating 1800 g/mmfig. 1 · raman.am-2017-10024-a.svg

reported peaks (cm⁻¹): 185, 283, 733, 1087

notessubmitter remarks + registry

Specimen accompanied by a single typewritten card listing the locality and the year of collection. Original collection number illegible due to ink fade.