Browse reference spectra from the USGS Spectral Library Version 7 and other curated sources. Each spectrum includes interactive plots, metadata, and downloadable data.
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| Formula | Modality | Category | Source | ||
|---|---|---|---|---|---|
| Xanthine SA-X0626 85K | — | NIR | Organic | USGS | |
| Xanthine SA-X0626 90K | — | NIR | Organic | USGS | |
| Xanthohumol | C21H22O5 | Mass Spec | Natural product | MassBank | |
| Xanthomegnin | C30H22O12 | Mass Spec | Environmental | MassBank | |
| Xanthone | C13H8O2 | Mass Spec | Environmental | MassBank | |
| Xanthopterin | C6H5N5O2 | Mass Spec | Chemical | MassBank | |
| Xanthosine-5'-monophosphate | C10H13N4O9P | Mass Spec | Metabolite | MassBank | |
| Xanthotoxin | C12H8O4 | Mass Spec | Natural product | MassBank | |
| Xanthurenate | C10H7NO4 | Mass Spec | Chemical | MassBank | |
| Xanthurenic acid | C10H7NO4 | Mass Spec | Metabolite | MassBank | |
| Xe4F12 | Xe4F12 | FTIR | Inorganic | CRD Oulu | |
| Xenotime | — | NIR | Mineral | USGS | |
| Xenotime+Monazite REE | — | NIR | Soil | USGS | |
| Xipamide | C15H15ClN2O4S | Mass Spec | Pharmaceutical | MassBank | |
| XylManGlcNAcFucGlcNAc | C33H56N2O24 | Mass Spec | Natural product | MassBank | |
| Xylanase substrate (emission) | — | Fluorescence | Fluorescent dye | FPbase | |
| Xylazine | C12H16N2S | Mass Spec | Chemical | MassBank | |
| Xylene(s) ice 77K | — | NIR | Organic | USGS | |
| Xylitol | C5H12O5 | Mass Spec | Natural product | MassBank | |
| Xylometazoline | C16H24N2 | Mass Spec | Chemical | MassBank | |
| Xylose 1-phosphate | C5H11O8P | Mass Spec | Chemical | MassBank | |
| Xylylcarb | C10H13NO2 | Mass Spec | Pesticide | MassBank | |
| Y-METHYLBICYCLO(4.3.0)NON-6-EN-8-ONE | C10H14O | Mass Spec | Chemical | MassBank | |
| Y12S18 | Y12S18 | Raman | Inorganic | CRD Oulu | |
| Y2Ag2Se4 | Y2Ag2Se4 | Raman | Inorganic | CRD Oulu | |
| Y2Ag2Te4 | Y2Ag2Te4 | Raman | Inorganic | CRD Oulu | |
| Y2Ag6P4S16 | Y2Ag6P4S16 | FTIR | Inorganic | CRD Oulu | |
| Y2Ag6P4S16 | Y2Ag6P4S16 | Raman | Inorganic | CRD Oulu | |
| Y2Br2O2 | Y2Br2O2 | Raman | Inorganic | CRD Oulu | |
| Y2H2O4 | Y2H2O4 | FTIR | Inorganic | CRD Oulu | |
| Y2K2P8O24 | Y2K2P8O24 | Raman | Inorganic | CRD Oulu | |
| Y2K2P8O24 | Y2K2P8O24 | FTIR | Inorganic | CRD Oulu | |
| Y2O2As2Zn2 | Y2O2As2Zn2 | Raman | Inorganic | CRD Oulu | |
| Y2O2CN2 | Y2O2CN2 | FTIR | Inorganic | CRD Oulu | |
| Y2O2CN2 | Y2O2CN2 | Raman | Inorganic | CRD Oulu | |
| Y2O2Cl2 | Y2O2Cl2 | Raman | Inorganic | CRD Oulu | |
| Y2SeO2 | Y2SeO2 | Raman | Inorganic | CRD Oulu | |
| Y2Ta2O8 | Y2Ta2O8 | Raman | Inorganic | CRD Oulu | |
| Y2Ta2O8 | Y2Ta2O8 | FTIR | Inorganic | CRD Oulu | |
| Y4C2N4O4 | Y4C2N4O4 | Raman | Inorganic | CRD Oulu | |
| Y4C2N4O4 | Y4C2N4O4 | FTIR | Inorganic | CRD Oulu | |
| Y4Cu4Pb4S12 | Y4Cu4Pb4S12 | Raman | Inorganic | CRD Oulu | |
| Y4Ge2Be4O14 | Y4Ge2Be4O14 | FTIR | Inorganic | CRD Oulu | |
| Y4Ge2Be4O14 | Y4Ge2Be4O14 | Raman | Inorganic | CRD Oulu | |
| Y4Sc4O12 | Y4Sc4O12 | FTIR | Inorganic | CRD Oulu | |
| Y4Sc4O12 | Y4Sc4O12 | Raman | Inorganic | CRD Oulu | |
| Y4Se4O12F4 | Y4Se4O12F4 | FTIR | Inorganic | CRD Oulu | |
| Y4Se4O12F4 | Y4Se4O12F4 | Raman | Inorganic | CRD Oulu | |
| Y4Si4O14 | Y4Si4O14 | FTIR | Inorganic | CRD Oulu | |
| Y4Si4O14 | Y4Si4O14 | Raman | Inorganic | CRD Oulu |