NIST produces the Nation’s Standard Reference Data (SRD). These data are assessed by experts and are trustworthy such that people can use the data with confidence and base significant decisions on the data. NIST provides 49 free SRD databases and 41 fee-based SRD databases. SRD must be compliant with rigorous critical evaluation criteria. Send questions to data [at] nist.gov (data[at]nist[dot]gov) or call 1(844) 374-0183 (Toll Free).

Popular Data Products

Recent Update.  NIST ICSD SRD3 is currently available, visit https://icsd.nist.gov

• REFPROP: Reference Fluid Thermodynamic and Transport Properties FAQ
• NIST23: NIST Mass Spectral Libraries, 2023 Edition MS Data Center
• ICSD: The NIST Inorganic Crystal Structure Database (ICSD) is a comprehensive collection of crystal structure data of inorganic compounds containing more than 210,000 entries and covering the literature from 1913.
• TDE: NIST ThermoDataEngine 
• PIV Cards: NIST Test Personal Identity Verification Card
• PED: NIST-ACers Phase Equilibria Diagram Database 5.2 demo and PED Editor
• SESSA: NIST Simulation of Electron Spectra for Surface Analysis. Now Free!
• Special Databases - Biometrics
• Selected NIST-Recommended Practice Guides in Material Sciences

Download NIST Simulation of Electron Spectra for Surface Analysis at no cost.  The surface databases provide data for surface analysis by Auger-electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS). In addition, the NIST Electron Elastic-Scattering Cross-Section Database (SRD 64) and the NIST Database of Cross Sections for Inner-Shell Ionization by Electron or Positron Impact (SRD 164) provide data for Monte Carlo simulations of electron transport in matter and for applications in atomic physics, plasma physics, radiation physics, and materials analysis by electron-probe microanalysis.

SRD Customer Support

100 Bureau Drive, Stop 6410
Gaithersburg, MD 20899-6410
Tel: 1(844) 374-0183 (Toll Free)
e-mail data [at] nist.gov (data[at]nist[dot]gov)