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https://www.nist.gov/srd

Standard Reference Data

For over 50 yearsNIST has developed and distributed Standard Reference Data in ChemistryEngineeringFluids and Condensed PhasesMaterial SciencesMathematical and Computer Sciences and Physics..

NIST Mass Spectral Libraries2023 Edition

NIST Mass Spectral Libraries2026 Edition

NIST INORGANIC CRYSTAL STRUCTURE DATABASE (ICSD) SRD3

REFPROP: NIST Reference Fluid Thermodynamic and Transport Properties

New Database

Crystal Structure Databasefor more information visit https://icsd.nist.gov

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 availablevisit https://icsd.nist.gov

REFPROP: Reference Fluid Thermodynamic and Transport Properties FAQ
NIST26: NIST Mass Spectral Libraries2026 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 6.0. 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 additionthe 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 physicsplasma physicsradiation physicsand materials analysis by electron-probe microanalysis.