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version (4.71 KB) by Are Mjaavatten
Create tables of thermophysical properties for gases


Updated 06 Apr 2020

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Downloads data tables from the NIST Chemistry Webbook ( for a specified temperature and/or pressure range. The tables are useful for plotting or for data lookup by interpolation.

Cite As

Are Mjaavatten (2021). nistdata(species,T,p) (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (8)

Andrew Vuong

Joseph Cavanaugh

Seyfullah Orhan

Are Mjaavatten

You are absolutely right, Alexandra. At some point I changed the unit read from NIST from micro Pa/s to Pa/s, but kept the old conversion factor. I seldom use transport properties, so this blatant error passed under the radar. Thank you for pointing this out. The new version (1.4) should be correct.

I think your unit conversions are incorrect. I am getting a viscosity on the order of 1e-11 Pa-s

Are Mjaavatten

Thanks to Martijn van Heumen for his constructive comment. The code has been updated accordingly in version 1.3.

Martijn van Heumen

Thank you!
The file did not work for me under R2018b. After replacing txt = webread(url); by options = weboptions('RequestMethod','get','ArrayFormat','csv','ContentType','text'); txt = webread(url,options); it works perfectly.

William Ledbetter

MATLAB Release Compatibility
Created with R2014b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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