NIST, National Institute of Standards and Technology, U.S. Department of Commerce
NIST Temperature Scale Database (SRD 60), Version 3.0

Fixed Points Associated with a Selected Reference:

Temperature Scale Points
All Fixed Points

Reference:

Cezairliyan A., Measurement of Melting Point, Normal Spectral Emittance (at Melting Point), and Electrical Resistivity (above 2650 K) of Niobium by a Pulse Heating Method, High Temp. High Press., 1972, 4, 453-458. (No DOI) (1972)

Substance
 
Transition
 
T90 (K)
 
u(T90)
(mK)
 
T-T90
(mK)
 
u(T-T90)
(mK)
 
u(T90) (K)
 
Eval
 
NbMP