Molecular Spectral Databases - Frequency Search Molecular Spectral Databases for Microwaves Main Page
You can search by frequency across all three of our molecular spectral databases using the form below.

Warning: If you choose to search across many molecules, your search may take many minutes to execute. Some browsers may time out resulting in a message like "Document contains no data."

Diatomics         Triatomics         Hydrocarbons
Frequency Range: to MHz
ASCII output instead of HTML tables


For information about methods used in tabulation use one of the three links below.

NIST Physical Measurement LaboratoryBack to the Diatomic Spectral Database Main PageBack to the Triatomic Spectral Database Main PageBack to the Hydrocarbon Spectral Database Main Page National Institute of Standards and Technology NIST Physical Measurement Laboratory