prometheus.thermo_data.parsers.janaf

Parser for JANAF thermochemical table data (.jnf format).

Produces rows in the janaf.csv schema used by SpeciesDatabase._load_janaf.

Raw source file: JANAF.jnf

File format

Each species block begins with a header line:

{HillFormula} {phase_code}

followed immediately by a fixed column-header line, then one CSV data row per temperature point:

T,Cp,S,[G-H(Tr)]/T,H-H(Tr),Delta_fH,Delta_fG,log(Kf)
0.0,0.0,0.0,inf,-6.197,904.858,,
100.0,20.786,...

The next species block starts at the next line that begins with an uppercase letter and does not start with T,.

Classes

JANAFParser()

Parse a JANAF.jnf file into janaf.csv rows.
class prometheus_equilibrium.thermo_data.parsers.janaf.JANAFParser

Bases: object

Parse a JANAF.jnf file into janaf.csv rows.

Usage:

rows = JANAFParser().parse("raw/JANAF.jnf")
# rows is a list of lists; first row is the header

The first row of the return value is always JANAF_COLUMNS.

parse(path: str, source: str = '') → List[List[str]]

Parse path and return all rows (header + data) as string lists.

Each data row has 11 fields matching JANAF_COLUMNS. Empty fields are represented as empty strings.

Parameters:

  • path – Path to the JANAF.jnf file.

  • source – Human-readable label for this data source (e.g. "JANAF-4th-Ed"). Logged at INFO level; not embedded in CSV rows (schema is fixed).

Returns:

List of rows; first row is the column-header list.