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Definition of Physical Constants
in AsTher

Constants and references are given in the file \AsTher\data\AsTher.ref
Molar weight of the elements, the name of the elements, as well as the gas constant (R) can be changed in the file, if other data is common or current.
It is also possible to define eight new elements.

In the following,
U{236} is specified as a new element.
The element Tritium can be inserted (by deleting the first symbol # in the line ).
The symbol of Lawrencium can be changed (by deleting the first symbol # in the line ).

When a new dataset is inserted using another references, the new reference and their number can be given

File \AsTher\data\AsTher.ref # AsTher version 7.25 [Constants] R=8.31446261 [Elements] # Add new Element # Symbol=Name; n:atom number; m: atomic mass # Add U{236} as new element U{236}=Uranium; n:92; m:236; # # Add new element, Delete # to take effect # T=Tritium; n:1; m:3.0160495 # # Rename an element # Delete # to take effect Lw to Lr # when Lr does not exists, an error message will be shown # Lw=Lawrencium; m:262; n:103; x:Lr [Reference] 1: JPCRD; JJ. Phys Chem. Ref. Data - JANAF Thermodynamical Tables \see also: https://www.nist.gov/srd/journal-physical-and-chemical-reference-data 2: NIST; https://webbook.nist.gov/chemistry/ 3: Perry; \R. H. Perry, C. H. Chilton: Chemical Engineers Handbook, 5th ed.(1973). \R. H. Perry, D. W. Green, J. O. Maloney: Perrys Chemical Engineers Handbook, 8th ed. (2007) 4: CRC; \David R. Lide: Handbook of Chemistry and Physics . . . . . . . . . 22: 22:noaa;https://cameochemicals.noaa.gov/chris/IPR.pdf n: add new reference n>22 |  | The application "Database Administration" (\AsTher\bin\DBAdmin.exe) can be used to view and modify the file \AsTher\data}AsTher.ref . Menu [Database]->[References] The file can also be edited with any text editor. The file must be saved as text (e.g., UTF8).