Formula Entry
The Formula Entry compositional string must be entered as a string of characters for element symbols and numbers for subscripts. For example :
Fe2SiO4 :
Enter as : "fe2sio4"
CaCO3
Enter as "caco3"
Note that subscripts of 1 need not be specified. If an element is present in the formula string more than once, the program will automatically sum the subscripts. Do not use fractional subscripts.
Note that because some formulas are "ambiguous" when parsed one character at a time, use both upper and lower case characters to eliminate confusing the formula parser. For example: "yba2cu3o7" will be interpreted as yttrium, boron and an undefined element "a". Instead, enter the string as "YBa2Cu3O7" and the formula will be parsed correctly.