General note: Formulas are case sensitive

Formula:

CaCO3

Formula with fragments:

CaCO3+6H2O

Formula with parentheses:

HO ((CH2)2O)6 H

Formula with isotope:

CaCO[18]3+6H2O

Counts can be integer or decimal:

CaCO3+(3HO1.5)2

Note: The whitespace arround the separators below ('//') is significant.

Mass fractions use %wt, with the final portion adding to 100%:(Note: Do not specify a percentage on the last part!)

10%wt Fe // 15% Co // Ni

Volume fractions use %vol, with the final portion adding to 100%:(Note: Do not specify a percentage on the last part!)

10%vol Fe@8.1 // Ni@8.5

For volume fractions you have to specify the density using @density!

Layers are specified by thickness (units mm/µm/nm)

10nm Au // 1um Ti // 1mm Si

Note: use um for µm!

Mixtures can nest. The following is a 10% salt solution by weight mixed 20:80 by volume with D2O:

20%vol (10%wt NaCl@2.16 // H2O@1) // D2O@1