| ... | ... | @@ -1886,7 +1886,7 @@ setting a `+` (`-`) sign in front of the specie label. Optionally, the | 
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user can assign each specie its initial mass fraction (`MASSFRAC`) which
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considerably simplifies the definition of IC for the species number
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densities in the user interface `configUser.c` (cf.
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\[here\](3.2-User-interfaces\#user-defined-intial-conditions)). The
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\[Defining IC\](3.2-User-interfaces\#defining-intial-conditions)). The
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species properties are collected in a substructure `_C.X[is]` of the
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public structure `_C` where `is` denotes the species index.
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