> If it is the case, could you please give me several examples (words)
> containing this sound. I think the first "A" in "America" should be
> Lojban's schwa. Am I right?
I'd say that the first "A" in "America" is a shwa, yes.
> I've heard this sound called "shwi").
They're called "schwa" and "schwi" in fact, with the "c."
A most significant example I've seen in a book on English
grammar was "station" (pronounced as: [steicyn]).
Actually, several nouns ending in "-ion" have the schwa
vowel.
mi'e xiLI,odor.