How are the giongo/gitaigo double form and tto form related (きらきら vs. きらっと)


With many 擬音語 (ぎおんご, onomatopoeia) and 擬態語 (ぎたいご, mimetic words) there is a
double form, where the word is repeated, and a form with っと at the end. For
example:

  * きらきら -> きらっと (sparkling) 
  * ぴかぴか -> ぴかっと (twinkling) 
  * ぺろぺろ -> ぺろっと (slavering?) 
  * ちらちら -> ちらっと (fluttering) 
  * ごろごろ -> ごろっと (rumbling) 
  * どきどき -> どきっと (suddenly?)

Is there one of these forms for every 擬音語/擬態語? I couldn't find some in the
dictionary. How are the two forms used differently? Is this っと just another
grammatical form (like という)? And what about the similar forms ちらり, ちらりと and
ちらと or きらりと and きらり?




っと means for a short time. for example きらきら is sparkling all the time but きらっと
means it just sparkled for a moment. And it's same for others too.

What you are mistaken is that we write 擬態語 in Hiragana (平仮名 (I wasn't sure if
I wrote the English part right so I wrote it in Japanese)) and that we write
擬音語 in Katakana (片仮名). And for for 擬音語 we don't usually use っと. ごろごろ for
instance.

