Colleen Chesebro introduced this. I gave it a go.
“The Diatelle is a fun, syllable counting form like the etheree with a twist. The syllable structure of the diatelle is as follows: 1/2/3/4/6/8/10/12/10/8/6/4/3/2/1, but unlike an ethere, has a set rhyme pattern of abbcbccaccbcbba. This poetry form may be written on any subject matter and looks best center aligned in a diamond shape.”
~RuthScribbles