Argilite or Argillite: How To spell?

The word Argilite is misspelled against Argillite, a noun meaning "Argillaceous schist or slate; clay slate. Its colors is bluish or blackish gray, sometimes greenish gray, brownish red, etc."

Argillite has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings argi & ite which should not be misspelled with single 'L'
Wrong Spelling:  argi-l-ite 
Correct Spelling:  argi-ll-ite 
Find more wrongly spelled words of Argillite to spell it well.