Crystalographer or Crystallographer: How To spell?

The word Crystalographer is misspelled against Crystallographer, a noun meaning "One who describes crystals, or the manner of their formation; one versed in crystallography."

Crystallographer has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings crysta & ographer which should not be misspelled with single 'L'
Wrong Spelling:  crysta-l-ographer 
Correct Spelling:  crysta-ll-ographer 
Find more incorrect spellings of Crystallographer to spell right way.