Metalography or Metallography: How To spell?

The word Metalography is misspelled against Metallography, a noun meaning "A method of transferring impressions of the grain of wood to metallic surfaces by chemical action."

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