Tachydrite or Tachhydrite: How To spell?

The word Tachydrite is misspelled against Tachhydrite, a noun meaning "A hydrous chloride of calcium and magnesium occurring in yellowish masses which rapidly deliquesce upon exposure. It is found in the salt mines at Stassfurt."

--> Tachhydrite has double "hh" is mispronounced as "h"
Remember double 'HH' in between the strings tac & ydrite which should not be misspelled with single 'H'
Wrong Spelling:  tac-h-ydrite 
Correct Spelling:  tac-hh-ydrite 
Find more wrongly spelled words of Tachhydrite to spell it well.

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