Mineral Information and Data:

Caminite
Mg7(SO4)5(OH)4 • H2O [CNMNC approved formula]

Named from the Latin caminus, for chimney, as the mineral occurs in undersea black-smoker chimneys.

IMA status : Approved Species 1983 ()
CLASSIFICATION 
Dana
(8th edition) :
31.10.09.01  
  (31) Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.10) miscellaneous
  (31.10.09)
  
Nickel-Strunz
(10th edition) :
07.BB.05
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.B) Sulfates (selenates, etc.) with Additional Anions, without H2O
  (07.BB) With medium-sized cations
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  

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