Mineral Information and Data:

Blodite
Na2Mg(SO4)2 • 4H2O [CNMNC approved formula]

Named for Carl August Bloede (1773-1820), German chemist.

IMA status : Approved Species 1821 ()
CLASSIFICATION 
Dana
(8th edition) :
29.03.03.01  
  (29) Hydrated Acid and Sulfates
  (29.03) where (A+)2 B (XO4)2 · x(H2O)
  (29.03.03) Blodite Group
  
Nickel-Strunz
(10th edition) :
07.CC.50
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.C) Sulfates (selenates, etc.) without Additional Anions, with H2O
  (07.CC) With medium-sized and large cations
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  
Other Properties: H2O Soluble. Gemstone Extremely Rare.

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