Chloragaluminite – [(Mg,Fe2+)4Al2(OH)12(Cl2CO3 · 2H2O]

Chlormagaluminite is one of the newer minerals found at Mont Saint-Hilaire. It was originally called “chlor-manasseite”.

PHYSICAL CHARACTERISTICS:

 

  • Color is usually colorless to yellow-brown.
  • Luster is (?).
  • Diaphaneity is (?).
  • Crystal System is hexagonal; P6/mcm.
  • Crystal Habits include tabular crystals and aggregates of hexagonal
    dipyramids.
  • Cleavage {0001} is perfect.
  • Fracture is (?).
  • Hardness is 1 (?).
  • Specific Gravity is approximately 2.0 g/cm3.
  • Streak is (?).
  • Associated Minerals include calcite
  • Distinguishing Features: Crystal habits.
  • Origin: Named in 1982 for its composition: chlorine, magnesium and
    aluminium.

 

 

Dana class # 10.6.10.1 – Halogenides; oxyhalides and hydroxyhalides
Strunz class # V/E.2-2 – Nitrates, carbonates & borates;
water-bearing carbonates with unfamiliar anions, manasseite group